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      id="h_0811b519_1e84_427f_a0a1_c09c4149207b"
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      contextRef="TI20260731_C000099061Member_UnclassifiedSectorMember"
      decimals="4"
      id="h_0e9d9304_183d_4ece_925a_36fcb408fb63"
      unitRef="pure">0.030</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048896Member_IndustrialSectorMember"
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      id="h_0fcc1c7f_5f4b_4aa9_8612_9ac24f5d47a4"
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      contextRef="TI20260731_C000099059Member_ConsumerDiscretionarySectorMember"
      decimals="4"
      id="h_11133a37_28ec_4ab9_99e3_779d4699cab7"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047998Member_FinancialServicesSectorMember"
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      id="h_12112cd0_bf70_4238_a477_78fc9b7803e9"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048001Member_IndustrialSectorMember"
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      id="h_13d81e98_ee9b_47c6_b2b3_ce137f6c6c5c"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047995Member_UtilitiesSectorMember"
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      id="h_143c3ba8_6e91_4413_b4e5_876e7d54bcd1"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048897Member_ConsumerStaplesSectorMember"
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      id="h_166ab6a3_1dfa_4753_a47b_fb06136133b3"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048902Member_MaterialsSectorMember"
      decimals="4"
      id="h_17402b4a_ae8f_441a_8210_fdc968549256"
      unitRef="pure">0.835</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099061Member_CommunicationsSectorMember"
      decimals="4"
      id="h_174b3e85_4e4b_4ec5_a61d_d29ea9ad82a3"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047995Member_FinancialServicesSectorMember"
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      id="h_1797866d_961a_4a49_a698_476ac0ac7d1b"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047999Member_ConsumerStaplesSectorMember"
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      id="h_1874a8aa_24a8_49a8_897a_553e5235cbd8"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099060Member_FinancialServicesSectorMember"
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      id="h_18bd303f_a3c5_490f_86ee_f458374527ab"
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    <oef:PctOfTotalInv
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      id="h_19e84e8b_ca27_461c_805e_dde39cc55a73"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048899Member_IndustrialSectorMember"
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      id="h_1abb589e_94a5_4f07_86d1_bc472f4f43e0"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047998Member_EnergySectorMember"
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      id="h_1c807c87_04bb_42a4_ae09_cc4409197700"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047996Member_ConsumerStaplesSectorMember"
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      id="h_1cc3c2b0_11dd_4bee_a607_cf668beac57c"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048903Member_InformationTechnologySectorMember"
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      id="h_1d4f2c05_d0df_4531_b8db_e607259f80db"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047997Member_EnergySectorMember"
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      id="h_1e6870ad_34aa_4464_a63c_226bea0db613"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047996Member_MaterialsSectorMember"
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      id="h_1eaa153a_cdbb_4455_9101_cc449d8cebfa"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048904Member_MoneyMarketFundsMember"
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      id="h_2075e361_7e4f_4f12_ab1d_1254914c9544"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047999Member_MaterialsSectorMember"
      decimals="4"
      id="h_227154b4_472a_4b91_b256_be9ceb7baf3b"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048900Member_MoneyMarketFundsMember"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099061Member_MaterialsSectorMember"
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      id="h_27a7b3bb_7553_44cf_ae60_3c0acd401add"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099062Member_HealthcareSectorMember"
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      id="h_282bdc82_32cb_4d1d_847b_5b77c4721bb0"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_MoneyMarketFundsMember"
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      id="h_285e03e2_756c_461c_91f9_8fca60a4b967"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048000Member_UtilitiesSectorMember"
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      id="h_29684c93_d940_42db_8c52_4ae99c727842"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099060Member_EnergySectorMember"
      decimals="4"
      id="h_2f919680_3881_43ea_827e_fcc8351af27c"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_UnclassifiedSectorMember"
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      id="h_31481651_84c4_49c6_8850_3f315bf9a527"
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      contextRef="TI20260731_C000048902Member_MoneyMarketFundsMember"
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      id="h_320e1d5a_26f6_40c5_a912_3361427d0976"
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      contextRef="TI20260731_C000048897Member_MoneyMarketFundsMember"
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      contextRef="TI20260731_C000099061Member_EnergySectorMember"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099062Member_MaterialsSectorMember"
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      contextRef="TI20260731_C000099061Member_IndustrialSectorMember"
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      contextRef="TI20260731_C000048899Member_FinancialServicesSectorMember"
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      contextRef="TI20260731_C000048898Member_IndustrialSectorMember"
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      contextRef="TI20260731_C000047998Member_IndustrialSectorMember"
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      contextRef="TI20260731_C000048001Member_CommunicationsSectorMember"
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      contextRef="TI20260731_C000099062Member_InformationTechnologySectorMember"
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      contextRef="TI20260731_C000047996Member_RealEstateSectorMember"
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      id="h_56fcea47_8e4b_4901_a766_536ce7e59185"
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      contextRef="TI20260731_C000099062Member_EnergySectorMember"
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      contextRef="TI20260731_C000048896Member_CommunicationsSectorMember"
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      contextRef="TI20260731_C000099062Member_UnclassifiedSectorMember"
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      id="h_59db1423_bf69_44f8_90e7_725aef1ac4a3"
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      contextRef="TI20260731_C000048000Member_HealthcareSectorMember"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048000Member_ConsumerStaplesSectorMember"
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      id="h_5b2f00e7_384f_480a_9ca5_8bd6df1c598a"
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      contextRef="TI20260731_C000099060Member_ConsumerDiscretionarySectorMember"
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      id="h_5c069dff_886c_4f4d_9f2c_a4ba28a774ef"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047995Member_InformationTechnologySectorMember"
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      id="h_5d963c4f_8789_4fb9_9ec2_862ebe1e1188"
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      contextRef="TI20260731_C000048001Member_RealEstateSectorMember"
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      id="h_5ea4b42b_a587_4d32_8f97_40ec1b422d40"
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      contextRef="TI20260731_C000047997Member_IndustrialSectorMember"
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      id="h_6036cdf5_6c30_467f_be32_97acb697ee77"
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      contextRef="TI20260731_C000048001Member_UnclassifiedSectorMember"
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      id="h_62547bd4_a8ad_4553_837f_1eb4cd41eca0"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048903Member_ConsumerDiscretionarySectorMember"
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      id="h_6314cf6d_21f6_4d9a_bd8c_bdfbab3ee748"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099060Member_UtilitiesSectorMember"
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      id="h_64b9951f_1f5c_496e_8ce1_566c50141856"
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      contextRef="TI20260731_C000048000Member_FinancialServicesSectorMember"
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      id="h_654ed22e_5502_4691_9474_8d8167976fe1"
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      contextRef="TI20260731_C000048898Member_MoneyMarketFundsMember"
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      contextRef="TI20260731_C000047997Member_InformationTechnologySectorMember"
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      id="h_6906f87d_00e8_4c9c_a7c1_26ae4ae7fde2"
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      contextRef="TI20260731_C000047998Member_UnclassifiedSectorMember"
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      id="h_6968f55d_5a87_42c3_8e07_60550cda65ca"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047996Member_EnergySectorMember"
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      id="h_6c666825_ef73_4a8f_87d0_f91a9dad429a"
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      contextRef="TI20260731_C000047999Member_IndustrialSectorMember"
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      id="h_6ca1bde1_a672_4a20_9b13_15e6a9f4a3f8"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099060Member_MaterialsSectorMember"
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      id="h_6e84bd24_22b7_4ace_a5f8_0c7fc5f57e68"
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      contextRef="TI20260731_C000047995Member_ConsumerDiscretionarySectorMember"
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      id="h_6f329400_d156_40ff_8c10_915c1254e0b8"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047997Member_HealthcareSectorMember"
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      id="h_6fcd982c_2ce1_4d62_925f_b7565a2c253a"
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      contextRef="TI20260731_C000047996Member_InformationTechnologySectorMember"
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      id="h_719cbae9_e65d_4d40_a2a2_b65760bce039"
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      contextRef="TI20260731_C000048901Member_FinancialServicesSectorMember"
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      id="h_72727f76_1ec5_487d_93d3_a7961af5ae80"
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      id="h_72979e1f_2324_4be7_9b93_74d15a734591"
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      contextRef="TI20260731_C000048903Member_CommunicationsSectorMember"
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      id="h_73591ac6_79f3_42b1_b8fa_adca5c24496d"
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      contextRef="TI20260731_C000099061Member_HealthcareSectorMember"
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      id="h_76b4639e_cc11_4d22_8177_7bb97e906fd0"
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      contextRef="TI20260731_C000048904Member_UtilitiesSectorMember"
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      id="h_79271079_0a03_46d3_9f05_78e0e9764fbb"
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      contextRef="TI20260731_C000048901Member_MaterialsSectorMember"
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      id="h_7ab249fb_1eb5_4484_9b12_d983d22ac383"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_InformationTechnologySectorMember"
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      id="h_80c3641b_5cd1_4dc5_b37a_a85e19874931"
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      contextRef="TI20260731_C000048896Member_ConsumerStaplesSectorMember"
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      id="h_824c7c42_bee5_4c60_8d40_fd85a3deddc6"
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      contextRef="TI20260731_C000048001Member_FinancialServicesSectorMember"
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      id="h_85da7953_5194_4878_86f5_0bb69b1015d6"
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      id="h_8745a228_d047_478c_bf75_0a5e0896250c"
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      contextRef="TI20260731_C000099059Member_FinancialServicesSectorMember"
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      id="h_8762647e_ad8e_45a4_81e3_a2e9579621f7"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048902Member_IndustrialSectorMember"
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      id="h_898ebcd1_b3f2_48b5_be22_3ce7a4334c39"
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      contextRef="TI20260731_C000099062Member_IndustrialSectorMember"
      decimals="4"
      id="h_8a5ae46e_9916_49e4_a30a_843d92830b50"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_HealthcareSectorMember"
      decimals="4"
      id="h_8b041801_c585_489a_b3b0_0a22776d3cf8"
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      contextRef="TI20260731_C000048900Member_HealthcareSectorMember"
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      id="h_8bd87084_e491_4fb6_9ea3_e1eb3641461d"
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      contextRef="TI20260731_C000047995Member_CommunicationsSectorMember"
      decimals="4"
      id="h_8d1f0e30_a74a_4e51_af02_26a677113529"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047999Member_CommunicationsSectorMember"
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      id="h_8de76ffa_9973_4203_af03_eecf951a2e08"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047996Member_ConsumerDiscretionarySectorMember"
      decimals="4"
      id="h_8efc7531_ba28_43f7_aa23_9e82c5cd7755"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099060Member_IndustrialSectorMember"
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      id="h_909f1d44_60d8_45c9_a218_4f03ce7d3cf2"
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      contextRef="TI20260731_C000047996Member_UnclassifiedSectorMember"
      decimals="4"
      id="h_9226be04_aee5_4bfe_ae45_e432c6d631b4"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_EnergySectorMember"
      decimals="4"
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      id="t_3_ce0389b0_351a_451d_8cda_2f57b674dcab">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXD&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048896Member"
      id="t_5_fab1f9ef_8555_460b_9f6d_70aa196ad657">www.ftportfolios.com/fund-documents/etf/FXD</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048896Member"
      id="t_6_7c30e39c_58fc_4f27_9eb6_ba864b3976f6">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048896Member"
      id="t_4_2611abeb_705b_47e2_994e_7d9883306625">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_7_4cbef830_9518_4c25_b543_e060110fb1f3">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Consumer Discretionary AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048896Member"
      decimals="INF"
      id="h_1_4637c0f2_a9d6_4281_bfda_b5e336788d53"
      unitRef="USD">67</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048896Member"
      decimals="4"
      id="h_2_135d31aa_bb81_47be_87ea_a9fee444f43c"
      unitRef="pure">0.0064</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_8_7e2d3281_79f4_4f26_a671_ec1e72f9d701">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 8.85% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Discretionary Index, which returned 7.52% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Specialty Retail industry received the greatest allocation of any industry with an average weight of 18.4% and contributed 2.7% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. With an average weight of 1.9%, investments in the Distributors industry contributed &#x2013;0.6% to the Fund&#x2019;s overall return, which was the most negative return contribution of any industry.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_9_387fb8a7_5b6d_4e55_be22_9e80abaf5896">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274381.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_10_cec97772_9fdf_43eb_bd88_a6d65118e58d">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Consumer Discretionary AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Discretionary Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Discretionary Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Discretionary Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_C000048896Member"
      id="t_20_d0e77ae4_d6f4_bd50_3589_470611c92250">First Trust Consumer Discretionary AlphaDEX&#xae; Fund</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_C000048896Member"
      decimals="4"
      id="h_3_4dbb0414_6644_4907_b05f_733b203dfc94"
      unitRef="pure">0.0885</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_C000048896Member"
      decimals="4"
      id="h_4_38df3613_f77f_4fa4_adc9_7e1d5303652b"
      unitRef="pure">0.0355</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_C000048896Member"
      decimals="4"
      id="h_5_9c60e0b0_bddc_4328_ab81_eee6e0415f34"
      unitRef="pure">0.0777</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_StrataQuantConsumerDiscretionaryIndexMember"
      id="t_21_7be74e96_5d71_f73b_fa0b_285998665471">StrataQuant&#xae; Consumer Discretionary Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_StrataQuantConsumerDiscretionaryIndexMember"
      decimals="4"
      id="h_6_64fa2c32_e2f6_4ac0_8231_3f7ee4e57727"
      unitRef="pure">0.0950</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_StrataQuantConsumerDiscretionaryIndexMember"
      decimals="4"
      id="h_7_45505850_44dc_4dcb_ae97_9aafdc0d9226"
      unitRef="pure">0.0416</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_StrataQuantConsumerDiscretionaryIndexMember"
      decimals="4"
      id="h_8_f76b2892_9920_44bb_8fa3_28e0e407f791"
      unitRef="pure">0.0843</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell3000IndexMember"
      decimals="4"
      id="h_20_7ba650f7_6d37_41e9_828b_6251b6d6e679"
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_11_33671cb9_6c62_40e0_a999_593a4a964846">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXD&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000048896Member"
      id="t_12_056f74f4_df84_4223_a8e1_5962f941845e">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_13_41a17013_3459_41fa_a21d_a2462fdbee40">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_14_033756c5_63ef_43c4_9f52_cd294cb7f3af">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;269,173,641&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;114&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,464,185&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048896Member"
      decimals="INF"
      id="h_21_c640538b_39aa_43e7_8739_6653f38795b6"
      unitRef="USD">269173641</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048896Member"
      decimals="INF"
      id="h_22_d618b1dc_b012_4b8a_bfbe_879c8882b1b1"
      unitRef="Holding">114</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048896Member"
      decimals="INF"
      id="h_23_ae676b19_d27f_42ca_985d_564cc48949da"
      unitRef="USD">1464185</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048896Member"
      decimals="4"
      id="h_24_41c37b10_1561_4ed8_aa90_7ac4c78d2f9a"
      unitRef="pure">0.85</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_15_b3851efa_e915_4b6c_8350_8bb0c623c4af">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fox Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dillard&#x2019;s, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mattel, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lyft, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Gap (The), Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;SharkNinja, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lithia Motors, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Macy&#x2019;s, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lululemon Athletica, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Sirius XM Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274391.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048896Member"
      id="t_19_8c7c0249_7525_4c3a_8197_3b40f783cc58">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fox Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dillard&#x2019;s, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mattel, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lyft, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Gap (The), Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;SharkNinja, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lithia Motors, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Macy&#x2019;s, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lululemon Athletica, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Sirius XM Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_FoxCorpClassAMember"
      decimals="4"
      id="h_25_3a4fa634_5f0f_4e1d_b170_798f49496764"
      unitRef="pure">0.017</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_DillardSIncClassAMember"
      decimals="4"
      id="h_26_217cdd71_4eb4_4550_b381_26c4be7fe3c1"
      unitRef="pure">0.017</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_MattelIncMember"
      decimals="4"
      id="h_27_1bc01211_5c18_4361_bcee_aaacbab99f65"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_LyftIncClassAMember"
      decimals="4"
      id="h_28_f93aabbc_4b06_4c77_b6a4_7d5b7b54d596"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_GapTheIncMember"
      decimals="4"
      id="h_29_65e2d3eb_4c94_4f8c_bde2_ffffce6b8c1f"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_SharkNinjaIncMember"
      decimals="4"
      id="h_30_9d9c25c4_dbdc_41be_80bf_1dc0aa987e58"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_LithiaMotorsIncMember"
      decimals="4"
      id="h_31_d3e56f26_3099_415e_a5df_678d8ea103d4"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_MacySIncMember"
      decimals="4"
      id="h_32_fc6e65bb_7349_4b65_9849_33dddb65eafb"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_LululemonAthleticaIncMember"
      decimals="4"
      id="h_33_d0c219e8_00e0_46fa_b683_6e429e90e2ac"
      unitRef="pure">0.016</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048896Member_SiriusXMHoldingsIncMember"
      decimals="4"
      id="h_34_b11a4efa_33bc_4060_b2c2_5bcfe07a6620"
      unitRef="pure">0.015</oef:PctOfTotalInv>
    <oef:ClassName
      contextRef="FY2026_C000048897Member"
      id="t_31_276150dd_74ad_1bb8_75d7_02d1ef1a413d">First Trust Consumer Staples AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000048897Member"
      id="t_32_f1b9780a_3b5a_965c_ef35_55786566722a">First Trust Consumer Staples AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000048897Member"
      id="t_33_40b66cad_33aa_4027_5052_68469b8ad08b">FXG</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_16_2fdf2b3e_73a6_4249_9eca_b12f4c1750bf">This annual shareholder report contains important information about the First Trust Consumer Staples AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000048897Member"
      id="t_17_7e92fc18_1bf0_45f7_ba96_bc93c23111b6">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_18_466a2dcc_8624_4996_be47_4ead53e01901">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXG&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048897Member"
      id="t_20_9153d407_9840_4aee_bc78_370f1fff3ce9">www.ftportfolios.com/fund-documents/etf/FXG</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048897Member"
      id="t_21_bd57051a_1cc3_4aa1_b27b_d8f43cba888c">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048897Member"
      id="t_19_6b65a850_3ab2_4255_a35e_ffb2c488f002">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_22_bd216cf8_5c35_463e_b5df_b6fdfdf8be5c">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Consumer Staples AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;66&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048897Member"
      decimals="INF"
      id="h_35_3ce2edb3_642c_4b09_9948_5e48e21b196c"
      unitRef="USD">66</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048897Member"
      decimals="4"
      id="h_36_acccd09b_aa83_4797_82b3_374d2471ccb0"
      unitRef="pure">0.0064</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_23_f8c68684_3a8b_4a9f_a9ac_9df18814de89">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 4.71% during the 12 months ended July 31, 2026. The Fund underperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Staples Index, which returned 10.32% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Food Products industry received the greatest allocation of any industry with an average weight of 48.6% and contributed &#x2013;1.3% to the Fund&#x2019;s overall return, which was the most negative return contribution&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of any industry. With an average weight of 18.1%, investments in the Beverages industry contributed 2.4% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_24_5fc9c40e_6ad9_4410_b1c7_828ce993b112">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274339.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_25_6e5674bb_86f3_4fa8_8943_7c17a27bd224">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Consumer Staples AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Staples Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Staples Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Consumer Staples Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_26_1419eede_13c9_4d4d_b80b_219a41247a53">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXG&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      id="t_28_b0423967_92de_4008_afa4_7f5ae6102a6f">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      id="t_29_fc1449a2_2c3a_467a_aa89_7ed703026a78">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;229,274,437&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;42&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,267,678&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048897Member"
      decimals="INF"
      id="h_55_1509caff_54f1_4d5b_b8c0_816a94e26cc0"
      unitRef="USD">229274437</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048897Member"
      decimals="INF"
      id="h_56_1cec380f_8d9b_4669_a0c2_7a52ceab4c5c"
      unitRef="Holding">42</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048897Member"
      decimals="INF"
      id="h_57_0554b6db_ef94_45b6_96da_da38caf572ca"
      unitRef="USD">1267678</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048897Member"
      decimals="4"
      id="h_58_61df61f1_b655_4df8_8f9f_6d583dd54fb9"
      unitRef="pure">0.95</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_30_4553869c_567f_488c_89e0_63fccfcca7fc">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;JBS N.V., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Smithfield Foods, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ingredion, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;General Mills, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;McCormick &amp;amp; Co., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Freshpet, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Seaboard Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Pilgrim&#x2019;s Pride Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Casey&#x2019;s General Stores, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Post Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274349.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048897Member"
      id="t_34_4cfd70bf_0077_4d01_42c2_9d9ae78da862">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;JBS N.V., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Smithfield Foods, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ingredion, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;General Mills, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;McCormick &amp;amp; Co., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Freshpet, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Seaboard Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Pilgrim&#x2019;s Pride Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Casey&#x2019;s General Stores, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Post Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      contextRef="FY2026_C000048898Member"
      id="t_52_146d1128_2738_999b_c8c7_8a09c99b952d">First Trust Energy AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000048898Member"
      id="t_53_96a22ad1_8499_7cc0_b899_716f0712d17f">First Trust Energy AlphaDEX&#xae; Fund</oef:FundName>
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      contextRef="FY2026_C000048898Member"
      id="t_54_c60fb72a_46c9_7c96_22ba_18f2188c0c16">FXN</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_31_427e195e_6cf4_409a_ae63_4be03b15875a">This annual shareholder report contains important information about the First Trust Energy AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000048898Member"
      id="t_32_3d8abb56_1752_43fc_b7e7_a88b14f8537f">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2026_C000048898Member"
      id="t_33_33fbb9c6_7d90_4033_bea1_7b0289e3590e">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXN&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048898Member"
      id="t_35_cf92b2be_4b16_4f70_94aa_23919d150417">www.ftportfolios.com/fund-documents/etf/FXN</oef:AddlInfoWebsite>
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      contextRef="FY2026_C000048898Member"
      id="t_36_730f3680_c2bb_436b_bf7f_f8975b5b73f5">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048898Member"
      id="t_34_d1644795_8cc8_4494_bca5_31b6f23b4a56">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_37_c715799e_15ea_48a4_aa68_ea19c4ef814b">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Energy AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048898Member"
      decimals="INF"
      id="h_69_3fe979c4_2d70_4e06_bb10_d91ec75bc7ef"
      unitRef="USD">75</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048898Member"
      decimals="4"
      id="h_70_96be7e0a_a8d9_4ab8_8a86_9e30fe9154cf"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_38_d55b42fc_dc9f_484c_8cec_c4d9cf28c323">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 43.00% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Energy Index, which returned 41.17% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Oil, Gas &amp;amp; Consumable Fuels industry received the greatest allocation of any industry with an average weight of 80.4% and contributed 32.7% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. With an average weight of 0.1%, investments in the Electrical Equipment industry contributed &#x2013;0.2% to the Fund&#x2019;s overall return, which was the most negative contribution of any industry.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_39_5fe657d5_1d57_41f2_944e_20a06d8dd09d">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274423.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_40_b694f647_29da_446a_8249_9d805a8a033c">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Energy AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;43.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Energy Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;44.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;20.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Energy Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;41.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;23.99&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Energy Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;40.15&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;22.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_41_03cf997f_3974_459b_bad1_57fdf37d2b7a">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXN&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000048898Member"
      id="t_42_783e8196_88fe_4ea9_a9e1_5683ff795e8a">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000048898Member"
      id="t_43_8d909fc8_d20b_4da2_bcf3_b455be42728e">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_44_a4b85014_91ac_4c42_906d_493b4542a1bd">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;379,138,406&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;40&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;2,620,187&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048898Member"
      decimals="INF"
      id="h_89_f4c26ae7_eba8_4796_ad57_61a3cd3f288b"
      unitRef="USD">379138406</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_90_e4efd18b_9237_4fbb_a83d_8b2fd381f44b"
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      decimals="INF"
      id="h_91_c8b36ea3_be15_4512_ae6b_a0d5b51ddafe"
      unitRef="USD">2620187</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048898Member"
      decimals="4"
      id="h_92_abae6730_14eb_4144_860e_e3c62b132526"
      unitRef="pure">0.77</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048898Member"
      id="t_45_b8e5b0f3_b0b3_4d5e_be76_ce97194ee933">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;HF Sinclair Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;APA Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Devon Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Range Resources Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Expand Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Antero Resources Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EQT Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Chord Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ovintiv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274433.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
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      contextRef="FY2026_C000048898Member"
      id="t_55_c4434946_97fc_d395_29f0_321b06c449f9">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;HF Sinclair Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;APA Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Devon Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Range Resources Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Expand Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Antero Resources Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EQT Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Chord Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ovintiv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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      contextRef="FY2026_C000048899Member"
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      contextRef="FY2026_C000048899Member"
      id="t_46_2bcc4197_13c5_4de8_84d7_8d146f65e069">This annual shareholder report contains important information about the First Trust Financials AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000048899Member"
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      contextRef="FY2026_C000048899Member"
      id="t_48_14aa54dc_6913_4995_8d46_e633375c845e">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXO&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
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      contextRef="FY2026_C000048899Member"
      id="t_51_3f8e0714_9f46_466c_a271_7665e6025716">1-800-621-1675</oef:AddlInfoPhoneNumber>
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      contextRef="FY2026_C000048899Member"
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      contextRef="FY2026_C000048899Member"
      id="t_52_86bbf9be_ec6d_4773_a1c5_c91cc60e59e0">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Financials AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;66&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
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      id="t_53_5fe7bbb9_1275_4d2c_aff5_adb04fe400e4">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 17.93% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Financials Index, which returned 10.52% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Insurance industry received the greatest allocation of any industry with an average weight of 34.2% and contributed 6.2% to the Fund&#x2019;s overall return. With an average weight of 27.6%, investments in the Banks industry contributed 8.0% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. No industry had a negative contribution to overall Fund return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      id="t_54_05481323_eb0d_41d3_bae6_eb2d115b612e">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274465.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
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      id="t_55_d8bbc7c0_ac78_4503_96a3_6568bb60918f">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Financials AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;17.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Financials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.07&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Financials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Financials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_56_01a26002_534d_4d39_86a2_0034a4598c6e">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXO&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000048899Member"
      id="t_57_4cfc1249_c68c_47ca_94d0_bf9fb49f672f">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000048899Member"
      id="t_58_30cbdb37_b3fa_454e_82fa_538fdd003721">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048899Member"
      id="t_59_d13d8171_25ec_4bb4_a9f7_df43a98801a9">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,128,685,877&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;106&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;8,561,297&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048899Member"
      decimals="INF"
      id="h_123_8860c125_da9a_43c7_a39f_44e707a960b1"
      unitRef="USD">1128685877</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048899Member"
      decimals="INF"
      id="h_124_4c7f8b3e_2256_40b0_bc73_29105e11d8e4"
      unitRef="Holding">106</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048899Member"
      decimals="INF"
      id="h_125_45a7faa2_38ad_4a9a_a789_5ab9a1309654"
      unitRef="USD">8561297</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048899Member"
      decimals="4"
      id="h_126_53afb89c_99f2_4411_a7c4_6b15dc8873be"
      unitRef="pure">0.70</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048899Member"
      id="t_60_e4b5a00d_25ca_4a8e_9f8a_294ec9138ce6">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;MarketAxess Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lincoln National Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;FactSet Research Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Allstate (The) Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;First American Financial Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Central BanCo, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Hartford Insurance Group (The), Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;MGIC Investment Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;American International Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274475.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048899Member"
      id="t_63_5327e7a4_bd86_414d_b9ee_200aee19dfef">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;MarketAxess Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lincoln National Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;FactSet Research Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Allstate (The) Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;First American Financial Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Central BanCo, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Hartford Insurance Group (The), Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;MGIC Investment Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;American International Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      contextRef="TI20260731_C000048899Member_LincolnNationalCorpMember"
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      id="h_128_8316ba8b_0802_4d2d_ac2b_7e8421a5a076"
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      contextRef="TI20260731_C000048899Member_FactSetResearchSystemsIncMember"
      decimals="4"
      id="h_129_9646cb38_c062_42b5_927f_1f3131c5f6b0"
      unitRef="pure">0.018</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048899Member_TravelersTheCosIncMember"
      decimals="4"
      id="h_130_4b4213bf_6101_4980_a840_19af5adcda06"
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      contextRef="TI20260731_C000048899Member_AllstateTheCorpMember"
      decimals="4"
      id="h_131_aecd40b1_5fbc_4226_8712_c27229dfa677"
      unitRef="pure">0.017</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048899Member_FirstAmericanFinancialCorpMember"
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      id="h_132_9d588df7_9652_4292_b749_2dac9c621f9c"
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      id="h_133_ebab7854_1e95_40ca_ae04_532b33bf4d92"
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      contextRef="TI20260731_C000048899Member_HartfordInsuranceGroupTheIncMember"
      decimals="4"
      id="h_134_894f8025_b167_4917_8211_4163e5032143"
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      id="h_135_563f74de_8bcf_43cb_9c6a_454d9b85e57a"
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      decimals="4"
      id="h_136_c47396c6_02b3_4399_8901_ccb925ee9b0c"
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    <oef:ClassName
      contextRef="FY2026_C000048900Member"
      id="t_78_15c978ed_52fb_32f3_1059_4ac8d2939210">First Trust Health Care AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000048900Member"
      id="t_79_e10c723d_db45_6778_8855_c19c11188dc6">First Trust Health Care AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000048900Member"
      id="t_77_302ce9e6_f17c_f673_5f9e_471788649dc6">FXH</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_61_54793140_f3fe_473a_a89b_0cb40afd4cfb">This annual shareholder report contains important information about the First Trust Health Care AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000048900Member"
      id="t_62_14562a13_ccd8_40aa_95df_4d3482e4aea2">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_63_c6fcf7d1_4352_4573_beb0_27a01950ee38">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXH&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048900Member"
      id="t_65_af497bb2_d00a_4df8_8f47_566f5233416a">www.ftportfolios.com/fund-documents/etf/FXH</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048900Member"
      id="t_66_e7e7c706_2fcd_4a03_91ca_2a7a57af6edf">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048900Member"
      id="t_64_ca7e6a25_ffe8_4006_ae50_63947a474abc">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_67_ba876b76_cae8_4098_b779_1d33acf43c3e">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Health Care AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;71&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048900Member"
      decimals="INF"
      id="h_137_34ecaa31_22b1_4bf8_a716_4db9d5bfeaa5"
      unitRef="USD">71</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048900Member"
      decimals="4"
      id="h_138_77d20b01_2907_4b5d_87cd_6c354358a0f6"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_68_7b2a0a5f_6149_444d_a8d2_159ba8aadbe8">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 29.63% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Health Care Index, which returned 26.92% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Biotechnology industry received the greatest allocation of any industry with an average weight of 26.4% and contributed 10.1% to the Fund&#x2019;s overall return. With an average weight of 25.0%, investments in the Health Care Providers &amp;amp; Services industry contributed 12.4% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. With an average weight of 2.0%, investments in the Health Care Technology industry contributed &#x2013;0.9% to the Fund&#x2019;s overall return, which was the most negative return contribution of any industry.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_69_956bd255_b4a7_4d00_be6e_d12b03cd927b">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274507.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_70_ed56a2b8_544a_469d_b5e5_78ba150ca191">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Health Care AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;29.63&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Health Care Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;30.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Health Care Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;26.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Health Care Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;26.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_156_16076d9f_5f68_45d1_b4ed_f217d9f6f7fb"
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_71_a596fedb_f161_4dae_ad7b_956e6dd32579">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXH&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000048900Member"
      id="t_72_247ecf87_5e19_4237_b090_b3100ba089a9">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000048900Member"
      id="t_73_d91c34b0_7457_478a_9770_125283d6c288">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_74_ad7289fe_a5e9_473e_a323_745bd0418595">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,054,221,358&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;75&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;4,569,417&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;124&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048900Member"
      decimals="INF"
      id="h_157_c60a80de_1fd5_4684_b0d0_73c81b85803b"
      unitRef="USD">1054221358</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_158_3d6c3005_b228_4827_b71f_f3657853d400"
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      decimals="INF"
      id="h_159_c4830250_2c32_46d2_b8b0_e767cb3de90b"
      unitRef="USD">4569417</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048900Member"
      decimals="4"
      id="h_160_934909a9_d0b1_46ba_9d94_541ded27c20e"
      unitRef="pure">1.24</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_75_a4c88311_5295_4c34_9db2_74de7d29184e">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Regeneron Pharmaceuticals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Universal Health Services, Inc., Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Solventum Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Boston Scientific Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Zimmer Biomet Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Guardant Health, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;DaVita, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Pfizer, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Tenet Healthcare Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cigna Group (The)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274517.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048900Member"
      id="t_80_3726312e_21b5_3e1b_26ef_1f672b28e9ce">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Regeneron Pharmaceuticals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Universal Health Services, Inc., Class B&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Solventum Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Boston Scientific Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Zimmer Biomet Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Guardant Health, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;DaVita, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Pfizer, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Tenet Healthcare Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cigna Group (The)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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      id="h_164_7ce72ac5_b9a8_4f3f_ab9c_a7455d269999"
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      contextRef="TI20260731_C000048900Member_ZimmerBiometHoldingsIncMember"
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      id="h_165_70fc070e_551d_4c44_9166_83e846841c1c"
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      contextRef="TI20260731_C000048900Member_GuardantHealthIncMember"
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      id="h_166_54a95e88_2175_46db_a426_83d30b65e150"
      unitRef="pure">0.024</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048900Member_DaVitaIncMember"
      decimals="4"
      id="h_167_f11e5c4c_9694_4459_9054_9b7b676a62cf"
      unitRef="pure">0.024</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048900Member_PfizerIncMember"
      decimals="4"
      id="h_168_db23c4dc_64bd_4b8e_9d25_3f3635cfe3dd"
      unitRef="pure">0.024</oef:PctOfTotalInv>
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      id="h_169_cb101c10_a6ac_4996_ac90_307e72eb76af"
      unitRef="pure">0.023</oef:PctOfTotalInv>
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      decimals="4"
      id="h_170_4595696e_aa6c_45b8_96ed_f920dfbc2877"
      unitRef="pure">0.023</oef:PctOfTotalInv>
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    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_78_962cfff7_0974_4e7a_a9e3_6dcfa442fef1">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXR&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048901Member"
      id="t_80_89a5b285_f743_48c9_a8d5_a2da4a034ddb">www.ftportfolios.com/fund-documents/etf/FXR</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048901Member"
      id="t_81_72fcb776_7641_4cd1_bc8d_62a0abdbbf40">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048901Member"
      id="t_79_f171ebd9_2a66_4461_b83c_04b4b84eb934">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_82_9b19389c_e6f8_4b48_af52_fe235a864996">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Industrials/Producer Durables AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;67&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048901Member"
      decimals="INF"
      id="h_171_9fe74a43_a9b6_474f_9090_b2550d9bbbe7"
      unitRef="USD">67</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048901Member"
      decimals="4"
      id="h_172_3a5a6cc2_8d93_45b6_9d9e_692520dc5f48"
      unitRef="pure">0.0062</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_83_8c6a7a6f_786f_45ee_81c6_ccf9a3ce9a6d">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 15.16% during the 12 months ended July 31, 2026. The Fund underperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Industrials Index, which returned 19.86% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Machinery industry received the greatest allocation of any industry with an average weight of 14.6% and contributed 3.6% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. With an average weight of 8.3%, investments in the Financial Services industry contributed &#x2013;1.6% to the Fund&#x2019;s overall return, which was the most negative return contribution of any industry.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_84_37214380_5247_4793_9a27_63459ff29237">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274549.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_85_de423316_e5df_4511_9db3_8fbf96feaf8b">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Industrials/Producer Durables AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Industrials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Industrials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Industrials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.89&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_C000048901Member"
      id="t_95_0265b8e7_463e_7da7_9d8e_aad464a5a575">First Trust Industrials/Producer Durables AlphaDEX&#xae; Fund</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_C000048901Member"
      decimals="4"
      id="h_173_e4f82d54_c42c_49d4_8f6b_6efa8cb067a6"
      unitRef="pure">0.1516</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_C000048901Member"
      decimals="4"
      id="h_174_c24ba3ff_8114_4403_bbc9_19da6ded637b"
      unitRef="pure">0.0904</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_C000048901Member"
      decimals="4"
      id="h_175_267c370e_f28e_4fa1_99d4_a260fec4f324"
      unitRef="pure">0.1272</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_StrataQuantIndustrialsIndexMember"
      id="t_96_2ba720b9_ff6d_9b30_c2a6_25e54e422a5f">StrataQuant&#xae; Industrials Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_StrataQuantIndustrialsIndexMember"
      decimals="4"
      id="h_176_745685d2_091e_4279_9e52_f23986088732"
      unitRef="pure">0.1577</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_StrataQuantIndustrialsIndexMember"
      decimals="4"
      id="h_177_4bc28e23_52dc_4c4c_a942_bd7f8df61b02"
      unitRef="pure">0.0974</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_StrataQuantIndustrialsIndexMember"
      decimals="4"
      id="h_178_90cb14a0_eead_444c_9c31_e0f38496cab5"
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      id="h_189_192aac5e_722e_433c_82ad_6fd3fb1a2e0f"
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    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell3000IndexMember"
      decimals="4"
      id="h_190_0b6b4db5_d99f_4cf9_84fe_59ad6bb705ae"
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_86_c6a7a22f_a528_4e5f_8264_5f8bd5f6c7b5">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXR&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000048901Member"
      id="t_87_e696e4a8_706d_48db_8b69_3610344a5542">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_88_889983f9_d6ef_48a6_8d97_bcfaa2c45eb8">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_89_b6bf5731_121a_41d7_9a63_fb45d43c65d7">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;741,607,839&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;157&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;5,684,364&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;74&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048901Member"
      decimals="INF"
      id="h_191_acaff5c1_ab41_4f4a_adef_0ac5e75cf6cc"
      unitRef="USD">741607839</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048901Member"
      decimals="INF"
      id="h_192_e9c5006a_b781_414d_9a86_50d71d2c6e64"
      unitRef="Holding">157</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048901Member"
      decimals="INF"
      id="h_193_8c7b8324_0928_4f33_a22d_05e4f3b3dc95"
      unitRef="USD">5684364</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048901Member"
      decimals="4"
      id="h_194_11d9965f_faae_4378_a1dc_27699910f0c2"
      unitRef="pure">0.74</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_90_b74cd8fe_4486_423e_b848_29073dca5155">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Genpact Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ADT, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Vontier Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fiserv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ExlService Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Graphic Packaging Holding Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mohawk Industries, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274559.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048901Member"
      id="t_94_0c6e7e7d_7f02_1595_32d3_ce6b714b372e">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Genpact Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ADT, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Vontier Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fiserv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ExlService Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Graphic Packaging Holding Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mohawk Industries, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_AccenturePLCClassAMember"
      decimals="4"
      id="h_195_70c8b7ac_1242_4fa2_a8b6_8981de5972a9"
      unitRef="pure">0.015</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_PayPalHoldingsIncMember"
      decimals="4"
      id="h_196_94c9f9dc_4cab_4d7c_a199_0eb77e01af4e"
      unitRef="pure">0.015</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_GenpactLtdMember"
      decimals="4"
      id="h_197_8a2bc92a_af1d_4e23_b985_207a26023129"
      unitRef="pure">0.014</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_ADTIncMember"
      decimals="4"
      id="h_198_d6fadbda_eea6_41b2_aa22_2724066999fd"
      unitRef="pure">0.013</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_FidelityNationalInformationServicesIncMember"
      decimals="4"
      id="h_199_65e90082_75d5_490f_b2bb_fd725fe9fb68"
      unitRef="pure">0.013</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_VontierCorpMember"
      decimals="4"
      id="h_200_f1c7c753_907a_44de_b24b_91f476d3f99a"
      unitRef="pure">0.012</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_FiservIncMember"
      decimals="4"
      id="h_201_2f630be3_17e2_491b_af79_7873cddbbed0"
      unitRef="pure">0.012</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_ExlServiceHoldingsIncMember"
      decimals="4"
      id="h_202_5d8668dc_4f43_4073_aded_bc4de778fca0"
      unitRef="pure">0.012</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_GraphicPackagingHoldingCoMember"
      decimals="4"
      id="h_203_ef53c60a_f14b_4ab0_958c_06d59807c06b"
      unitRef="pure">0.011</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048901Member_MohawkIndustriesIncMember"
      decimals="4"
      id="h_204_cdc1a6f3_8024_4668_8712_62bf8538398f"
      unitRef="pure">0.011</oef:PctOfTotalInv>
    <oef:ClassName
      contextRef="FY2026_C000048902Member"
      id="t_106_67bae25d_a87a_53d5_7255_01f686025d68">First Trust Materials AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000048902Member"
      id="t_107_02c5a320_9122_5deb_d446_80be5e05c53a">First Trust Materials AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000048902Member"
      id="t_108_b1e41773_caeb_1cc3_699a_92d5bbdcd929">FXZ</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_91_ce58a04a_5684_41ef_abfc_e2d170d03a2c">This annual shareholder report contains important information about the First Trust Materials AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000048902Member"
      id="t_92_535d5294_8dd4_440b_ade6_ed53514c0a50">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_93_a1cf800a_5d13_4159_93c2_896359420c4d">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXZ&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048902Member"
      id="t_95_64449eb0_3c78_4e97_ac46_683510c19438">www.ftportfolios.com/fund-documents/etf/FXZ</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048902Member"
      id="t_96_6636d825_c162_4321_b9bf_cb3d19eab674">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048902Member"
      id="t_94_b099a9f8_f5cd_464e_aa79_b6c84948639f">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_97_3b3de198_2529_4569_aea4_7f31ca405710">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Materials AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;75&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048902Member"
      decimals="INF"
      id="h_205_d8bffdee_4a07_405f_9d59_4f4381e94641"
      unitRef="USD">75</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048902Member"
      decimals="4"
      id="h_206_fcb9da01_dac4_4fb5_9be3_6521822d38af"
      unitRef="pure">0.0064</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_98_aaaa9ba4_9333_48fc_a8cc_e4ecc2671cba">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 35.49% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Materials Index, which returned 15.32% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Chemicals industry received the greatest allocation of any industry, with an average weight of 40.9%, and contributed 4.7% to the Fund&#x2019;s overall return. With an average weight of 37.1%, investments in the Metals &amp;amp; Mining industry contributed 20.8% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. No industry had a negative contribution to overall Fund return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_99_74a8886e_d3e1_4b6d_8af7_d72b54907add">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274591.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_100_22e9686a_bca3_4413_9979_591a1fa93c0f">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Materials AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;35.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Materials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;36.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Materials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.53&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Basic Materials Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;25.52&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_103_616cfe11_9d82_4818_8e78_c22a5fe72c09">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      id="t_104_28c1a173_8bd2_4321_852b_ed657ec09324">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;368,177,305&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;41&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,483,638&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048902Member"
      decimals="INF"
      id="h_225_36ecb95b_a767_49e7_9e36_d53276130cc6"
      unitRef="USD">368177305</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048902Member"
      decimals="INF"
      id="h_226_14d5ecec_4b4e_493f_a7c0_cc8912ee6b90"
      unitRef="Holding">41</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048902Member"
      decimals="INF"
      id="h_227_4e8f52db_67de_45a0_9a47_7e75b6781d14"
      unitRef="USD">1483638</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048902Member"
      decimals="4"
      id="h_228_db9e44d0_7cda_4868_8889_c141368011c6"
      unitRef="pure">0.73</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_105_54d7dd1b_0042_428f_89b5_ca2693c49a96">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CF Industries Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Steel Dynamics, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Newmont Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Anglogold Ashanti PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Coeur Mining, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Alcoa Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Nucor Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mueller Industries, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Eastman Chemical Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mosaic (The) Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274601.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048902Member"
      id="t_109_b80604f4_b535_8a26_dc38_c6be1521c083">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CF Industries Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Steel Dynamics, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Newmont Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Anglogold Ashanti PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Coeur Mining, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Alcoa Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Nucor Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mueller Industries, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Eastman Chemical Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Mosaic (The) Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048902Member_CFIndustriesHoldingsIncMember"
      decimals="4"
      id="h_229_4e9d7968_71b4_4b37_b7c6_9df812ad73bb"
      unitRef="pure">0.056</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048902Member_SteelDynamicsIncMember"
      decimals="4"
      id="h_230_490f8df1_d6e6_435a_9cbd_d129f8eb4ccc"
      unitRef="pure">0.053</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048902Member_NewmontCorpMember"
      decimals="4"
      id="h_231_d25da53a_1736_4fb5_82e2_9cb5da95cd3b"
      unitRef="pure">0.049</oef:PctOfTotalInv>
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    <oef:ClassName
      contextRef="FY2026_C000048903Member"
      id="t_121_4e3b985c_b0a4_66da_372b_7a4f2993c029">First Trust Technology AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000048903Member"
      id="t_122_9f4fc4be_919f_d7ba_5084_192a9c165904">First Trust Technology AlphaDEX&#xae; Fund</oef:FundName>
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      contextRef="FY2026_C000048903Member"
      id="t_123_2b281d9c_1e27_11a4_69a5_74a74e5d4fde">FXL</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_106_f156e1f0_9e44_485f_bb04_5d5a6a4a4840">This annual shareholder report contains important information about the First Trust Technology AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000048903Member"
      id="t_107_687d4e89_c061_4431_8ef2_ac6ebb926189">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_108_49d2b15e_bf6a_4925_9ae5_c90e30e5c272">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXL&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048903Member"
      id="t_110_9885ad0e_4f2a_4fea_b147_45502a2b3cb2">www.ftportfolios.com/fund-documents/etf/FXL</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048903Member"
      id="t_111_9afe702a_02c7_4329_8ea2_9bcca7efd682">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048903Member"
      id="t_109_eb5b4a59_559d_4207_98f4_05358b1fc429">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_112_483ef9aa_fd7c_4cd1_9c8f_4b8888ff5f67">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Technology AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;69&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048903Member"
      decimals="INF"
      id="h_239_ae421bfc_966f_47af_b7e5_b561b41d9b00"
      unitRef="USD">69</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048903Member"
      decimals="4"
      id="h_240_3325cbe3_2190_4d3a_90c7_958c5ff6783a"
      unitRef="pure">0.0061</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_113_3c139a27_09d2_4cc3_839f_1ad17c7667f7">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 24.65% during the 12 months ended July 31, 2026. The Fund underperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Information Technology Index, which returned 26.22% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Semiconductors &amp;amp; Semiconductor Equipment industry received the greatest allocation of any industry with an average weight of 29.0% and contributed 23.8% to the Fund&#x2019;s overall return, which was the greatest return contribution of any industry. With an average weight of 8.3%, investments in the Professional Services industry contributed -2.4% to the Fund&#x2019;s overall return, which was the most negative return contribution of any industry.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_114_4ad6aa74_1c18_4847_ab1f_6227aee7d0c2">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274633.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_115_d540730d_cbec_436c_adb8_f7adf7cd477f">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Technology AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;24.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant Technology&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;25.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;20.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Information Technology Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;26.22&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;20.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;25.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Technology Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;26.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;25.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_116_af233e4c_352b_4a37_bf87_d97c82d2b412">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXL&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000048903Member"
      id="t_117_ddb65523_7215_4c3d_a313_87e94280bce1">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000048903Member"
      id="t_118_f8a964d3_f7f2_4593_a274_529816b9e622">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_119_513d4f96_9412_4c0e_9f07_5778eab9d6b1">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;2,569,937,525&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;112&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;7,736,247&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;112&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
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      contextRef="TI20260731_C000048903Member"
      decimals="INF"
      id="h_259_c484e3a3_13db_4c3a_8ec6_81c3581ab8d3"
      unitRef="USD">2569937525</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_260_8c78f676_6e87_4672_bf16_678adc1bf58a"
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      id="h_261_0aa27770_78ea_4cf5_8b8d_f116f80d10c4"
      unitRef="USD">7736247</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048903Member"
      decimals="4"
      id="h_262_6df0723e_cfdb_4aa6_951b_87d96e288729"
      unitRef="pure">1.12</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_120_3bb01bc6_5777_411f_a6ce_c1e5cdd6ef17">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EPAM Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PTC, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Leidos Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Zoom Communications, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Amdocs Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Adobe, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dell Technologies, Inc., Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;RingCentral, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Western Digital Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274643.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048903Member"
      id="t_124_f1c21271_1310_f9ed_1752_2dd5f7eebac7">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EPAM Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PTC, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Leidos Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Zoom Communications, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Amdocs Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Adobe, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dell Technologies, Inc., Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;RingCentral, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Western Digital Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      id="h_263_727b0cb2_ab23_4c2e_9d79_1c41fafc1274"
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      contextRef="TI20260731_C000048903Member_EPAMSystemsIncMember"
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      id="h_264_7a51a839_d259_49e0_a97b_03df2b8274e2"
      unitRef="pure">0.022</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048903Member_PTCIncMember"
      decimals="4"
      id="h_265_2807a1e7_f6e3_4d38_8bab_8467bc91e1ac"
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      contextRef="TI20260731_C000048903Member_LeidosHoldingsIncMember"
      decimals="4"
      id="h_266_9ca36c04_1500_4498_9bb9_5388de690bc5"
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      id="h_267_0db9ffb0_56a4_4e93_a79e_c1f39ff8cc69"
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      id="h_268_7ffd0834_e76a_4943_8645_d5be01c1276d"
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      contextRef="TI20260731_C000048903Member_AdobeIncMember"
      decimals="4"
      id="h_269_7226d21f_d1a5_4c81_a61c_a691ac0ad34e"
      unitRef="pure">0.016</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048903Member_DellTechnologiesIncClassCMember"
      decimals="4"
      id="h_270_92ee304a_8181_4b8d_afe6_a8b0c1570545"
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      id="h_271_f4a8dd57_f1e1_4b2d_8a89_6f87d48d86ef"
      unitRef="pure">0.014</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048903Member_WesternDigitalCorpMember"
      decimals="4"
      id="h_272_4435d1b3_41bf_4600_9c3e_58e88c2a2f21"
      unitRef="pure">0.014</oef:PctOfTotalInv>
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      contextRef="FY2026_C000048904Member"
      id="t_138_2515c828_e7a4_bdc0_aa60_e6431d0638b6">First Trust Utilities AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000048904Member"
      id="t_121_3d528ea4_7cb9_4a6f_90c3_bffc31e59906">This annual shareholder report contains important information about the First Trust Utilities AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000048904Member"
      id="t_122_a2805e16_247d_4ff8_a95e_62e8d5d1976d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2026_C000048904Member"
      id="t_123_22749f3b_a42c_4092_b7ba_dbf4e1f9c4be">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FXU&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048904Member"
      id="t_125_2aaad46a_a2b9_4b50_9692_a93b469ed964">www.ftportfolios.com/fund-documents/etf/FXU</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048904Member"
      id="t_126_61c39013_04a5_470e_a410_640d54edd021">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048904Member"
      id="t_124_22b3e66a_071f_4f15_b021_bd7a46b54055">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_127_37fb183a_c090_4b00_a1ad_2e36a00f63aa">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Utilities AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;65&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.61&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_273_8701c273_2c06_49fa_b14c_c01f9c6a995e"
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    <oef:ExpenseRatioPct
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      id="h_274_e5eca6c3_4041_4afd_b417_a847f1bfe776"
      unitRef="pure">0.0061</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_128_5a817650_7282_423d_865c_13a446a341e4">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 11.49% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Utilities Index, which returned 6.41% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Electric Utilities industry received the greatest allocation of any industry with an average weight of 50.3% and contributed 7.8% to the Fund's overall return, which was the greatest return contribution of any industry. No industry had a negative contribution to overall Fund return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_129_01e13cea_c8f5_4f47_b916_acacd676108b">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274675.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_130_6319d734_2921_45bb_9248_4aa3c48201ed">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Utilities AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;StrataQuant&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Utilities Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;18.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Utilities Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 1000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Utilities Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;5.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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      id="t_140_38712f19_a2f8_e022_e11d_59787bb93916">First Trust Utilities AlphaDEX&#xae; Fund</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_275_b169675d_92b9_4dc9_ab2a_33ec1611b2f0"
      unitRef="pure">0.1149</oef:AvgAnnlRtrPct>
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      id="h_277_ec9b05af_dc4e_4431_bf6c_c690cc46d920"
      unitRef="pure">0.0872</oef:AvgAnnlRtrPct>
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      id="t_141_81a3efef_7211_a561_18c5_3384b9e43100">StrataQuant&#xae; Utilities Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_278_3746becd_dc3d_49cc_8f43_41998e129a33"
      unitRef="pure">0.1223</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_279_d5295b50_a64c_4f86_b2cd_42001275a303"
      unitRef="pure">0.1288</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_StrataQuantUtilitiesIndexMember"
      decimals="4"
      id="h_280_62da874d_d48c_4807_9997_63073537190e"
      unitRef="pure">0.0945</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
      contextRef="FY2026_Russell1000IndexMember"
      decimals="4"
      id="h_281_aeb78766_ff61_437c_b722_4e22e5ce0819"
      unitRef="pure">0.1894</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_Russell1000IndexMember"
      decimals="4"
      id="h_282_6f3dd5d0_3548_44fb_980b_6a1ee59e36e8"
      unitRef="pure">0.1212</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell1000IndexMember"
      decimals="4"
      id="h_283_bdec9fae_3100_4e6a_a2f9_99290eeace4d"
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      id="t_143_ba6a5481_1d47_3b32_77f4_66405252de0f">S&amp;P 500&#xae; Utilities Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_284_afb8cf4d_46d3_4069_b2e5_a799e97dcd39"
      unitRef="pure">0.0641</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_SAndP500UtilitiesIndexMember"
      decimals="4"
      id="h_285_64076f3f_7aac_4fe3_acf7_29660074d13c"
      unitRef="pure">0.0941</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_SAndP500UtilitiesIndexMember"
      decimals="4"
      id="h_286_01f89497_2a24_442f_b885_5467e529b178"
      unitRef="pure">0.0894</oef:AvgAnnlRtrPct>
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      contextRef="FY2026_Russell1000UtilitiesIndexMember"
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    <oef:AvgAnnlRtrPct
      contextRef="FY2026_Russell1000UtilitiesIndexMember"
      decimals="4"
      id="h_287_a658a72f_1b61_45b9_bb7b_559adaa1458d"
      unitRef="pure">0.0560</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_Russell1000UtilitiesIndexMember"
      decimals="4"
      id="h_288_63133066_2c9f_402d_b4a5_07ad7caeb4da"
      unitRef="pure">0.0972</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell1000UtilitiesIndexMember"
      decimals="4"
      id="h_289_4669fa1e_ba00_4c1a_b143_15d2040c7bb8"
      unitRef="pure">0.0830</oef:AvgAnnlRtrPct>
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      contextRef="FY2026_Russell3000IndexMember"
      id="t_145_96cd50c3_8762_594d_2d85_a3ffbfe6ebbc">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_Russell3000IndexMember"
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      id="h_290_087ebdaf_16f3_4adb_a61c_280f24f2b616"
      unitRef="pure">0.1960</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_Russell3000IndexMember"
      decimals="4"
      id="h_291_9a0e3596_dd42_4377_bc3a_d020c9f4c540"
      unitRef="pure">0.1182</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell3000IndexMember"
      decimals="4"
      id="h_292_2bb90b8e_c7d8_4e3e_b948_cdadc4cd6b35"
      unitRef="pure">0.1456</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_131_23e49bc8_4d01_4db3_9479_f6a2a59c9cdd">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FXU&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000048904Member"
      id="t_132_535caa9b_3f0b_4de2_9407_47ddf396b7f2">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_133_6db82802_43be_492e_b564_637423150f55">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_134_b49824c6_3343_4419_9605_10b0c37bee2f">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;831,047,490&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;42&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;6,459,969&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048904Member"
      decimals="INF"
      id="h_293_fd19bb0b_c79e_43da_9497_ac65f44949f8"
      unitRef="USD">831047490</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048904Member"
      decimals="INF"
      id="h_294_1b91c1fd_8fa1_4c73_bc00_576a0114ca7e"
      unitRef="Holding">42</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048904Member"
      decimals="INF"
      id="h_295_6a99bc00_2135_470b_9d1c_717191d4cdbf"
      unitRef="USD">6459969</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048904Member"
      decimals="4"
      id="h_296_c178d2b7_d492_4bc5_9eea_5432a087fd34"
      unitRef="pure">0.42</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_135_0181b85f_60b1_41f5_85b9_6903f7c4df77">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;National Fuel Gas Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;UGI Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PG&amp;amp;E Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AES (The) Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Eversource Energy&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Edison International&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Consolidated Edison, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Exelon Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Essential Utilities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Duke Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274685.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048904Member"
      id="t_146_77f192a1_4958_f47f_5ab2_27ae3ef5afdb">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;National Fuel Gas Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;UGI Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PG&amp;amp;E Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AES (The) Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Eversource Energy&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Edison International&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Consolidated Edison, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Exelon Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;4.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Essential Utilities, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Duke Energy Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      decimals="4"
      id="h_298_d5e4a782_8a58_4a83_ad5c_64b2805571f0"
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      contextRef="TI20260731_C000048904Member_PGAndECorpMember"
      decimals="4"
      id="h_299_1ef41ba8_9a57_41fa_8b08_fbdfbc262c50"
      unitRef="pure">0.044</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048904Member_AESTheCorpMember"
      decimals="4"
      id="h_300_a0b918df_80d2_4947_a70f_616ef42c00bb"
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      decimals="4"
      id="h_301_7df828e0_9d3f_403c_ad4d_65b168bd4754"
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      contextRef="TI20260731_C000048904Member_EdisonInternationalMember"
      decimals="4"
      id="h_302_d9fcf493_a10a_40fb_a2f1_aea3bfe587ba"
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      contextRef="TI20260731_C000048904Member_ConsolidatedEdisonIncMember"
      decimals="4"
      id="h_303_79676327_5e29_47d7_9bcb_e0cbc55dfddf"
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      contextRef="TI20260731_C000048904Member_ExelonCorpMember"
      decimals="4"
      id="h_304_9aa14bfc_9c94_455e_833a_8762d3a61578"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048904Member_EssentialUtilitiesIncMember"
      decimals="4"
      id="h_305_cbcfbbdd_aa46_42e0_a7c8_672a41b479e2"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048904Member_DukeEnergyCorpMember"
      decimals="4"
      id="h_306_5504665a_5b6e_4706_9322_00501ae29542"
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    <oef:ClassName
      contextRef="FY2026_C000047995Member"
      id="t_158_ef14d01a_184f_a7d0_9060_906cff8f3dd5">First Trust Large Cap Core AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000047995Member"
      id="t_159_06cb9483_1b5f_19ce_453f_2c80fce558c9">First Trust Large Cap Core AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000047995Member"
      id="t_152_a169df65_0c8a_342f_0009_979c71607ae1">FEX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_136_fb306427_a41e_4f0b_936f_374ea23b10fd">This annual shareholder report contains important information about the First Trust Large Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000047995Member"
      id="t_137_aa624a5c_608e_45ad_b9c4_e858d584757b">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_138_f90a9e9a_5f96_4138_a9b6_c56cd9fe7105">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FEX&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000047995Member"
      id="t_140_aad0d778_b9b9_474b_8f2f_9cb22290a165">www.ftportfolios.com/fund-documents/etf/FEX</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000047995Member"
      id="t_141_901451a6_f7ca_4d0d_a1c4_46e11b3fc968">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000047995Member"
      id="t_139_182fda06_cb02_4b38_a27a_833c2537d4d8">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_142_0183f0ae_a686_437f_a0a1_c0c9b33b0cab">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Large Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;64&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000047995Member"
      decimals="INF"
      id="h_307_24a31369_0dc5_457d_86ba_f8f926323126"
      unitRef="USD">64</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000047995Member"
      decimals="4"
      id="h_308_f61d9b6d_6e62_4814_b7d5_c9b6a49af817"
      unitRef="pure">0.0057</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_143_44b82d67_d157_48ec_b041_11035731177e">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 23.01% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index, which returned 19.56% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Industrials sector received the greatest allocation of any sector with an average weight of 17.1%, and contributed 4.5% to the Fund&#x2019;s overall return. With an average weight of 15.1%, investments in the Information Technology sector contributed 7.9% to the Fund&#x2019;s overall return, which was the greatest contribution of any sector. With an average weight of 4.4%, investments in the Communication Services sector contributed -0.5% to the Fund&#x2019;s overall return, which was the most negative&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;contribution of any sector.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_144_fe11d3a8_bd74_4218_9873_ea0c8749bcb1">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12273877.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_145_afc732c3_4b01_4d7a_ad37_c413e82c39db">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Large Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;23.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Large Cap Core&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;23.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 500 Large Cap&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;17.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.35&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_146_69a44b59_2c6e_437e_a770_6556883d4815">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FEX&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000047995Member"
      id="t_147_5a7f2175_588a_4627_898c_aa426d9fbac2">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000047995Member"
      id="t_148_b385f256_eb57_4777_b08e_7eea584d254e">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_149_54c5c132_b7bf_4697_9818_e26fdde0ef0d">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,565,948,975&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;377&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;7,167,515&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
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      contextRef="TI20260731_C000047995Member"
      decimals="INF"
      id="h_321_1ab7f4fe_a1e1_475d_b27d_4aec88601532"
      unitRef="USD">1565948975</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_322_c2ae7d02_aed1_4914_990f_ad7be55fd425"
      unitRef="Holding">377</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
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      decimals="INF"
      id="h_323_f996d977_5b59_44d0_b40c_dc6bb54aaf6f"
      unitRef="USD">7167515</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000047995Member"
      decimals="4"
      id="h_324_101b460f_7e40_40a0_9c24_42258066184d"
      unitRef="pure">0.92</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_150_96acb4e3_633b_4494_ad95_36a9d5b1d727">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Regeneron Pharmaceuticals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Global Payments, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EOG Resources, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AT&amp;amp;T, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12273887.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000047995Member"
      id="t_154_3b03d7b0_b43c_330f_6d9e_59d29d70c42c">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Regeneron Pharmaceuticals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Global Payments, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EOG Resources, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AT&amp;amp;T, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      id="h_326_db05f429_3369_469c_bb59_3e7fa473ac7c"
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      contextRef="TI20260731_C000047995Member_PayPalHoldingsIncMember"
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      id="h_327_ad6b897a_6ca6_4d75_b9a1_cceefec84983"
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      contextRef="TI20260731_C000047995Member_RegeneronPharmaceuticalsIncMember"
      decimals="4"
      id="h_328_443f8cb3_fe3d_4df8_95ad_1e0e662566d3"
      unitRef="pure">0.006</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047995Member_ConocoPhillipsMember"
      decimals="4"
      id="h_329_343af5a9_1f81_4ec7_9bbf_fb95111ee1b6"
      unitRef="pure">0.005</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047995Member_GlobalPaymentsIncMember"
      decimals="4"
      id="h_330_df658f8c_1530_41b8_9dec_96c88e4f3444"
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      contextRef="TI20260731_C000047995Member_FidelityNationalInformationServicesIncMember"
      decimals="4"
      id="h_331_6a6e94b3_a9f8_4ed4_abc4_54b59c62af63"
      unitRef="pure">0.005</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047995Member_EOGResourcesIncMember"
      decimals="4"
      id="h_332_4b121bbf_8377_4c17_8a44_26e61e31486c"
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      contextRef="TI20260731_C000047995Member_TravelersTheCosIncMember"
      decimals="4"
      id="h_333_acc0a189_8798_4053_915f_a68d4f93aaaf"
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    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047995Member_ATAndTIncMember"
      decimals="4"
      id="h_334_2cc690e0_1d08_4e1c_bec3_369db26ff572"
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      contextRef="FY2026_C000047996Member"
      id="t_166_6143c9d1_64f3_1896_5fa6_2b757e6c1eae">First Trust Mid Cap Core AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000047996Member"
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    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000047996Member"
      id="t_151_e0b97951_384d_4ad7_8085_91289e7dfc65">This annual shareholder report contains important information about the First Trust Mid Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000047996Member"
      id="t_152_e45dd44f_5cc2_458c_88f9_0c583633b3e8">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2026_C000047996Member"
      id="t_153_7d79fb3b_4e47_4cdc_a857_98cd8944c4c7">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FNX&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000047996Member"
      id="t_155_f6e320d0_bd48_4565_bc29_2d46eaa292c9">www.ftportfolios.com/fund-documents/etf/FNX</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000047996Member"
      id="t_156_92e869a5_be6e_4eee_8bd0_7516f154f91e">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000047996Member"
      id="t_154_f3a21685_779d_4e03_a2cd_c6c62eb75db9">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000047996Member"
      id="t_157_80ed4336_26da_48f6_9927_a0cf2985e8c4">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Mid Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;64&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Excludes any Acquired Fund Fees and Expenses of the&#160;underlying investment companies in which the Fund invests.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000047996Member"
      decimals="INF"
      id="h_335_6fd3123e_46cf_4abe_9989_694707226feb"
      unitRef="USD">64</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="t_158_4330c676_4127_4d5f_a633_9aeb28071c04">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 23.25% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P MidCap 400&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index, which returned 20.92% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Industrials sector received the greatest allocation of any sector, with an average weight of 20.6%, which contributed 4.8% to Fund&#x2019;s overall return, which was the greatest of any sector. With an average weight of 4.1%, investments in the Consumer Staples sector contributed -0.3% to the Fund&#x2019;s overall return, which was the most negative return contribution&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of any sector.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      id="t_159_366bd5e7_82aa_4b53_8a09_d555e4e8c0f0">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12273919.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000047996Member"
      id="t_160_bbb3d171_1a12_4736_9532_66998d040528">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Mid Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;23.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Mid Cap Core&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;24.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 600 Mid Cap&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;21.51&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P MidCap 400&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;20.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.47&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:UpdPerfInfoLocationTextBlock
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      id="t_161_ac8b893d_9615_4471_9d69_b8fd78520d54">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FNX&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      id="t_162_37c4262f_4e78_46f3_bf15_be14b6dfffdc">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000047996Member"
      id="t_163_3294c407_499f_4f9a_a95a_7546050af670">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
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      id="t_164_93d4ab57_f0ef_4748_94ab_85f1720a6bca">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,374,486,934&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;452&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;6,226,984&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;100&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000047996Member"
      decimals="INF"
      id="h_352_cb37ff35_7362_4858_9970_2232d9e3da21"
      unitRef="USD">1374486934</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000047996Member"
      decimals="INF"
      id="h_353_aec808ea_1bff_48a7_b60d_99e943479904"
      unitRef="Holding">452</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000047996Member"
      decimals="INF"
      id="h_354_79fd0fd5_1c25_40f8_b926_89cea16b972a"
      unitRef="USD">6226984</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000047996Member"
      decimals="4"
      id="h_355_d8c3a2f0_8713_47e6_a8e6_1129caa8c8b2"
      unitRef="pure">1</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000047996Member"
      id="t_165_c7b0984d_2796_4bdc_8ef4_792f6bb21fd1">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EPAM Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lithia Motors, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;HF Sinclair Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Genpact Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;SM Energy Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ovintiv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ADT, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Permian Resources Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CF Industries Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Asbury Automotive Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12273929.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000047996Member"
      id="t_174_de6c85bc_b8f8_8e39_c882_91ad15cbc0e9">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EPAM Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lithia Motors, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;HF Sinclair Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Genpact Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;SM Energy Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ovintiv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ADT, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Permian Resources Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CF Industries Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Asbury Automotive Group, Inc.&lt;/td&gt;
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      contextRef="FY2026_C000047997Member"
      id="t_181_cd8c64f3_1c26_3ac1_e359_24a1c346d0e7">First Trust Small Cap Core AlphaDEX&#xae; Fund</oef:ClassName>
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      id="t_182_69a7d31f_5d1a_7e2a_d337_aa439fadebce">First Trust Small Cap Core AlphaDEX&#xae; Fund</oef:FundName>
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      id="t_183_da843e05_3bb6_8f1f_45e2_78b512ef49d0">FYX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_166_25cd6755_36c4_410f_aa66_dfc78501f2e4">This annual shareholder report contains important information about the First Trust Small Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000047997Member"
      id="t_167_2abdb6bc_f833_4ae9_a434_e727cd22d34d">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_168_7a7712f5_1fc3_495e_9ed7_5627f60da3ef">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FYX&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000047997Member"
      id="t_170_a7adaa2a_7758_4306_8504_55b04742aa42">www.ftportfolios.com/fund-documents/etf/FYX</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000047997Member"
      id="t_171_d76b6c54_7b11_4fbd_ab32_477a77bf6e4f">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000047997Member"
      id="t_169_89a7cf0a_85ed_4f97_be78_9256f9d57e87">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_172_d04c2b91_bbfa_49b0_88fc_91a33aaf00ca">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Small Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;70&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000047997Member"
      decimals="INF"
      id="h_366_6227ea99_0064_4a71_93c6_cf9bc1ee0607"
      unitRef="USD">70</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000047997Member"
      decimals="4"
      id="h_367_756022b1_69d4_4661_852e_bca37157ec9d"
      unitRef="pure">0.0057</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_173_eb8cf4c1_bf1f_4abe_8831_bf3f2a0889c1">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 45.58% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P SmallCap 600&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index, which returned 33.64% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Financials sector received the greatest allocation of any sector, with an average weight of 19.5%, which contributed 6.2% to the Fund&#x2019;s overall return. With an average weight of 13.7%, investments in the Health Care sector contributed 8.1% to the Fund&#x2019;s overall return, which was the greatest of any sector. No sector represented a negative contribution to the Fund&#x2019;s overall return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_174_adbef0a1_a6dc_462d_915f_482c4f625294">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12273961.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_175_910902d2_6d04_4ed3_900b_eee34857811f">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Small Cap Core AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;45.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Small Cap Core&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;46.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 700 Small Cap&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;36.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P SmallCap 600&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;33.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_176_49a11245_3d7d_4839_bf1f_510f13feec88">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FYX&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000047997Member"
      id="t_177_21d88dc3_af9c_42f5_96b4_91cca6910655">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000047997Member"
      id="t_178_bdf253da_bb9a_47e6_90ea_3b455fe3873e">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_179_1857f549_3a44_4562_9cc3_8b8283128f84">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,376,674,389&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;527&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;5,256,295&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;102&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
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      decimals="INF"
      id="h_383_b903284a_8dbe_4894_b3fb_e0bcd6ae8150"
      unitRef="USD">1376674389</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_384_15669553_58af_453d_b02d_ad0f48e66d4c"
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      id="h_385_0731ec86_0c2c_4b25_b848_7ac36b965880"
      unitRef="USD">5256295</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000047997Member"
      decimals="4"
      id="h_386_38bd45d2_8507_45e7_8c39_e32a2dbd47e4"
      unitRef="pure">1.02</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000047997Member"
      id="t_180_7da40e53_6090_4ef1_8287_c284a1280ef5">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CBIZ, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Everforth, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PBF Energy, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Par Pacific Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CONMED Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dorian LPG Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;DXC Technology Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;International Seaways, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Korn Ferry&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Acadian Asset Management, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12273971.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
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      contextRef="FY2026_C000047997Member"
      id="t_184_cd024ea2_af9b_5b60_1dcf_db5c9be9cfb3">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CBIZ, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Everforth, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PBF Energy, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Par Pacific Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CONMED Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dorian LPG Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;DXC Technology Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;International Seaways, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Korn Ferry&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Acadian Asset Management, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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      id="h_393_67f96b2e_955a_4097_9568_4269d79d4613"
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      contextRef="FY2026_C000047998Member"
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      contextRef="FY2026_C000047998Member"
      id="t_181_cdb06bdf_816a_4ac4_b716_4a95fa077a5b">This annual shareholder report contains important information about the First Trust Large Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000047998Member"
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      contextRef="FY2026_C000047998Member"
      id="t_183_504fafb5_6582_4213_a112_bee91f884365">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FTA&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
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      contextRef="FY2026_C000047998Member"
      id="t_185_655c37e5_1db8_4cb3_aa7c_48c794b70375">www.ftportfolios.com/fund-documents/etf/FTA</oef:AddlInfoWebsite>
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      contextRef="FY2026_C000047998Member"
      id="t_186_2ae17fcf_caf1_492b_b029_a00e8330f8d6">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000047998Member"
      id="t_184_ca839a8b_dad1_483c_96e9_44a6f650d9f4">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000047998Member"
      id="t_187_0f3f5770_a7af_42b9_a69d_1531421f86d1">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Large Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;66&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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    <oef:ExpenseRatioPct
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      id="h_398_c6513497_ba72_412e_83b9_5dc65f8e7900"
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      id="t_188_57080d0d_f675_4fb3_b08b_615388cada48">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 30.11% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index, which returned 19.71% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Financials sector received the greatest allocation of any sector, with an average weight of 21.4% and contributed 4.9% to the Fund&#x2019;s overall return. With an average weight of 11.4%, investments in the Health Care sector contributed 5.7% to the Fund&#x2019;s overall return, which was the greatest of any sector.&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;No sector contributed a negative return to the Fund&#x2019;s overall return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      id="t_189_37aa8342_e2b5_44a9_abc1_aab8a84f3f83">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274045.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000047998Member"
      id="t_190_bfa8a0ba_8417_426e_8057_b275110366dd">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Large Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;30.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Large Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;30.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 500 Large Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;28.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000047998Member"
      id="t_191_26815ad3_86ea_426f_bb05_fd9c5d02e6ef">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FTA&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000047998Member"
      id="t_192_b8db6cfc_006f_49a4_a358_0dc30d7b82fd">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000047998Member"
      id="t_193_fa8b4aea_03ad_4cc3_9420_53f27516d34b">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2026_C000047998Member"
      id="t_194_4d9cbe37_46e5_4251_b9a4_d3f973a0fb22">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,398,022,182&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;189&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;6,147,891&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000047998Member"
      decimals="INF"
      id="h_414_f8cc60d1_0189_4dff_898b_d6c8cf944bf1"
      unitRef="USD">1398022182</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000047998Member"
      decimals="INF"
      id="h_415_6978c348_7b6f_4fa6_b1d7_05c589c88cfa"
      unitRef="Holding">189</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000047998Member"
      decimals="INF"
      id="h_416_7413b7b2_72b1_4650_b6e4_0f5281c1497b"
      unitRef="USD">6147891</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000047998Member"
      decimals="4"
      id="h_417_b5e5d115_3109_4707_b33a_165859d16935"
      unitRef="pure">0.83</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000047998Member"
      id="t_195_a377f52f_1a8c_40a8_84ad_cb3110717768">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Global Payments, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;General Motors Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EOG Resources, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AT&amp;amp;T, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274055.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000047998Member"
      id="t_199_a26ea7ee_e627_f908_8970_e95afc424b11">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Global Payments, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;General Motors Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EOG Resources, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AT&amp;amp;T, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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      contextRef="FY2026_C000047999Member"
      id="t_211_dfcf5183_3d77_7532_90ba_64af828d68fd">First Trust Large Cap Growth AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000047999Member"
      id="t_212_7c03f262_cd2b_d649_80e6_bccd2b3ea8aa">First Trust Large Cap Growth AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000047999Member"
      id="t_219_b4099378_ddf3_17fc_7643_b89a8b21d48c">FTC</dei:TradingSymbol>
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      contextRef="FY2026_C000047999Member"
      id="t_196_1a7cd5d9_66a2_4868_b5c0_0c0d51b04d70">This annual shareholder report contains important information about the First Trust Large Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000047999Member"
      id="t_197_a6db13fc_37ab_4775_8c56_f668c9fb74dc">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2026_C000047999Member"
      id="t_198_feeb6874_3c3b_4c46_b9d5_2f92bea4ba5a">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FTC&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000047999Member"
      id="t_200_5907f388_4c65_4702_86a0_b985ee193349">www.ftportfolios.com/fund-documents/etf/FTC</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000047999Member"
      id="t_201_21fe2a97_1807_4ce1_b517_75f055caa39e">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000047999Member"
      id="t_199_a3399f88_6730_43d4_b257_9c28acf57006">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_202_71b6aca3_a4f7_424e_9d3d_5bd4ad24cccb">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Large Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;61&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000047999Member"
      decimals="INF"
      id="h_428_00bb21d1_d3e4_4bbf_94b8_fd073cd494fa"
      unitRef="USD">61</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000047999Member"
      decimals="4"
      id="h_429_c24fcbf1_2422_463a_9e2f_2bec0b3d2a97"
      unitRef="pure">0.0057</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_203_0e84b7c2_7754_4644_a9b2_fb2847276a78">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 12.88% during the 12 months ended July 31, 2026. The Fund underperformed its benchmark, the S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index, which returned 19.42% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Information Technology sector received the greatest allocation of any sector, with an average weight of 25.9%, and contributed 9.9% to the Fund&#x2019;s overall return. Investments in the Communication Services, with an average weight of 4.8%, contributed -1.2% to the Fund&#x2019;s overall return, which was the most negative contribution of any sector.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_204_21e14807_2cd6_4e9d_889a_a7645ea89a5d">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274003.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_205_9e3ca51d_8b0a_4e61_8be2_e066721d2cef">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Large Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Large Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 500 Large Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.98&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;16.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;15.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P 500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;17.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_206_5a4376bd_4473_42b6_972c_caf4d9b6de88">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FTC&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000047999Member"
      id="t_207_7e924ae7_dc6f_45aa_b109_8ebb18609747">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000047999Member"
      id="t_208_d92f1197_552a_4124_b1cb_5c4f57b0b9b0">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_209_86f040ec_df2f_4313_a62b_58e5f41a495a">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,318,673,505&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;189&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;6,343,316&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;113&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
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      contextRef="TI20260731_C000047999Member"
      decimals="INF"
      id="h_445_b55177f1_2992_478d_b7f4_9dd225a563a9"
      unitRef="USD">1318673505</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_446_0008f8bb_bf4a_4e90_9f1a_a4dd87b3bfb4"
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      decimals="INF"
      id="h_447_7efb0553_622c_41ff_90b0_2ab0a851627c"
      unitRef="USD">6343316</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000047999Member"
      decimals="4"
      id="h_448_6e75e7a6_0630_4e9e_afc4_fe1b5b91ca6e"
      unitRef="pure">1.13</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_210_2f4d8001_97c5_4978_955b_3d37f474cac0">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Incyte Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fortinet, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Datadog, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;eBay, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Interactive Brokers Group, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Morgan Stanley&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EMCOR Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cincinnati Financial Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;United Rentals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ross Stores, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274013.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000047999Member"
      id="t_213_a099d3fd_3ab7_2662_11ca_118904bb1853">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Incyte Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fortinet, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Datadog, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;eBay, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Interactive Brokers Group, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Morgan Stanley&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EMCOR Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cincinnati Financial Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;United Rentals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ross Stores, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047999Member_IncyteCorpMember"
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      id="h_449_f4739436_ad0e_45e5_808e_c50194cebff6"
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      contextRef="TI20260731_C000047999Member_FortinetIncMember"
      decimals="4"
      id="h_450_165b8ed7_f7a4_4267_ac40_00e52603d1f7"
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      contextRef="TI20260731_C000047999Member_DatadogIncClassAMember"
      decimals="4"
      id="h_451_5f11f972_65fc_4aa7_82d3_cc4878a71de2"
      unitRef="pure">0.010</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047999Member_EBayIncMember"
      decimals="4"
      id="h_452_6ba4c91f_52eb_41d8_84f7_02e925831217"
      unitRef="pure">0.010</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047999Member_InteractiveBrokersGroupIncClassAMember"
      decimals="4"
      id="h_453_9a681355_bf4a_4cc8_b990_559041a0962c"
      unitRef="pure">0.010</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047999Member_MorganStanleyMember"
      decimals="4"
      id="h_454_30b224cf_2bdf_44f1_ba00_e6ec4793edff"
      unitRef="pure">0.010</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047999Member_EMCORGroupIncMember"
      decimals="4"
      id="h_455_d2600580_b1e6_40e8_84d6_00e54517c16f"
      unitRef="pure">0.009</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047999Member_CincinnatiFinancialCorpMember"
      decimals="4"
      id="h_456_c84587ac_82bb_400d_9d61_09b8e28c4458"
      unitRef="pure">0.009</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000047999Member_UnitedRentalsIncMember"
      decimals="4"
      id="h_457_b00d14e0_1f27_4735_a7a5_4469ef971be2"
      unitRef="pure">0.009</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000047999Member_RossStoresIncMember"
      decimals="4"
      id="h_458_bffa3747_96b6_445c_8aaa_1362c27db950"
      unitRef="pure">0.009</oef:PctOfTotalInv>
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      contextRef="FY2026_C000048000Member"
      id="t_226_cfeb5da4_0a16_d9f3_055f_7b862ed591f8">First Trust Multi Cap Value AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000048000Member"
      id="t_235_abd7973f_4432_8547_c878_b3b9cb88f154">First Trust Multi Cap Value AlphaDEX&#xae; Fund</oef:FundName>
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      contextRef="FY2026_C000048000Member"
      id="t_227_a0d8f46c_932b_a065_f12e_a09455257145">FAB</dei:TradingSymbol>
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      contextRef="FY2026_C000048000Member"
      id="t_211_03c9e0c6_fcb4_4a86_84a1_45c84e7c669c">This annual shareholder report contains important information about the First Trust Multi Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000048000Member"
      id="t_212_0e2795a7_a9bd_46a0_a454_35bd652ff089">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_213_27301497_016f_4413_8ad3_467d0fd0a923">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FAB&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048000Member"
      id="t_215_74246130_e88a_4360_9db8_502ec51093d1">www.ftportfolios.com/fund-documents/etf/FAB</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048000Member"
      id="t_216_aaeca284_19c8_4e5c_814a_b6e368b26ab0">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048000Member"
      id="t_214_87843524_c192_4280_923c_2f2288135762">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_217_3d991f1d_09db_4763_b2b1_05bd1e9fe235">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Multi Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;75&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.65&lt;span&gt;%&lt;/span&gt;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Excludes any Acquired Fund Fees and Expenses of the&#160;underlying investment companies in which the Fund invests.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
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      id="t_218_a7702ed1_0546_43a3_9311_71e5e9556925">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 30.17% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P Composite 1500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index, which returned 20.19% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, the average allocation to the Financials sector was 22.7%, the greatest of any sector, and contributed 5.8% to the Fund&#x2019;s overall return. With an average weight of 11.5%, investments in the Energy sector contributed 6.0% to the Fund&#x2019;s overall return, the greatest contribution to the Fund&#x2019;s overall return. No sector represented a negative contribution to the Fund&#x2019;s overall return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
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      id="t_219_71481726_9ad8_400b_8895_8e18916831b6">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274129.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000048000Member"
      id="t_220_72c1caac_07f4_4900_b833_3b599f233775">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Multi Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;30.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Multi Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;31.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.62&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US Multi Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;28.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P Composite 1500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P Composite 1500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;20.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.73&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_233_b8695815_bf42_ca0a_72d7_5571f38d2236">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_Russell3000IndexMember"
      decimals="4"
      id="h_476_9d25d051_4c60_49e0_9728_12aa071ac048"
      unitRef="pure">0.1960</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_Russell3000IndexMember"
      decimals="4"
      id="h_477_c76ea5f2_9134_43ed_82ea_562804854189"
      unitRef="pure">0.1182</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell3000IndexMember"
      decimals="4"
      id="h_478_e74452ee_3369_4288_9bd5_daf89f02f045"
      unitRef="pure">0.1456</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_221_ae2412d3_9ae9_49a1_ad60_5b0cd0ef86db">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FAB&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000048000Member"
      id="t_222_58d0c4af_88c0_4862_a6ae_0d01a431d378">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_223_04808a04_fb8d_4e6d_a013_e82f0f23afe9">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_224_c0b784d5_2694_402f_8243_fee32ad3015c">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;168,465,133&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;676&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;649,600&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000048000Member"
      decimals="INF"
      id="h_479_9ace294b_86d3_4fff_90bc_c56e765b6037"
      unitRef="USD">168465133</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000048000Member"
      decimals="INF"
      id="h_480_afb06673_0aec_4b36_909e_7363fa412828"
      unitRef="Holding">676</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048000Member"
      decimals="INF"
      id="h_481_1864fa6d_6754_4b99_88ee_acbfd9290420"
      unitRef="USD">649600</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048000Member"
      decimals="4"
      id="h_482_f54a2bea_da7a_4874_9dce_f9d5e74c956e"
      unitRef="pure">0.85</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_225_9f5096ba_9faf_44d2_9b12_af28e72c6e51">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Global Payments, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;General Motors Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EOG Resources, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AT&amp;amp;T, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274139.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048000Member"
      id="t_234_39e259fd_a72b_c2bc_58ce_1323b0282650">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cognizant Technology Solutions Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Accenture PLC, Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PayPal Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Global Payments, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ConocoPhillips&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;General Motors Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fidelity National Information Services, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EOG Resources, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Travelers (The) Cos., Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AT&amp;amp;T, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      decimals="4"
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      decimals="4"
      id="h_484_39ca94dd_f46f_4eec_8fed_a1bf52ecdcfd"
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      contextRef="TI20260731_C000048000Member_PayPalHoldingsIncMember"
      decimals="4"
      id="h_485_64c57ee9_fa85_4c51_bf02_4d6b4307d553"
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      contextRef="TI20260731_C000048000Member_GlobalPaymentsIncMember"
      decimals="4"
      id="h_486_457547ed_f040_4cec_8d5e_0ca0d4322ebf"
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      contextRef="TI20260731_C000048000Member_ConocoPhillipsMember"
      decimals="4"
      id="h_487_3fe5021f_fba6_433b_9ac8_4696284aced8"
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      contextRef="TI20260731_C000048000Member_GeneralMotorsCoMember"
      decimals="4"
      id="h_488_adc8ab52_3532_473f_b85e_681e04ec6b92"
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      contextRef="TI20260731_C000048000Member_FidelityNationalInformationServicesIncMember"
      decimals="4"
      id="h_489_017fce23_1ff3_4833_87ee_e53842b1b77a"
      unitRef="pure">0.005</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048000Member_EOGResourcesIncMember"
      decimals="4"
      id="h_490_1d24aefa_d997_4686_ae04_02a56f2f0f63"
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      contextRef="TI20260731_C000048000Member_TravelersTheCosIncMember"
      decimals="4"
      id="h_491_5f7b2745_3a8d_4f16_b3da_e9ed2f72364c"
      unitRef="pure">0.005</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000048000Member_ATAndTIncMember"
      decimals="4"
      id="h_492_481785c1_a795_4cc2_b887_78e7313e9080"
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    <oef:ClassName
      contextRef="FY2026_C000048001Member"
      id="t_241_28d292fd_45b3_3eca_d2b2_4e69e6192646">First Trust Multi Cap Growth AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000048001Member"
      id="t_242_1e966f8d_0b24_82ae_ce75_3a53077cb516">First Trust Multi Cap Growth AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000048001Member"
      id="t_243_aa10ae2c_4b65_5c21_494d_d3711ff6e03d">FAD</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_226_a8c2af60_f005_472a_9cee_1deb2262fde0">This annual shareholder report contains important information about the First Trust Multi Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000048001Member"
      id="t_227_6a434b39_ea52_423d_bdb4_5aa39a0cafdd">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_228_ce06f45b_af5d_47c0_b8b0_3845f667e15b">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FAD&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000048001Member"
      id="t_230_4de9cde1_ec97_4c88_beea_d07f5508b18d">www.ftportfolios.com/fund-documents/etf/FAD</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000048001Member"
      id="t_231_f27efd71_0cfb_4803_9ebc_7d6662ae7186">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000048001Member"
      id="t_229_eb2003c1_3e51_4f91_a3ac_cf0dd73f7846">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_232_0ea681db_8e83_441f_b07b_099ee4fbbae9">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Multi Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;66&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.59&lt;span&gt;%&lt;/span&gt;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Excludes any Acquired Fund Fees and Expenses of the&#160;underlying investment companies in which the Fund invests.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000048001Member"
      decimals="INF"
      id="h_493_24443993_976b_4040_90dc_0a4e2ee5ee0a"
      unitRef="USD">66</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000048001Member"
      decimals="4"
      id="h_494_2dc4c95e_aa42_4dda_b678_f75617f54083"
      unitRef="pure">0.0059</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_233_3175578d_c7e6_4bd4_9146_0b6ada4b1ee4">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 22.09% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P Composite 1500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index, which returned 19.78% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, the Fund&#x2019;s greatest allocation was to the Industrials sector. The Industrials sector received an average allocation of 25.2% and contributed 6.4% to the Fund&#x2019;s overall return. With an average weight of 21.1%, investments in the Information Technology sector contributed 9.0% to the Fund&#x2019;s overall return, the greatest contribution of the Fund&#x2019;s overall return. With an average weight of 1.7%, investments in the Utilities sector contributed -0.3% to the Fund&#x2019;s overall return, the most negative contribution of any sector.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_234_1c701d23_8e89_491e_a392_b429b65067cc">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274087.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_235_aaf58394_7809_4d12_8c7d_8b9d60335089">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Multi Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;22.09&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Multi Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;22.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.33&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US Multi Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.38&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;16.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P Composite 1500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.97&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P Composite 1500&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;16.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_238_9b75fbe9_5b38_4c47_8c79_6249428a31c3">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2026_C000048001Member"
      id="t_239_df18367d_01a0_4db6_a4cf_c6c5c70f192a">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;577,445,793&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;678&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;2,079,056&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;106&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
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      id="h_514_3caa4a7a_03a9_4ba2_a362_ad98652d3389"
      unitRef="Holding">678</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000048001Member"
      decimals="INF"
      id="h_515_aec95f47_deb6_4ec4_9104_6842be2141a7"
      unitRef="USD">2079056</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000048001Member"
      decimals="4"
      id="h_516_c87804d3_389c_4333_8e34_a067eda671a4"
      unitRef="pure">1.06</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_240_12fb3a60_5af7_43db_8977_8a0db49bbb71">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Incyte Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fortinet, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Datadog, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;eBay, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Interactive Brokers Group, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Morgan Stanley&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EMCOR Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cincinnati Financial Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;United Rentals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ross Stores, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274097.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000048001Member"
      id="t_244_12d789f2_56d3_8a05_a6e4_fac0729607c1">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Incyte Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Fortinet, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Datadog, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;eBay, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Interactive Brokers Group, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Morgan Stanley&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EMCOR Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Cincinnati Financial Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;United Rentals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ross Stores, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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      id="h_518_72de2e95_e4c6_4ab7_a239_762fb846713e"
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      decimals="4"
      id="h_519_77a1737f_ddf0_4fb3_a000_ccfc308c8d4a"
      unitRef="pure">0.005</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000048001Member_EBayIncMember"
      decimals="4"
      id="h_520_edbe8418_f383_404d_a98a_3ba9070ea814"
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      decimals="4"
      id="h_521_62d11e04_c0aa_4228_aa07_9100a018abfc"
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      decimals="4"
      id="h_522_047ad8af_bfe3_468f_ba9d_646d99f35ed5"
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      id="h_523_643e2fe9_c3ea_47d6_808d_5a6f615bb8ea"
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      id="h_524_1fb951e2_da6c_4c21_a6ac_1f52669f69c6"
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      contextRef="TI20260731_C000048001Member_RossStoresIncMember"
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    <oef:ClassName
      contextRef="FY2026_C000099060Member"
      id="t_256_a0ee27bc_8ced_5c61_7ff1_bad37ecde5ff">First Trust Mid Cap Value AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000099060Member"
      id="t_257_c603c1ee_cb3a_6975_fe9b_e54ef05c6d9a">First Trust Mid Cap Value AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000099060Member"
      id="t_258_6bfc1a7d_1352_3ed0_a2b6_9273d3cfd3d5">FNK</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_241_dcb98b9d_99d9_4b95_bc12_bf017b928231">This annual shareholder report contains important information about the First Trust Mid Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000099060Member"
      id="t_242_8b26e4e3_03f0_414a_a31a_d2fbd76cc02f">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_243_1b6f0fe0_0523_41d9_a23d_8d61329937d5">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FNK&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000099060Member"
      id="t_245_ce1c894b_3a10_440b_b716_91f838dc7f14">www.ftportfolios.com/fund-documents/etf/FNK</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000099060Member"
      id="t_246_980dd149_cbb8_49c5_9c98_1b2ff1640f43">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000099060Member"
      id="t_244_86026946_400e_4ce9_8674_471735104ac5">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_247_ad67611b_3320_47d0_922c_d9c708d5b726">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Mid Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;79&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.71&lt;span&gt;%&lt;/span&gt;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&#160;(2)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Excludes any Acquired Fund Fees and Expenses of the&#160;underlying investment companies in which the Fund invests.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(2)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Includes extraordinary expenses. If these extraordinary expenses were not included, the expense ratio would have been 0.70%.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000099060Member"
      decimals="INF"
      id="h_527_c7c70676_65b6_4731_8480_6a05a6dc5ac9"
      unitRef="USD">79</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000099060Member"
      decimals="4"
      id="h_528_6abd60aa_1ab4_4517_b207_f7db88c941e1"
      unitRef="pure">0.0071</oef:ExpenseRatioPct>
    <oef:ExtraordinaryExpensesFnTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_259_b1c083d0_904e_d764_063b_06dd5c45a303">Includes extraordinary expenses. If these extraordinary expenses were not included, the expense ratio would have been 0.70%.</oef:ExtraordinaryExpensesFnTextBlock>
    <oef:ExpensesExclExtraordinaryExpensesPct
      contextRef="FY2026_C000099060Member"
      decimals="4"
      id="h_558_c16a4095_f632_9300_0b06_f8e4cd238443"
      unitRef="pure">0.0070</oef:ExpensesExclExtraordinaryExpensesPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_248_33ce62a8_a1e4_46cb_9431_1f113a1ab218">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 22.53% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P MidCap 400&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index, which returned 20.77% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Financials sector received the greatest allocation of any sector, with an average weight of 24.4%, and contributed 6.2% to the Fund&#x2019;s overall return, which was the greatest of any sector. Investments in the Consumer Staples sector, with an average weight of 6.0%, contributed -0.1% to the Fund&#x2019;s overall return, which was the most negative return contribution of any sector.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_249_79358737_f39d_4fbf_b19b_c939ea5d8750">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274213.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_250_32ad56d4_bfc4_47ba_b579_413e1d93152a">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Mid Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;22.53&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.06&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.76&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Mid Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;23.46&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 600 Mid Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;28.24&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.44&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P MidCap 400&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;20.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.55&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_251_459529f1_3de4_4066_aca4_53183b735c3a">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FNK&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000099060Member"
      id="t_252_66af0fe9_b14f_48f8_a127_9b8acd056377">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000099060Member"
      id="t_253_ca7deb81_ce45_46a2_bd81_5d15fb66da1d">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_254_995edfd8_d504_4a46_a1ab_5aee75042cbd">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;228,068,181&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;227&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,450,052&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;104&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000099060Member"
      decimals="INF"
      id="h_544_b432a089_79e0_451b_a50d_b692d63e2df1"
      unitRef="USD">228068181</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000099060Member"
      decimals="INF"
      id="h_545_0f61ceaa_057a_40e1_a633_4723b1fb41f4"
      unitRef="Holding">227</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000099060Member"
      decimals="INF"
      id="h_546_b1ca43c0_5309_4d7a_bb81_9fef1bcda960"
      unitRef="USD">1450052</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000099060Member"
      decimals="4"
      id="h_547_3072784c_9a5f_47f3_a3d0_81cca9d3072d"
      unitRef="pure">1.04</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_255_6aff2bde_ae11_466c_9b2f_c615badb06fa">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EPAM Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lithia Motors, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;HF Sinclair Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Genpact Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;SM Energy Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ovintiv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ADT, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Permian Resources Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CF Industries Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Asbury Automotive Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274223.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000099060Member"
      id="t_265_59e81efb_b6c1_9c71_2574_7f713d1d71e3">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;EPAM Systems, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Lithia Motors, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;HF Sinclair Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Genpact Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;SM Energy Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Ovintiv, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;ADT, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Permian Resources Corp., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CF Industries Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Asbury Automotive Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      decimals="4"
      id="h_549_e0371e66_de0c_4853_8353_607675cc7b07"
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      contextRef="TI20260731_C000099060Member_HFSinclairCorpMember"
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      id="h_550_e733a46c_38c6_4fa7_b2ae_12ace76ba6f8"
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      id="h_551_e44b7e87_542f_45ea_9f1e_b5fd015f97f2"
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      contextRef="TI20260731_C000099060Member_SMEnergyCoMember"
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      id="h_552_709dc9ec_161e_4253_b2fb_6c1616b542fc"
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      contextRef="TI20260731_C000099060Member_OvintivIncMember"
      decimals="4"
      id="h_553_88907379_bb68_47ee_9fec_e6d948ad14e0"
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      contextRef="TI20260731_C000099060Member_ADTIncMember"
      decimals="4"
      id="h_554_3a6fee3e_76a5_437d_ab9a_fe9b1af43175"
      unitRef="pure">0.008</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000099060Member_PermianResourcesCorpClassAMember"
      decimals="4"
      id="h_555_891ce8d4_1c85_4cb7_844e_9464044d0905"
      unitRef="pure">0.008</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000099060Member_CFIndustriesHoldingsIncMember"
      decimals="4"
      id="h_556_94e8db8f_edff_449b_a498_3f0faea74b1c"
      unitRef="pure">0.008</oef:PctOfTotalInv>
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      contextRef="TI20260731_C000099060Member_AsburyAutomotiveGroupIncMember"
      decimals="4"
      id="h_557_217769b7_f3b6_45f6_a935_d6999fe6b88a"
      unitRef="pure">0.008</oef:PctOfTotalInv>
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      contextRef="FY2026_C000099059Member"
      id="t_271_7a48631a_6ef9_2926_365b_83ff0deaeef4">First Trust Mid Cap Growth AlphaDEX&#xae; Fund</oef:ClassName>
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      contextRef="FY2026_C000099059Member"
      id="t_256_3dcbf6f1_e578_4321_8f6c_dd4908f1cb6e">This annual shareholder report contains important information about the First Trust Mid Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000099059Member"
      id="t_257_0bd8f703_9729_4323_9ab4_fda28ff587dc">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_258_b20582c1_3196_4d42_87b9_9b160ce0db2b">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FNY&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000099059Member"
      id="t_260_f161e745_54d6_420c_aa1e_be54f7b39518">www.ftportfolios.com/fund-documents/etf/FNY</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000099059Member"
      id="t_261_14bca16e_2ce1_4e04_a250_47ffa0a121d6">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000099059Member"
      id="t_259_a546a4e1_ea13_4c7d_b6a1_86a24f948078">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_262_177b42db_abaf_4720_83d4_83f43ffa4941">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Mid Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;79&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.71&lt;span&gt;%&lt;/span&gt;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&#160;(2)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Excludes any Acquired Fund Fees and Expenses of the&#160;underlying investment companies in which the Fund invests.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(2)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Includes extraordinary expenses. If these extraordinary expenses were not included, the expense ratio would have been 0.70%.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_558_77e070c5_00fc_4109_b1f1_bc0eca9db4f7"
      unitRef="USD">79</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_559_20edaa3b_a822_4906_b5c4_67644806e293"
      unitRef="pure">0.0071</oef:ExpenseRatioPct>
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      id="t_280_ae555662_4ac6_5f51_627d_5cbfa72c6d1c">Includes extraordinary expenses. If these extraordinary expenses were not included, the expense ratio would have been 0.70%.</oef:ExtraordinaryExpensesFnTextBlock>
    <oef:ExpensesExclExtraordinaryExpensesPct
      contextRef="FY2026_C000099059Member"
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      id="h_589_14d79cc7_5fdd_190b_f4cb_3fbc1e71b6b3"
      unitRef="pure">0.0070</oef:ExpensesExclExtraordinaryExpensesPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_263_ab7b96d9_7190_492c_bd83_5e5edeef187a">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 21.30% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P MidCap 400&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index, which returned 21.18% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Industrials sector received the greatest allocation of any sector, with an average weight of 26.7%, and contributed 6.3% to the Fund&#x2019;s overall return, which was the greatest of any sector. Investments in the Consumer Staples sector, with an average weight of 1.7%, contributed -0.8% to Fund&#x2019;s overall return, which was the most negative contribution of any sector.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_264_6f9317a9_2076_4141_a09b_42386c3ab094">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274171.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_265_8d0ab3a2_fd04_48e9_b6d1_47c25f3361d7">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Mid Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;21.30&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Mid Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;22.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 600 Mid Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;3.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P MidCap 400&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;21.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.96&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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      id="t_275_cc6439db_481d_04ed_f69d_48c122738cab">First Trust Mid Cap Growth AlphaDEX&#xae; Fund</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_560_feec8dec_b185_42fd_ba37_82c8d8a4dca1"
      unitRef="pure">0.2130</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.0703</oef:AvgAnnlRtrPct>
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      id="h_562_478b6da2_540f_44b3_af08_4b439e19d643"
      unitRef="pure">0.1286</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0782</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_NasdaqAlphaDEXMidCapGrowthTMIndexMember"
      decimals="4"
      id="h_565_7d137e2b_cd7f_4345_a72b_ba7dcdff65db"
      unitRef="pure">0.1369</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_NasdaqUS600MidCapGrowthTMIndexMember"
      id="t_277_b5e1664b_1467_53f1_d4ce_994b1fa36aa6">Nasdaq US 600 Mid Cap GrowthTM Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_NasdaqUS600MidCapGrowthTMIndexMember"
      decimals="4"
      id="h_566_1915ba0e_009c_44bb_ba94_942a02f45fab"
      unitRef="pure">0.1488</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_NasdaqUS600MidCapGrowthTMIndexMember"
      decimals="4"
      id="h_567_3644d7c0_d5c8_4368_9f3a_1988809606e5"
      unitRef="pure">0.0364</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_NasdaqUS600MidCapGrowthTMIndexMember"
      decimals="4"
      id="h_568_931cafb4_a813_4a49_97fa_37b63ccfee62"
      unitRef="pure">0.1048</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_SAndPMidCap400GrowthIndexMember"
      id="t_278_fb43568a_9be4_e944_a108_5b7f1c622ed5">S&amp;P MidCap 400&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_SAndPMidCap400GrowthIndexMember"
      decimals="4"
      id="h_569_b1c3f9ee_3383_42de_b385_f5d3544dde58"
      unitRef="pure">0.2118</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_SAndPMidCap400GrowthIndexMember"
      decimals="4"
      id="h_570_c13bf811_dacd_4178_bc69_b8579bb4c613"
      unitRef="pure">0.0757</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_SAndPMidCap400GrowthIndexMember"
      decimals="4"
      id="h_571_cc37cd37_6ab0_409d_aab2_5afa183cf909"
      unitRef="pure">0.1096</oef:AvgAnnlRtrPct>
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      contextRef="FY2026_Russell3000IndexMember"
      id="t_279_50121f4e_3eb5_e7b5_f34b_e57f03127935">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_Russell3000IndexMember"
      decimals="4"
      id="h_572_4bc6d8d6_5e34_4624_bd61_585244fed346"
      unitRef="pure">0.1960</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_Russell3000IndexMember"
      decimals="4"
      id="h_573_1bd13afd_330b_4ce6_9fb4_67824bbdcc2c"
      unitRef="pure">0.1182</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell3000IndexMember"
      decimals="4"
      id="h_574_eaa4c667_5e8f_4c28_b580_1d76d5e5b0ae"
      unitRef="pure">0.1456</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_266_77c87253_fdd2_4aa0_8966_d720d11ff00c">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FNY&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000099059Member"
      id="t_267_72ca252e_69f2_4aa4_97bc_79da704ba404">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_268_17d56911_1a66_4a07_bec6_ed086750a050">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_269_c8df2028_486d_42cc_b8ba_1999c02b0eee">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;577,587,332&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;227&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;3,450,038&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;135&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000099059Member"
      decimals="INF"
      id="h_575_1012cdd4_77f6_4c8b_9ef2_bd85e7c4c23c"
      unitRef="USD">577587332</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000099059Member"
      decimals="INF"
      id="h_576_4a07d6f9_634e_4d0c_9a4e_74010ee88f49"
      unitRef="Holding">227</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000099059Member"
      decimals="INF"
      id="h_577_491142f5_d03d_4301_be38_e82c9dca2264"
      unitRef="USD">3450038</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000099059Member"
      decimals="4"
      id="h_578_2e21211c_1829_4130_a420_2e064d460bab"
      unitRef="pure">1.35</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_270_931113f6_cb23_4de2_9b47_4d982f5470cb">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Etsy, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Guardant Health, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PACS Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Victoria&#x2019;s Secret &amp;amp; Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Amneal Pharmaceuticals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Enova International, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Corcept Therapeutics, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;IES Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Tutor Perini Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Coca-Cola Consolidated, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274181.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000099059Member"
      id="t_274_5267224b_5b56_d266_f562_880aed18adf8">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Etsy, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Guardant Health, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PACS Group, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Victoria&#x2019;s Secret &amp;amp; Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Amneal Pharmaceuticals, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Enova International, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Corcept Therapeutics, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;IES Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Tutor Perini Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Coca-Cola Consolidated, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_EtsyIncMember"
      decimals="4"
      id="h_579_850e1efa_c64a_46d8_ae3b_47487ab3a824"
      unitRef="pure">0.009</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_GuardantHealthIncMember"
      decimals="4"
      id="h_580_7a6c2f5c_1a15_4d3f_9641_dc7e2bd7fc77"
      unitRef="pure">0.009</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_PACSGroupIncMember"
      decimals="4"
      id="h_581_6810bf53_247f_4a95_b0bc_718a636f8c53"
      unitRef="pure">0.009</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_VictoriaSSecretAndCoMember"
      decimals="4"
      id="h_582_d0864406_dba2_401e_9117_85444ad3253b"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_AmnealPharmaceuticalsIncMember"
      decimals="4"
      id="h_583_8eb5fc5b_66ba_4e84_859a_8f22ad2f36b2"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_EnovaInternationalIncMember"
      decimals="4"
      id="h_584_9759c914_9287_4d57_ae30_c00eb33cdc58"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_CorceptTherapeuticsIncMember"
      decimals="4"
      id="h_585_e33b7d81_bb9a_47a4_a87e_91edeafb9056"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_IESHoldingsIncMember"
      decimals="4"
      id="h_586_3d9f4ca1_bc14_4d4f_902e_efcf281d96f6"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_TutorPeriniCorpMember"
      decimals="4"
      id="h_587_6b85ebaf_774f_42e6_806a_3242f3cb6f4c"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260731_C000099059Member_CocaColaConsolidatedIncMember"
      decimals="4"
      id="h_588_5a188063_1789_4059_89a2_9b1e7ef373c4"
      unitRef="pure">0.008</oef:PctOfTotalInv>
    <oef:ClassName
      contextRef="FY2026_C000099062Member"
      id="t_286_dfe07c3b_f129_8d48_adef_651e8d04afab">First Trust Small Cap Value AlphaDEX&#xae; Fund</oef:ClassName>
    <oef:FundName
      contextRef="FY2026_C000099062Member"
      id="t_287_f1c21aed_c336_e86e_81d2_a6d1ac306b06">First Trust Small Cap Value AlphaDEX&#xae; Fund</oef:FundName>
    <dei:TradingSymbol
      contextRef="FY2026_C000099062Member"
      id="t_288_698e54ba_fc6f_5e60_3c1a_389b0c9cd61d">FYT</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_271_bcd6c128_4abe_4bb9_823f_11fc660a0ff6">This annual shareholder report contains important information about the First Trust Small Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund (the &#x201c;Fund&#x201d;) for the year of August 1, 2025 to July 31, 2026 (the &#x201c;Period&#x201d;).</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000099062Member"
      id="t_272_88148a98_b9b2_4c11_b0e1_5e978963a803">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_273_c67ce297_5d94_4d6d_bc5f_d108d1b05aa2">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FYT&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000099062Member"
      id="t_275_2689b609_94a5_42c7_84da_9a07fffcb895">www.ftportfolios.com/fund-documents/etf/FYT</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000099062Member"
      id="t_276_38d9af9e_29b6_4c1b_99cf_8edbb382e451">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000099062Member"
      id="t_274_8c557b63_435e_4199_8aa5_a7807272a156">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_277_4d3da714_3566_40a7_ad67_7f0d66060e63">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Small Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;86&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.71&lt;span&gt;%&lt;/span&gt;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; width: 1.8em; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;&#x200b;&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Times New Roman'; font-weight: normal; color: rgb(0, 0, 0); text-align: left; padding-top: 2.25pt; padding-right: 0; padding-bottom: 0; padding-left: 0; font-style: normal; font-size: 7.5pt; vertical-align: baseline;"&gt;
&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';font-size:7.5pt;"&gt;Includes extraordinary expenses. If these extraordinary expenses were not included, the expense ratio would have been 0.70%.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000099062Member"
      decimals="INF"
      id="h_589_e8f79836_1552_4a02_a6a0_813bc6932594"
      unitRef="USD">86</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000099062Member"
      decimals="4"
      id="h_590_29735d9b_b4d4_46c9_a3a4_2cbbecdd860f"
      unitRef="pure">0.0071</oef:ExpenseRatioPct>
    <oef:ExtraordinaryExpensesFnTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_295_7324d560_4f6d_a50d_e092_4b3a408f9ec3">Includes extraordinary expenses. If these extraordinary expenses were not included, the expense ratio would have been 0.70%.</oef:ExtraordinaryExpensesFnTextBlock>
    <oef:ExpensesExclExtraordinaryExpensesPct
      contextRef="FY2026_C000099062Member"
      decimals="4"
      id="h_620_886c5d16_a23a_7129_4693_2aedce38ad8f"
      unitRef="pure">0.0070</oef:ExpensesExclExtraordinaryExpensesPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_278_5bd93df4_bc63_4faf_8bc7_660170973de5">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 42.37% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P SmallCap 600&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index, which returned 37.16% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, investments in the Financials sector received the greatest allocation of any sector with an average weight of 23.6% and contributed 7.3% to the Fund&#x2019;s overall return. With an average weight of 11.5%, investments in the Energy sector contributed 9.7% to the Fund&#x2019;s overall return, which was the greatest return contribution of any sector. No sector represented a negative contribution to the Fund&#x2019;s overall return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_279_c33c46f6_2944_4ad9_8efa_a49b39f80cd1">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274297.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_280_fbfbdc09_450c_473e_8c89_e62d1d4938cd">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Small Cap Value AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;42.37&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;9.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Small Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;43.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 700 Small Cap Value&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;34.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.51&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.53&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P SmallCap 600&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Value Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;37.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;8.14&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;10.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
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    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_281_744201b7_9bc2_49f4_8013_f5ffd9558e1a">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FYT&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
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      contextRef="FY2026_C000099062Member"
      id="t_282_be6ced29_d8c8_4858_87b3_3789fa5cb7d5">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000099062Member"
      id="t_283_54148d62_bebb_4f3d_a99f_bca817194f31">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_284_b594617f_b1c2_4ffb_b0ec_576a6c7695b6">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;194,555,801&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;264&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,089,872&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;110&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
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      id="h_606_4f3aab51_f5c4_41bb_8368_07512cfbb9bb"
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    <oef:AdvisoryFeesPaidAmt
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    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000099062Member"
      decimals="4"
      id="h_609_4f6b72e7_3b3a_41e5_be0e_7e83fde9859c"
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    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_285_23f2c387_1b47_48a6_b19e_9f6873d6df63">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CBIZ, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Everforth, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PBF Energy, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Par Pacific Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CONMED Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dorian LPG Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;DXC Technology Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;International Seaways, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PVH Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Adient PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274307.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000099062Member"
      id="t_289_b6076cf5_61f8_e3d2_fac4_5d9db115ab59">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CBIZ, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Everforth, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PBF Energy, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Par Pacific Holdings, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;CONMED Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Dorian LPG Ltd.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;DXC Technology Co.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;International Seaways, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;PVH Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Adient PLC&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:LargestHoldingsTableTextBlock>
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      id="h_613_d61ce469_6e93_4b63_b934_f267ec043cd5"
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      id="h_614_953d5681_d872_4d48_9663_de40be53df58"
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      id="h_616_0c1c9124_e7cd_479f_8ec9_fac7595c3607"
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    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_288_c9cd3288_d681_477f_a771_e45b88e0a536">You can find additional information about the Fund at &lt;span style="white-space:nowrap;color:rgb(0, 60, 113);text-decoration-line:underline"&gt;www.ftportfolios.com/fund-documents/etf/FYC&lt;/span&gt;. You can also request this information by contacting us at 1-800-621-1675 or &lt;span style="text-decoration-line:underline;color:rgb(0, 60, 113);font-size:9pt;font-weight:normal;font-family:'times new roman'"&gt;info@ftportfolios.com&lt;/span&gt;.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000099061Member"
      id="t_290_29d64e2b_6c0f_423d_8ad5_3eb47fd06c05">www.ftportfolios.com/fund-documents/etf/FYC</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000099061Member"
      id="t_291_56a054f1_47fa_4e46_b4fe_bc87f8a4b380">1-800-621-1675</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000099061Member"
      id="t_289_185981ae_498f_403a_8afb_ede8a89060e1">info@ftportfolios.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_292_e2e05f4d_d302_4c4e_8d7e_801545d96da3">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT WERE THE FUND COSTS FOR THE LAST YEAR?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt;(Based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom;"&gt;Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom;"&gt;Costs paid as a percentage&lt;br/&gt; of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; vertical-align: baseline;"&gt;First Trust Small Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;87&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); vertical-align: baseline; white-space: nowrap;"&gt;0.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000099061Member"
      decimals="INF"
      id="h_620_aa8e61c3_3782_46fe_9cca_5cc1a2d00e31"
      unitRef="USD">87</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000099061Member"
      decimals="4"
      id="h_621_5827e3a3_658d_4b89_8160_2fd9994f5f33"
      unitRef="pure">0.0070</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_293_ffd2d982_133d_4b92_8ed9_cb78bf57cdf3">&lt;div style="margin-top:14pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;HOW DID THE FUND PERFORM LAST YEAR? WHAT AFFECTED THE FUND&#x2019;S PERFORMANCE?&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;The Fund returned 48.72% during the 12 months ended July 31, 2026. The Fund outperformed its benchmark, the S&amp;amp;P SmallCap 600&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index, which returned 30.43% for the same Period.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';white-space:pre-wrap;"&gt;During the Period, the Health Care sector received the greatest allocation of any sector, with an average weight of 24.0%, and contributed 15.1% to the Fund&#x2019;s return, the largest positive contribution of any sector. No sector represented a negative contribution to the Fund&#x2019;s overall return.&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_294_090cae47_22e0_46c7_89bf_6063df127005">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;FUND PERFORMANCE (July 31, 2016 to July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The performance line graph below shows the performance of a hypothetical $10,000 initial investment in the Fund over a ten-year period (or for the life of the Fund, if shorter). The subsequent account value as of the end of the Period is listed next to the name of the Fund or index, as applicable. The performance table below shows the average annual total returns of the Fund for the past one-, five-, and ten-year periods, as applicable (or for the life of the Fund, if shorter), as&lt;span style="white-space:nowrap"&gt;&#160;&lt;/span&gt;of the end of the Period. Both the line graph and performance table compare the Fund&#x2019;s performance to an appropriate broad-based index and may compare to additional indices reflecting the market segment(s) in which the Fund invests over the same periods.&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;font-weight:bold;color:rgb(0, 0, 0);"&gt;Investment Performance of $10,000&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);margin-bottom:20pt;"&gt; &lt;img alt="Fund Performance - Growth of 10K" src="chartimages_12274255.jpg" style="display: block; margin-left: auto; margin-right: auto; width: 468pt;"/&gt;  &lt;/div&gt;</oef:LineGraphTableTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_295_0da17305_46d2_47e7_aa85_3ceab741e622">&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid;margin-bottom:1ex"&gt;
&lt;tr style="break-after:avoid;break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 1pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; font-weight: bold; vertical-align: bottom; font-style: normal; width: 60%;"&gt;Average Annual Total Returns (as of July 31, 2026)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;1 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;5 Year&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); font-weight: bold; vertical-align: bottom; font-style: normal;"&gt;10 Year&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;First Trust Small Cap Growth AlphaDEX&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Fund&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;48.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.24&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;13.92&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq AlphaDEX Small Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;49.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.81&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Nasdaq US 700 Small Cap Growth&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;TM&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;39.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;7.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;12.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;S&amp;amp;P SmallCap 600&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Growth Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;30.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;6.69&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.13&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 12pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left; font-style: normal;"&gt;Russell 3000&lt;sup style="font-size:smaller;line-height:0px;vertical-align:3.2pt"&gt;&#xae;&lt;/sup&gt; Index&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;19.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;11.82&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;14.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_C000099061Member"
      id="t_304_d1e70bcc_2eb9_8807_1f42_fc15a185a2fd">First Trust Small Cap Growth AlphaDEX&#xae; Fund</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_C000099061Member"
      decimals="4"
      id="h_622_4f6d245c_0da5_4d5e_8661_122456fc32cb"
      unitRef="pure">0.4872</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_C000099061Member"
      decimals="4"
      id="h_623_971b5b65_680d_42ae_9d0d_9f4880b110cd"
      unitRef="pure">0.1124</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_C000099061Member"
      decimals="4"
      id="h_624_43582d2c_d745_44d2_b9ba_4863020b75c7"
      unitRef="pure">0.1392</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_NasdaqAlphaDEXSmallCapGrowthTMIndexMember"
      id="t_306_b0476177_d8a8_0654_2aa2_8d5f752bbaa4">Nasdaq AlphaDEX Small Cap GrowthTM Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_NasdaqAlphaDEXSmallCapGrowthTMIndexMember"
      decimals="4"
      id="h_625_17e51eae_6cda_4920_aa51_6b385e94b7be"
      unitRef="pure">0.4994</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_NasdaqAlphaDEXSmallCapGrowthTMIndexMember"
      decimals="4"
      id="h_626_994c57bd_9e4f_405e_b80d_2fa58292addc"
      unitRef="pure">0.1210</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_NasdaqAlphaDEXSmallCapGrowthTMIndexMember"
      decimals="4"
      id="h_627_fcc8862b_491c_44a3_be03_ba45bfbcfd58"
      unitRef="pure">0.1481</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_NasdaqUS700SmallCapGrowthTMIndexMember"
      id="t_307_c43bc543_1d1d_dfcb_fbcd_b343c164e47a">Nasdaq US 700 Small Cap GrowthTM Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_NasdaqUS700SmallCapGrowthTMIndexMember"
      decimals="4"
      id="h_628_d1c5bc97_90a1_4e95_a039_3a2a337641c1"
      unitRef="pure">0.3941</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_NasdaqUS700SmallCapGrowthTMIndexMember"
      decimals="4"
      id="h_629_e92726d3_9f77_400a_a448_af70a20c9e2c"
      unitRef="pure">0.0771</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_NasdaqUS700SmallCapGrowthTMIndexMember"
      decimals="4"
      id="h_630_711aa6a4_0d78_47e6_aee3_21c3276dcc9d"
      unitRef="pure">0.1258</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_SAndPSmallCap600GrowthIndexMember"
      id="t_308_0fd204ce_b801_a4ef_c297_6d4d852e2243">S&amp;P SmallCap 600&#xae; Growth Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_SAndPSmallCap600GrowthIndexMember"
      decimals="4"
      id="h_631_f502021d_0436_40e8_bfcf_d752a7191bf6"
      unitRef="pure">0.3043</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_SAndPSmallCap600GrowthIndexMember"
      decimals="4"
      id="h_632_0761cdbd_0c80_4f9c_bf44_3db5a4a99cfb"
      unitRef="pure">0.0669</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_SAndPSmallCap600GrowthIndexMember"
      decimals="4"
      id="h_633_474d51c7_0a65_4147_8d36_7025bcc8778a"
      unitRef="pure">0.1113</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_Russell3000IndexMember"
      id="t_309_fce86f83_a501_3d6c_7b20_1f3707ea9ba4">Russell 3000&#xae; Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_Russell3000IndexMember"
      decimals="4"
      id="h_634_440c33f9_920e_4a54_a6bd_8330062b64d3"
      unitRef="pure">0.1960</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_Russell3000IndexMember"
      decimals="4"
      id="h_635_b465baec_4c98_4f5e_9c91_4f3a5d7e0764"
      unitRef="pure">0.1182</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_Russell3000IndexMember"
      decimals="4"
      id="h_636_d6f48b77_51ec_42aa_bb82_e5ba10a83a14"
      unitRef="pure">0.1456</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_296_bdf25069_1b27_482a_9858_a6b2dbc54ca1">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:7.5pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt; &lt;b&gt;Visit&#160;&lt;/b&gt; &lt;b&gt; &lt;span style="color:rgb(0, 60, 113);white-space:nowrap;text-decoration-line:underline"&gt;www.ftportfolios.com/etf/FYC&lt;/span&gt; &lt;/b&gt; &lt;b&gt; for more recent performance information.&lt;/b&gt; &lt;/div&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000099061Member"
      id="t_297_bce5c94f_88d0_450f_97cd_517dd01d2af0">The Fund&#x2019;s past performance is not a good predictor of the Fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_298_3c35be3f_7c2c_4563_8251_46a387b98335">The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_299_49a7e1ca_69d4_4732_ae80_c78fdb07de34">&lt;div style="margin-top:10pt;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;KEY FUND STATISTICS (As of July 31, 2026)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Fund net assets&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,321,993,861&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total number of portfolio holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;266&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:0.5pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Total advisory fee paid&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;5,962,456&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-width:initial;border-bottom-color:initial;border-bottom-style:none"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; color: rgb(0, 0, 0); text-align: left; width: 60%; font-style: normal; font-weight: bold;"&gt;Portfolio turnover rate&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 10pt; padding-bottom: 3pt; padding-left: 10pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;127&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260731_C000099061Member"
      decimals="INF"
      id="h_637_a83f8d21_03d7_458e_abd8_67c7f4659fc2"
      unitRef="USD">1321993861</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260731_C000099061Member"
      decimals="INF"
      id="h_638_6d9b4f62_717d_4988_ae68_c0b873ef2173"
      unitRef="Holding">266</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000099061Member"
      decimals="INF"
      id="h_639_5e8a08be_c260_407b_a227_c04d7a4f8301"
      unitRef="USD">5962456</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000099061Member"
      decimals="4"
      id="h_640_6ba984d8_6499_41a4_9a00_d4bb3dcc95cb"
      unitRef="pure">1.27</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_300_94a27d43_d2e7_4c2e_8803_2dd344bd60e9">&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:3pt;margin-left:0px;font-family:'times new roman';font-size:11.52pt;font-weight:bold;color:rgb(0, 60, 113);"&gt;WHAT DID THE FUND INVEST IN? (As of July 31, 2026)&lt;/div&gt;&lt;div style="margin-top:0px;margin-right:0px;margin-bottom:10pt;margin-left:0px;font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);font-family:'times new roman';"&gt;The tables below show the investment makeup of the Fund, representing the percentage of total investments (excluding repurchase agreements held as collateral for securities lending arrangements) of the Fund.&lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Acadian Asset Management, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Chefs&#x2019; Warehouse (The), Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;RingCentral, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Precigen, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;First Advantage Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Oscar Health, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AtaiBeckley, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;National HealthCare Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Liquidia Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:initial;border-bottom-style:none;border-bottom-width:initial"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;NeoGenomics, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:3pt;margin-right:0px;margin-bottom:5pt;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Sector Allocation&lt;/b&gt; &lt;/div&gt;&lt;div style="font-family:'times new roman';font-size:9pt;font-weight:normal;color:rgb(0, 0, 0);"&gt; &lt;img alt="Graphical Representation - Allocation 2 Chart" src="chartimages_12274265.jpg" style="width: 172.8pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:LargestHoldingsTableTextBlock
      contextRef="FY2026_C000099061Member"
      id="t_305_d7ab5d8f_e0f9_7e25_441c_55e31e6d7e13">&lt;div style="font-family:'times new roman';font-size:9pt;letter-spacing:1.25px;text-transform:uppercase;text-align:center;padding-bottom:5pt;font-weight:bold;color:rgb(0, 0, 0);margin-top:5pt;margin-right:0px;margin-bottom:0px;margin-left:0px;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt;"&gt; &lt;b&gt;Top Ten Holdings&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;page-break-inside:avoid"&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Acadian Asset Management, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Chefs&#x2019; Warehouse (The), Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;RingCentral, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Precigen, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;First Advantage Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Oscar Health, Inc., Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;AtaiBeckley, Inc.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;National HealthCare Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="break-inside:avoid-page;page-break-inside:avoid;height:auto;border-bottom-color:rgb(0, 0, 0);border-bottom-style:solid;border-bottom-width:1pt"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;Liquidia Corp.&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; text-align: right; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); white-space: nowrap;"&gt;0.7&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt;
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&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; padding-top: 6pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Times New Roman'; font-size: 9pt; font-weight: normal; color: rgb(0, 0, 0); text-align: left;"&gt;NeoGenomics, Inc.&lt;/td&gt;
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