<?xml version="1.0" encoding="utf-8"?>
<xbrl
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            <identifier scheme="http://www.sec.gov/CIK">0002117535</identifier>
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            <endDate>2026-09-01</endDate>
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    <context id="offrl_1">
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            <startDate>2026-09-01</startDate>
            <endDate>2026-09-01</endDate>
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            <startDate>2026-09-01</startDate>
            <endDate>2026-09-01</endDate>
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            <identifier scheme="http://www.sec.gov/CIK">0002117535</identifier>
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            <startDate>2026-09-01</startDate>
            <endDate>2026-09-01</endDate>
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    <context id="offrl_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002117535</identifier>
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        <period>
            <startDate>2026-09-01</startDate>
            <endDate>2026-09-01</endDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
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    <unit id="pure">
        <measure>pure</measure>
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    <ffd:SubmissnTp contextRef="rc" id="ixv-383">N-2/A</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-384">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:RegnFileNb contextRef="rc" id="ixv-385">333-294491</ffd:RegnFileNb>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-386">0002117535</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-387">Franklin Lexington Venture &amp; Growth Fund</dei:EntityRegistrantName>
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    <ffd:FormTp contextRef="rc" id="ixv-442">N-2</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-443">Franklin Lexington Venture &amp; Growth Fund</dei:EntityRegistrantName>
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    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-446">Common Stock</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_1" id="ixv-447">true</ffd:Rule457oFlg>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-448"
      unitRef="USD">1999000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-449"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-450"
      unitRef="USD">276061.90</ffd:FeeAmt>
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    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-452">Other</ffd:OfferingSctyTp>
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      contextRef="offrl_2"
      decimals="2"
      id="ixv-455"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_2"
      decimals="7"
      id="ixv-456"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_2"
      decimals="2"
      id="ixv-457"
      unitRef="USD">0.00</ffd:FeeAmt>
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    <ffd:OfferingSctyTp contextRef="offrl_3" id="ixv-459">Equity</ffd:OfferingSctyTp>
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      contextRef="offrl_3"
      decimals="2"
      id="ixv-462"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_3"
      decimals="7"
      id="ixv-463"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_3"
      decimals="2"
      id="ixv-464"
      unitRef="USD">0.00</ffd:FeeAmt>
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    <ffd:OfferingSctyTp contextRef="offrl_4" id="ixv-466">Equity</ffd:OfferingSctyTp>
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    <ffd:Rule457oFlg contextRef="offrl_4" id="ixv-468">true</ffd:Rule457oFlg>
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      contextRef="offrl_4"
      decimals="2"
      id="ixv-469"
      unitRef="USD">1000000.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_4"
      decimals="2"
      id="ixv-470"
      unitRef="USD">138.10</ffd:FeeAmt>
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    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-474" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-475" unitRef="USD">276061.90</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-476">(1) This registration statement relates to the aggregate offering of $2,000,000,000 of common shares of beneficial interest of the Fund. (2) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-477">(1) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933. (2) No separate consideration will be received by the Registrant. Any shares issued pursuant to an offering of rights to purchase shares of common stock, including any shares issued pursuant to an over-subscription privilege or a secondary over-subscription privilege, will be shares registered under this Registration Statement.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-478">(1) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933.</ffd:OfferingNote>
</xbrl>
