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      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
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        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001053507</identifier>
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        <period>
            <startDate>2026-09-10</startDate>
            <endDate>2026-09-10</endDate>
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    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001053507</identifier>
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            <startDate>2026-09-10</startDate>
            <endDate>2026-09-10</endDate>
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    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001053507</identifier>
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            <startDate>2026-09-10</startDate>
            <endDate>2026-09-10</endDate>
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    <context id="offrl_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001053507</identifier>
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        <period>
            <startDate>2026-09-10</startDate>
            <endDate>2026-09-10</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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    <unit id="Shares">
        <measure>shares</measure>
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    <ffd:FormTp contextRef="rc" id="ixv-397">S-3</ffd:FormTp>
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    <ffd:FeeExhibitTp contextRef="rc" id="ixv-399">EX-FILING FEES</ffd:FeeExhibitTp>
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    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-401">0001053507</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-402">AMERICAN TOWER CORP /MA/</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
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    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-452">5.300% Senior Notes due 2031</ffd:OfferingSctyTitl>
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    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-454"
      unitRef="Shares">500000000</ffd:AmtSctiesRegd>
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      contextRef="offrl_1"
      decimals="5"
      id="ixv-455"
      unitRef="USD">0.99718</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-456"
      unitRef="USD">498590000.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_1"
      decimals="7"
      id="ixv-457"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-458"
      unitRef="USD">68855.28</ffd:FeeAmt>
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    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-460">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-461">5.560% Senior Notes due 2033</ffd:OfferingSctyTitl>
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      contextRef="offrl_2"
      decimals="0"
      id="ixv-463"
      unitRef="Shares">500000000</ffd:AmtSctiesRegd>
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      contextRef="offrl_2"
      decimals="5"
      id="ixv-464"
      unitRef="USD">0.99776</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_2"
      decimals="2"
      id="ixv-465"
      unitRef="USD">498880000.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_2"
      decimals="7"
      id="ixv-466"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_2"
      decimals="2"
      id="ixv-467"
      unitRef="USD">68895.33</ffd:FeeAmt>
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    <ffd:OfferingSctyTitl contextRef="offrl_3" id="ixv-470">5.750% Senior Notes due 2036</ffd:OfferingSctyTitl>
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      contextRef="offrl_3"
      decimals="0"
      id="ixv-472"
      unitRef="Shares">600000000</ffd:AmtSctiesRegd>
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      contextRef="offrl_3"
      decimals="5"
      id="ixv-473"
      unitRef="USD">0.99497</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_3"
      decimals="2"
      id="ixv-474"
      unitRef="USD">596982000.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_3"
      decimals="7"
      id="ixv-475"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_3"
      decimals="2"
      id="ixv-476"
      unitRef="USD">82443.21</ffd:FeeAmt>
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    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-478" unitRef="USD">220193.82</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-479" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
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    <ffd:OfferingNote contextRef="offrl_1" id="ixv-482">The maximum aggregate offering price of the offering related to the prospectus supplement dated September 9, 2026 to the prospectus dated June 2, 2025, to which this Exhibit 107 is attached, is $1,594,452,000.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-483">The maximum aggregate offering price of the offering related to the prospectus supplement dated September 9, 2026 to the prospectus dated June 2, 2025, to which this Exhibit 107 is attached, is $1,594,452,000.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-484">The maximum aggregate offering price of the offering related to the prospectus supplement dated September 9, 2026 to the prospectus dated June 2, 2025, to which this Exhibit 107 is attached, is $1,594,452,000.</ffd:OfferingNote>
    <ffd:NrrtvMaxAggtOfferingPric contextRef="rc" decimals="2" id="ixv-485" unitRef="USD">1594452000.00</ffd:NrrtvMaxAggtOfferingPric>
    <ffd:FnlPrspctsFlg contextRef="rc" id="ixv-486">true</ffd:FnlPrspctsFlg>
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