<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:t="http://att.com/20260611"
  xmlns:us-gaap="http://fasb.org/us-gaap/2025"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="t-20260611.xsd" xlink:type="simple"/>
    <context id="duration_2026-06-11_to_2026-06-11">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesAPreferredStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:SeriesAPreferredStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesCPreferredStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:SeriesCPreferredStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember52026Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc1800GlobalNotesDueSeptember52026Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2900GlobalNotesDueDecember42026Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc2900GlobalNotesDueDecember42026Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTIncFloatingRateGlobalNotesDueSeptember162027Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTIncFloatingRateGlobalNotesDueSeptember162027Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1600GlobalNotesDueMay192028Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc1600GlobalNotesDueMay192028Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2350GlobalNotesDueSeptember52029Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc2350GlobalNotesDueSeptember52029Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4375GlobalNotesDueSeptember142029Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4375GlobalNotesDueSeptember142029Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueDecember172029Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc2600GlobalNotesDueDecember172029Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc0800GlobalNotesDueMarch42030Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc0800GlobalNotesDueMarch42030Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc.3.150GlobalNotesDueJune12030Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc.3.150GlobalNotesDueJune12030Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3950GlobalNotesDueApril302031Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc3950GlobalNotesDueApril302031Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2050GlobalNotesDueMay192032Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc2050GlobalNotesDueMay192032Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3550GlobalNotesDueDecember172032Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc3550GlobalNotesDueDecember172032Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3.600GlobalNotesDueJune12033Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc3.600GlobalNotesDueJune12033Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5200GlobalNotesDueNovember182033Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc5200GlobalNotesDueNovember182033Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3375GlobalNotesDueMarch152034Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc3375GlobalNotesDueMarch152034Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4300GlobalNotesDueNovember182034Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4300GlobalNotesDueNovember182034Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2450GlobalNotesDueMarch152035Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc2450GlobalNotesDueMarch152035Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3150GlobalNotesDueSeptember42036Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc3150GlobalNotesDueSeptember42036Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4.050GlobalNotesDueJune12037Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4.050GlobalNotesDueJune12037Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueMay192038Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc2600GlobalNotesDueMay192038Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember142039Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc1800GlobalNotesDueSeptember142039Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc7000GlobalNotesDueApril302040Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc7000GlobalNotesDueApril302040Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueJune12043Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4250GlobalNotesDueJune12043Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4875GlobalNotesDueJune12044Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4875GlobalNotesDueJune12044Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4000GlobalNotesDueJune12049Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4000GlobalNotesDueJune12049Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueMarch12050Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc4250GlobalNotesDueMarch12050Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3750GlobalNotesDueSeptember12050Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc3750GlobalNotesDueSeptember12050Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <context id="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5350GlobalNotesDueNovember12066Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000732717</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">t:ATTInc5350GlobalNotesDueNovember12066Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-11</startDate>
            <endDate>2026-06-11</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="duration_2026-06-11_to_2026-06-11"
      id="Hidden_dei_EntityCentralIndexKey">0000732717</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="duration_2026-06-11_to_2026-06-11"
      id="Hidden_dei_AmendmentFlag">false</dei:AmendmentFlag>
    <dei:DocumentType contextRef="duration_2026-06-11_to_2026-06-11" id="Fact_1">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2026-06-11_to_2026-06-11" id="Fact_0">2026-06-11</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-694">AT&amp;T INC.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-695">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-696">001-08610</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-697">43-1301883</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-698">208 S. Akard St.</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-699">Dallas</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-700">TX</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-701">75202</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-702">210</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-703">821-4105</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-704">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-705">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-706">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-707">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember"
      id="ixv-708">Common Shares (Par Value $1.00 Per Share)</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember"
      id="ixv-709">T</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember"
      id="ixv-710">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesAPreferredStockMember"
      id="ixv-711">Depositary Shares, each representing a 1/1000th interest in a share of 5.000% Perpetual Preferred Stock, Series A</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesAPreferredStockMember"
      id="ixv-712">T PRA</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesAPreferredStockMember"
      id="ixv-713">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesCPreferredStockMember"
      id="ixv-714">Depositary Shares, each representing a 1/1000th interest in a share of 4.750% Perpetual Preferred Stock, Series C</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesCPreferredStockMember"
      id="ixv-715">T PRC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_us-gaap-SeriesCPreferredStockMember"
      id="ixv-716">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember52026Member"
      id="ixv-717">AT&amp;T Inc. 1.800% Global Notes due September&#160;5, 2026</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember52026Member"
      id="ixv-718">T 26D</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember52026Member"
      id="ixv-719">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2900GlobalNotesDueDecember42026Member"
      id="ixv-720">AT&amp;T Inc. 2.900% Global Notes due December&#160;4, 2026</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2900GlobalNotesDueDecember42026Member"
      id="ixv-721">T 26A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2900GlobalNotesDueDecember42026Member"
      id="ixv-722">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTIncFloatingRateGlobalNotesDueSeptember162027Member"
      id="ixv-723">AT&amp;T Inc. Floating Rate Global Notes due September&#160;16, 2027</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTIncFloatingRateGlobalNotesDueSeptember162027Member"
      id="ixv-724">T 27C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTIncFloatingRateGlobalNotesDueSeptember162027Member"
      id="ixv-725">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1600GlobalNotesDueMay192028Member"
      id="ixv-726">AT&amp;T Inc. 1.600% Global Notes due May&#160;19, 2028</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1600GlobalNotesDueMay192028Member"
      id="ixv-727">T 28C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1600GlobalNotesDueMay192028Member"
      id="ixv-728">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2350GlobalNotesDueSeptember52029Member"
      id="ixv-729">AT&amp;T Inc. 2.350% Global Notes due September&#160;5, 2029</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2350GlobalNotesDueSeptember52029Member"
      id="ixv-730">T 29D</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2350GlobalNotesDueSeptember52029Member"
      id="ixv-731">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4375GlobalNotesDueSeptember142029Member"
      id="ixv-732">AT&amp;T Inc. 4.375% Global Notes due September&#160;14, 2029</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4375GlobalNotesDueSeptember142029Member"
      id="ixv-733">T 29B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4375GlobalNotesDueSeptember142029Member"
      id="ixv-734">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueDecember172029Member"
      id="ixv-735">AT&amp;T Inc. 2.600% Global Notes due December&#160;17, 2029</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueDecember172029Member"
      id="ixv-736">T 29A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueDecember172029Member"
      id="ixv-737">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc0800GlobalNotesDueMarch42030Member"
      id="ixv-738">AT&amp;T Inc. 0.800% Global Notes due March&#160;4, 2030</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc0800GlobalNotesDueMarch42030Member"
      id="ixv-739">T 30B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc0800GlobalNotesDueMarch42030Member"
      id="ixv-740">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc.3.150GlobalNotesDueJune12030Member"
      id="ixv-741">AT&amp;T Inc. 3.150% Global Notes due June&#160;1, 2030</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc.3.150GlobalNotesDueJune12030Member"
      id="ixv-742">T 30C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc.3.150GlobalNotesDueJune12030Member"
      id="ixv-743">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3950GlobalNotesDueApril302031Member"
      id="ixv-744">AT&amp;T Inc. 3.950% Global Notes due April&#160;30, 2031</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3950GlobalNotesDueApril302031Member"
      id="ixv-745">T 31F</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3950GlobalNotesDueApril302031Member"
      id="ixv-746">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2050GlobalNotesDueMay192032Member"
      id="ixv-747">AT&amp;T Inc. 2.050% Global Notes due May&#160;19, 2032</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2050GlobalNotesDueMay192032Member"
      id="ixv-748">T 32A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2050GlobalNotesDueMay192032Member"
      id="ixv-749">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3550GlobalNotesDueDecember172032Member"
      id="ixv-750">AT&amp;T Inc. 3.550% Global Notes due December&#160;17, 2032</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3550GlobalNotesDueDecember172032Member"
      id="ixv-751">T 32</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3550GlobalNotesDueDecember172032Member"
      id="ixv-752">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3.600GlobalNotesDueJune12033Member"
      id="ixv-753">AT&amp;T Inc. 3.600% Global Notes due June&#160;1, 2033</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3.600GlobalNotesDueJune12033Member"
      id="ixv-754">T 33A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3.600GlobalNotesDueJune12033Member"
      id="ixv-755">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5200GlobalNotesDueNovember182033Member"
      id="ixv-756">AT&amp;T Inc. 5.200% Global Notes due November&#160;18, 2033</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5200GlobalNotesDueNovember182033Member"
      id="ixv-757">T 33</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5200GlobalNotesDueNovember182033Member"
      id="ixv-758">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3375GlobalNotesDueMarch152034Member"
      id="ixv-759">AT&amp;T Inc. 3.375% Global Notes due March&#160;15, 2034</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3375GlobalNotesDueMarch152034Member"
      id="ixv-760">T 34</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3375GlobalNotesDueMarch152034Member"
      id="ixv-761">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4300GlobalNotesDueNovember182034Member"
      id="ixv-762">AT&amp;T Inc. 4.300% Global Notes due November&#160;18, 2034</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4300GlobalNotesDueNovember182034Member"
      id="ixv-763">T 34C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4300GlobalNotesDueNovember182034Member"
      id="ixv-764">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2450GlobalNotesDueMarch152035Member"
      id="ixv-765">AT&amp;T Inc. 2.450% Global Notes due March&#160;15, 2035</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2450GlobalNotesDueMarch152035Member"
      id="ixv-766">T 35</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2450GlobalNotesDueMarch152035Member"
      id="ixv-767">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3150GlobalNotesDueSeptember42036Member"
      id="ixv-768">AT&amp;T Inc. 3.150% Global Notes due September&#160;4, 2036</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3150GlobalNotesDueSeptember42036Member"
      id="ixv-769">T 36A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3150GlobalNotesDueSeptember42036Member"
      id="ixv-770">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4.050GlobalNotesDueJune12037Member"
      id="ixv-771">AT&amp;T Inc. 4.050% Global Notes due June&#160;1, 2037</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4.050GlobalNotesDueJune12037Member"
      id="ixv-772">T 37B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4.050GlobalNotesDueJune12037Member"
      id="ixv-773">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueMay192038Member"
      id="ixv-774">AT&amp;T Inc. 2.600% Global Notes due May&#160;19, 2038</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueMay192038Member"
      id="ixv-775">T 38C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc2600GlobalNotesDueMay192038Member"
      id="ixv-776">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember142039Member"
      id="ixv-777">AT&amp;T Inc. 1.800% Global Notes due September&#160;14, 2039</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember142039Member"
      id="ixv-778">T 39B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc1800GlobalNotesDueSeptember142039Member"
      id="ixv-779">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc7000GlobalNotesDueApril302040Member"
      id="ixv-780">AT&amp;T Inc. 7.000% Global Notes due April&#160;30, 2040</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc7000GlobalNotesDueApril302040Member"
      id="ixv-781">T 40</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc7000GlobalNotesDueApril302040Member"
      id="ixv-782">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueJune12043Member"
      id="ixv-783">AT&amp;T Inc. 4.250% Global Notes due June&#160;1, 2043</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueJune12043Member"
      id="ixv-784">T 43</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueJune12043Member"
      id="ixv-785">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4875GlobalNotesDueJune12044Member"
      id="ixv-786">AT&amp;T Inc. 4.875% Global Notes due June&#160;1, 2044</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4875GlobalNotesDueJune12044Member"
      id="ixv-787">T 44</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4875GlobalNotesDueJune12044Member"
      id="ixv-788">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4000GlobalNotesDueJune12049Member"
      id="ixv-789">AT&amp;T Inc. 4.000% Global Notes due June&#160;1, 2049</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4000GlobalNotesDueJune12049Member"
      id="ixv-790">T 49A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4000GlobalNotesDueJune12049Member"
      id="ixv-791">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueMarch12050Member"
      id="ixv-792">AT&amp;T Inc. 4.250% Global Notes due March&#160;1, 2050</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueMarch12050Member"
      id="ixv-793">T 50</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc4250GlobalNotesDueMarch12050Member"
      id="ixv-794">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3750GlobalNotesDueSeptember12050Member"
      id="ixv-795">AT&amp;T Inc. 3.750% Global Notes due September&#160;1, 2050</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3750GlobalNotesDueSeptember12050Member"
      id="ixv-796">T 50A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc3750GlobalNotesDueSeptember12050Member"
      id="ixv-797">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5350GlobalNotesDueNovember12066Member"
      id="ixv-798">AT&amp;T Inc. 5.350% Global Notes due November&#160;1, 2066</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5350GlobalNotesDueNovember12066Member"
      id="ixv-799">TBB</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-06-11_to_2026-06-11_us-gaap-StatementClassOfStockAxis_t-ATTInc5350GlobalNotesDueNovember12066Member"
      id="ixv-800">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2026-06-11_to_2026-06-11" id="ixv-801">false</dei:EntityEmergingGrowthCompany>
</xbrl>
