<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:bmy="http://bms.com/20250721"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  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="bmy-20250721.xsd" xlink:type="simple"/>
    <context id="c20250721to20250721">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000014272</identifier>
        </entity>
        <period>
            <startDate>2025-07-21</startDate>
            <endDate>2025-07-21</endDate>
        </period>
    </context>
    <context id="c20250721to20250721_StatementClassOfStockAxis_CelgeneContingentValueRightsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000014272</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">bmy:CelgeneContingentValueRightsMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-07-21</startDate>
            <endDate>2025-07-21</endDate>
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    </context>
    <context id="c20250721to20250721_StatementClassOfStockAxis_One750NotesDue2035Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000014272</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">bmy:One750NotesDue2035Member</xbrldi:explicitMember>
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        </entity>
        <period>
            <startDate>2025-07-21</startDate>
            <endDate>2025-07-21</endDate>
        </period>
    </context>
    <context id="c20250721to20250721_StatementClassOfStockAxis_CommonStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000014272</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
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        </entity>
        <period>
            <startDate>2025-07-21</startDate>
            <endDate>2025-07-21</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="c20250721to20250721"
      id="Fact_cb32426701f84e5d8d23c84bfc779fd9">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="c20250721to20250721"
      id="Fact_82f6691d1b7441b8b7f946e5711e0f84">0000014272</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="c20250721to20250721"
      id="Fact_6a9f167b258345a7bbba91884685ecf5">8-K</dei:DocumentType>
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      contextRef="c20250721to20250721"
      id="Fact_e5facf8b5e844da4948aaa529a8e2c80">2025-07-21</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="c20250721to20250721"
      id="Fact_e3fd6f92180e4678a60a217dd81f546e">BRISTOL-MYERS SQUIBB COMPANY</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="c20250721to20250721"
      id="Fact_c3588bb4ced94cb3bc5827a274adcaae">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="c20250721to20250721"
      id="Fact_0b5acd491209425fb38999c9e24d37fd">001-01136</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="c20250721to20250721"
      id="Fact_a15d080513bd456bb6411d3a9f881ec4">22-0790350</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="c20250721to20250721"
      id="Fact_8334419534ba4c9d80326da58be5cdac">Route 206 &amp; Province Line Road</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="c20250721to20250721"
      id="Fact_a4834e037cb84606aa0c2bc054fadb87">Princeton</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="c20250721to20250721"
      id="Fact_bc07fcd45779403eb123a232909d138a">NJ</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="c20250721to20250721"
      id="Fact_2802da761aff43648994309f96dd633a">08543</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="c20250721to20250721"
      id="Fact_9f5eea3d5fa742f9bc57f63c9b85f74f">609</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="c20250721to20250721"
      id="Fact_f421f9092f6f4ecbb25a045233e829b3">252-4621</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="c20250721to20250721"
      id="Fact_6ab6720169a0419ab2e651eac5ef96f6">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="c20250721to20250721"
      id="Fact_ccf2f4d50b8b4de090e0aba08c6ebc98">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="c20250721to20250721"
      id="Fact_7a5276fcb82d484b8b7c2f197775a584">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="c20250721to20250721"
      id="Fact_a966666251a64bdf97beec2ffca12704">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="c20250721to20250721_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_fef8eceff4f947e5b67d2557eac3a0aa">Common Stock, $0.10 Par Value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20250721to20250721_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_98a4fa4074bd4998a9792ab31168c66f">BMY</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20250721to20250721_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_46ad9c871b934aeca03a0ce2c9c9d390">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="c20250721to20250721_StatementClassOfStockAxis_One750NotesDue2035Member"
      id="Fact_af4dea79e4664ac682a6ac014d45ac1e">1.750% Notes due 2035</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20250721to20250721_StatementClassOfStockAxis_One750NotesDue2035Member"
      id="Fact_2351ecb47df5401dafbdc3f3512e3934">BMY35</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20250721to20250721_StatementClassOfStockAxis_One750NotesDue2035Member"
      id="Fact_c774546f38ee43bbaae6952508603997">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="c20250721to20250721_StatementClassOfStockAxis_CelgeneContingentValueRightsMember"
      id="Fact_cd088da9099d415ca18d656c0d221fb3">Celgene Contingent Value Rights</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20250721to20250721_StatementClassOfStockAxis_CelgeneContingentValueRightsMember"
      id="Fact_b5828b5e15d94fab9af028495a139bda">CELG RT</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20250721to20250721_StatementClassOfStockAxis_CelgeneContingentValueRightsMember"
      id="Fact_b65b534c214c4bb68190356c7acfc197">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="c20250721to20250721"
      id="Fact_3dcdf6696b244a859f8b433f609e17b0">false</dei:EntityEmergingGrowthCompany>
</xbrl>
