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ALLIANCES - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024
SystImmune |  |
Alliance Statement [Line Items] |  |
Upfront fee made to collaborative partner |  | $ 800
Consideration for contingent development and regulatory approval |  | 7,600
Eisai |  |
Alliance Statement [Line Items] |  |
Income related to collaboration termination |  | $ 90
Collaboration arrangement, termination payment received | $ 85 |

X
- Definition Collaboration Arrangement, Termination Payment Received + References No definition available. + Details
Name: | bmy_CollaborationArrangementTerminationPaymentReceived
Namespace Prefix: | bmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This element represents that additional aggregate consideration for contingent development and regulatory approval milestone payments. + References No definition available. + Details
Name: | bmy_ConsiderationForContingentDevelopmentAndRegulatoryApproval
Namespace Prefix: | bmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gain (Loss) On Termination Of Collaborative Arrangement + References No definition available. + Details
Name: | bmy_GainLossOnTerminationOfCollaborativeArrangement
Namespace Prefix: | bmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Upfront payments made to partner as part of collaborative arrangement. + References No definition available. + Details
Name: | bmy_UpfrontFeeMadeToCollaborativePartner
Namespace Prefix: | bmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | bmy_AlliancesAndCollaborationCompaniesAxis=bmy_SystImmuneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bmy_AlliancesAndCollaborationCompaniesAxis=bmy_EisaiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |