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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

X

- 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

X

- 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: