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LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions	1 Months Ended
	May 31, 2024 USD ($)	Feb. 28, 2021 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2018 lawsuit
Legal Proceedings And Contingencies [Line Items]
Obligation to holders of the contingent value rights				$ 6,400
Future costs			$ 66
Attorney General of Hawaii v. Bristol-Myers Squibb and Sanofi
Legal Proceedings And Contingencies [Line Items]
Litigation settlement, amount awarded to other party	$ 458	$ 417
Attorney General of Hawaii v. Bristol-Myers Squibb and Sanofi | BMS and Sanofi
Legal Proceedings And Contingencies [Line Items]
Litigation settlement, amount awarded to other party	$ 916	$ 834
Celgene Securities Class Action
Legal Proceedings And Contingencies [Line Items]
Loss contingency, pending claims, number, putative class | lawsuit					2

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-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.9-03(15)(5))
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-Topic 235
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