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LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions, $ in Millions	1 Months Ended					2 Months Ended	3 Months Ended
	Mar. 31, 2024 USD ($) lawsuit plaintiff	Dec. 31, 2023 defendant plaintiff	Feb. 28, 2021 USD ($)	Mar. 31, 2010 AUD ($)	Mar. 31, 2010 USD ($)	Nov. 30, 2023 lawsuit healthcare_system	Mar. 31, 2024 USD ($) lawsuit patent	Nov. 30, 2022 lawsuit	Jun. 30, 2022 claim	Apr. 01, 2022	Nov. 30, 2021 acquirer lawsuit	Jun. 30, 2021 USD ($)	Mar. 31, 2018 lawsuit
Legal Proceedings And Contingencies [Line Items]
Damages sought \| $			$ 834
Class action claims								2
Obligation to holders of the contingent value rights \| $												$ 6,400
Number of healthcare systems \| healthcare_system						3
Running royalty										0.015
Accrued liabilities for CERCLA matters \| $	$ 79						$ 79
Bristol-Myers Squibb
Legal Proceedings And Contingencies [Line Items]
Damages sought \| $			$ 417
Plavix Australia Intellectual Property \| Australia, Dollars
Legal Proceedings And Contingencies [Line Items]
Damages paid \| $				$ 449
Plavix Australia Intellectual Property \| United States of America, Dollars
Legal Proceedings And Contingencies [Line Items]
Damages paid \| $					$ 293
Xspray
Legal Proceedings And Contingencies [Line Items]
Number of patents \| patent							2
Abilify Product Liability \| NEW JERSEY
Legal Proceedings And Contingencies [Line Items]
Individual injury claims	11						11
Abilify Product Liability \| CANADA
Legal Proceedings And Contingencies [Line Items]
Individual injury claims	7						7
Pending claims	11						11
Class action claims	4						4
Pending claims, active	2						2
Celgene Securities Class Action
Legal Proceedings And Contingencies [Line Items]
Putative claims													2
Celgene Contingent Value Rights
Legal Proceedings And Contingencies [Line Items]
Putative claims											2
Number of acquirers \| acquirer											1
Molina Litigation
Legal Proceedings And Contingencies [Line Items]
Class action claims \| claim									63
Dismissed cases \| claim									4
Opt-Out Entities
Legal Proceedings And Contingencies [Line Items]
Class action claims	2						2
Mayo Clinic, LifePoint Corporate Services, and Intermountain Health
Legal Proceedings And Contingencies [Line Items]
Class action claims						2
Pomalyst Antitrust Class Action
Legal Proceedings And Contingencies [Line Items]
Number of plaintiffs \| plaintiff	1	1
Loss contingency, number of defendants \| defendant		2