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ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS (Details) - USD ($) $ in Millions			1 Months Ended	3 Months Ended				9 Months Ended
	Feb. 22, 2023	Jan. 30, 2023	May 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jul. 31, 2020	Jun. 19, 2020
Business Combination, Separately Recognized Transactions [Line Items]
Acquired in-process research and development expenses				$ 91			$ 448	$ 808	$ 786
Other expense, net				72			$ 176	95	$ 571
Arcellx, Inc | Global Strategic Collaboration Agreement
Business Combination, Separately Recognized Transactions [Line Items]
Acquired in-process research and development expenses		$ 212
Maximum potential future milestone payments		835
Payments to acquire equity securities		$ 115
Revenue, performance obligation, percentage of U.S. profits		50.00%
Arcellx, Inc | Global Strategic Collaboration Agreement | Arcellx, Inc
Business Combination, Separately Recognized Transactions [Line Items]
Revenue, performance obligation, percentage of U.S. profits		50.00%
Pionyr Immunotherapeutics Inc
Business Combination, Separately Recognized Transactions [Line Items]
Estimated fair value											$ 70
Ownership percentage											49.90%
Other expense, net						$ 70
Tizona Therapeutics, Inc
Business Combination, Separately Recognized Transactions [Line Items]
Ownership percentage										49.90%
Estimated fair value										$ 41
Other expense, net				41
XinThera, Inc
Business Combination, Separately Recognized Transactions [Line Items]
Cash consideration			$ 200
Acquired in-process research and development expenses					$ 170
Maximum potential future milestone payments			$ 760
Tmunity Therapeutics
Business Combination, Separately Recognized Transactions [Line Items]
Cash consideration	$ 300
Acquired in-process research and development expenses						$ 244
Maximum potential future milestone payments				$ 1,000				$ 1,000

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