REVENUE - Disaggregation of Revenue by Product and Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from External Customer [Line Items]
Total revenues	$ 10,966	$ 11,218	$ 33,529	$ 34,753
Performance obligation satisfied in previous period	114	119	355	450
United States
Revenue from External Customer [Line Items]
Total revenues	7,628	7,941	23,552	23,903
International
Revenue from External Customer [Line Items]
Total revenues	3,153	3,062	9,462	10,216
Other
Revenue from External Customer [Line Items]
Total revenues	185	215	515	634
In-Line Products
Revenue from External Customer [Line Items]
Total revenues	8,349	8,068	25,612	25,018
Eliquis
Revenue from External Customer [Line Items]
Total revenues	2,705	2,655	9,332	9,101
Opdivo
Revenue from External Customer [Line Items]
Total revenues	2,275	2,047	6,622	6,033
Pomalyst/Imnovid
Revenue from External Customer [Line Items]
Total revenues	872	886	2,551	2,620
Orencia
Revenue from External Customer [Line Items]
Total revenues	925	883	2,616	2,551
Sprycel
Revenue from External Customer [Line Items]
Total revenues	517	560	1,404	1,587
Yervoy
Revenue from External Customer [Line Items]
Total revenues	579	523	1,672	1,563
Mature and other products
Revenue from External Customer [Line Items]
Total revenues	476	514	1,415	1,563
New Product Portfolio
Revenue from External Customer [Line Items]
Total revenues	928	553	2,513	1,385
Reblozyl
Revenue from External Customer [Line Items]
Total revenues	248	190	688	518
Abecma
Revenue from External Customer [Line Items]
Total revenues	93	107	372	263
Opdualag
Revenue from External Customer [Line Items]
Total revenues	166	84	437	148
Zeposia
Revenue from External Customer [Line Items]
Total revenues	123	69	301	171
Breyanzi
Revenue from External Customer [Line Items]
Total revenues	92	44	263	127
Onureg
Revenue from External Customer [Line Items]
Total revenues	43	32	121	87
Inrebic
Revenue from External Customer [Line Items]
Total revenues	29	21	81	62
Camzyos
Revenue from External Customer [Line Items]
Total revenues	68	5	143	8
Sotyktu
Revenue from External Customer [Line Items]
Total revenues	66	1	107	1
Total In-Line Products and New Product Portfolio
Revenue from External Customer [Line Items]
Total revenues	9,277	8,621	28,125	26,403
Recent LOE Products
Revenue from External Customer [Line Items]
Total revenues	1,689	2,597	5,404	8,350
Revlimid
Revenue from External Customer [Line Items]
Total revenues	1,429	2,420	4,647	7,718
Abraxane
Revenue from External Customer [Line Items]
Total revenues	$ 260	$ 177	$ 757	$ 632