REVENUE - Disaggregation of Revenue by Product and Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from External Customer [Line Items]
Total revenues	$ 11,226	$ 11,887	$ 22,563	$ 23,535
Performance obligation satisfied in previous period	75	184	241	331
United States
Revenue from External Customer [Line Items]
Total revenues	7,891	8,268	15,924	15,962
International
Revenue from External Customer [Line Items]
Total revenues	3,160	3,427	6,309	7,154
Other
Revenue from External Customer [Line Items]
Total revenues	175	192	330	419
In-Line Products
Revenue from External Customer [Line Items]
Total revenues	8,638	8,663	17,263	16,950
Eliquis
Revenue from External Customer [Line Items]
Total revenues	3,204	3,235	6,627	6,446
Opdivo
Revenue from External Customer [Line Items]
Total revenues	2,145	2,063	4,347	3,986
Pomalyst/Imnovid
Revenue from External Customer [Line Items]
Total revenues	847	908	1,679	1,734
Orencia
Revenue from External Customer [Line Items]
Total revenues	927	876	1,691	1,668
Sprycel
Revenue from External Customer [Line Items]
Total revenues	458	544	887	1,027
Yervoy
Revenue from External Customer [Line Items]
Total revenues	585	525	1,093	1,040
Mature and other products
Revenue from External Customer [Line Items]
Total revenues	472	512	939	1,049
New Product Portfolio
Revenue from External Customer [Line Items]
Total revenues	862	482	1,585	832
Reblozyl
Revenue from External Customer [Line Items]
Total revenues	234	172	440	328
Abecma
Revenue from External Customer [Line Items]
Total revenues	132	89	279	156
Opdualag
Revenue from External Customer [Line Items]
Total revenues	154	58	271	64
Zeposia
Revenue from External Customer [Line Items]
Total revenues	100	66	178	102
Breyanzi
Revenue from External Customer [Line Items]
Total revenues	100	39	171	83
Onureg
Revenue from External Customer [Line Items]
Total revenues	44	32	78	55
Inrebic
Revenue from External Customer [Line Items]
Total revenues	27	23	52	41
Camzyos
Revenue from External Customer [Line Items]
Total revenues	46	3	75	3
Sotyktu
Revenue from External Customer [Line Items]
Total revenues	25	0	41	0
Total In-Line Products and New Product Portfolio
Revenue from External Customer [Line Items]
Total revenues	9,500	9,145	18,848	17,782
Recent LOE Products
Revenue from External Customer [Line Items]
Total revenues	1,726	2,742	3,715	5,753
Revlimid
Revenue from External Customer [Line Items]
Total revenues	1,468	2,501	3,218	5,298
Abraxane
Revenue from External Customer [Line Items]
Total revenues	$ 258	$ 241	$ 497	$ 455