REVENUE - Disaggregation of Revenue by Product and Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue from External Customer [Line Items]
Total Revenues	$ 12,222	$ 11,892	$ 35,692	$ 35,958
Performance obligation satisfied in previous period	318	238	992	496
United States
Revenue from External Customer [Line Items]
Total Revenues	8,329	8,232	24,721	25,509
International
Revenue from External Customer [Line Items]
Total Revenues	3,602	3,389	10,193	9,803
Other
Revenue from External Customer [Line Items]
Total Revenues	290	271	778	646
Growth Portfolio
Revenue from External Customer [Line Items]
Total Revenues	6,857	5,812	19,016	16,200
Opdivo
Revenue from External Customer [Line Items]
Total Revenues	2,532	2,360	7,356	6,825
Opdivo Qvantig
Revenue from External Customer [Line Items]
Total Revenues	67	0	105	0
Orencia
Revenue from External Customer [Line Items]
Total Revenues	964	936	2,697	2,682
Yervoy
Revenue from External Customer [Line Items]
Total Revenues	739	642	2,090	1,855
Reblozyl
Revenue from External Customer [Line Items]
Total Revenues	615	447	1,661	1,226
Opdualag
Revenue from External Customer [Line Items]
Total Revenues	299	233	835	674
Breyanzi
Revenue from External Customer [Line Items]
Total Revenues	359	224	966	484
Camzyos
Revenue from External Customer [Line Items]
Total Revenues	296	156	714	379
Zeposia
Revenue from External Customer [Line Items]
Total Revenues	161	147	418	408
Abecma
Revenue from External Customer [Line Items]
Total Revenues	137	124	326	301
Sotyktu
Revenue from External Customer [Line Items]
Total Revenues	80	66	206	163
Krazati
Revenue from External Customer [Line Items]
Total Revenues	53	34	149	87
Cobenfy
Revenue from External Customer [Line Items]
Total Revenues	43	0	105	0
Other Growth products
Revenue from External Customer [Line Items]
Total Revenues	514	443	1,388	1,116
Legacy Portfolio
Revenue from External Customer [Line Items]
Total Revenues	5,365	6,080	16,676	19,758
Eliquis
Revenue from External Customer [Line Items]
Total Revenues	3,746	3,002	10,991	10,138
Revlimid
Revenue from External Customer [Line Items]
Total Revenues	575	1,412	2,349	4,434
Pomalyst/Imnovid
Revenue from External Customer [Line Items]
Total Revenues	675	898	2,041	2,722
Sprycel
Revenue from External Customer [Line Items]
Total Revenues	119	290	413	1,088
Abraxane
Revenue from External Customer [Line Items]
Total Revenues	74	253	284	701
Other Legacy products
Revenue from External Customer [Line Items]
Total Revenues	$ 177	$ 225	$ 599	$ 675