REVENUE - Disaggregation of Revenue by Product and Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from External Customer [Line Items]
Total Revenues	$ 45,006	$ 46,159	$ 46,385
United States
Revenue from External Customer [Line Items]
Total Revenues	31,555	31,828	29,214
International
Revenue from External Customer [Line Items]
Total Revenues	12,752	13,497	16,319
Other
Revenue from External Customer [Line Items]
Total Revenues	699	834	852
Eliquis
Revenue from External Customer [Line Items]
Total Revenues	12,206	11,789	10,762
Opdivo
Revenue from External Customer [Line Items]
Total Revenues	9,009	8,249	7,523
Orencia
Revenue from External Customer [Line Items]
Total Revenues	3,601	3,464	3,306
Pomalyst/Imnovid
Revenue from External Customer [Line Items]
Total Revenues	3,441	3,497	3,332
Yervoy
Revenue from External Customer [Line Items]
Total Revenues	2,238	2,131	2,026
Sprycel
Revenue from External Customer [Line Items]
Total Revenues	1,930	2,165	2,117
Mature and other brands
Revenue from External Customer [Line Items]
Total Revenues	1,895	2,045	2,234
In-line products
Revenue from External Customer [Line Items]
Total Revenues	34,320	33,340	31,300
Reblozyl
Revenue from External Customer [Line Items]
Total Revenues	1,008	717	551
Opdualag
Revenue from External Customer [Line Items]
Total Revenues	627	252	0
Abecma
Revenue from External Customer [Line Items]
Total Revenues	472	388	164
Zeposia
Revenue from External Customer [Line Items]
Total Revenues	434	250	134
Breyanzi
Revenue from External Customer [Line Items]
Total Revenues	364	182	87
Camzyos
Revenue from External Customer [Line Items]
Total Revenues	231	24	0
Sotyktu
Revenue from External Customer [Line Items]
Total Revenues	170	8	0
Onureg
Revenue from External Customer [Line Items]
Total Revenues	168	124	73
Inrebic
Revenue from External Customer [Line Items]
Total Revenues	110	85	74
Augtyro
Revenue from External Customer [Line Items]
Total Revenues	1	0	0
New product portfolio
Revenue from External Customer [Line Items]
Total Revenues	3,585	2,030	1,083
In-line products and new product portfolio
Revenue from External Customer [Line Items]
Total Revenues	37,905	35,370	32,383
Revlimid
Revenue from External Customer [Line Items]
Total Revenues	6,097	9,978	12,821
Abraxane
Revenue from External Customer [Line Items]
Total Revenues	1,004	811	1,181
Total Recent LOE Products
Revenue from External Customer [Line Items]
Total Revenues	$ 7,101	$ 10,789	$ 14,002