REVENUE RECOGNITION Revenue by Product by Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from External Customer [Line Items]
Total Revenues	$ 11,624	$ 10,540	$ 34,400	$ 31,450
Revlimid [Member]
Revenue from External Customer [Line Items]
Total Revenues	3,347	3,027	9,493	8,826
Eliquis [Member]
Revenue from External Customer [Line Items]
Total Revenues	2,413	2,095	8,091	6,899
Opdivo [Member]
Revenue from External Customer [Line Items]
Total Revenues	1,905	1,780	5,535	5,199
Orencia [Member]
Revenue from External Customer [Line Items]
Total Revenues	870	826	2,442	2,290
Pomalyst/Imnovid [Member]
Revenue from External Customer [Line Items]
Total Revenues	851	777	2,478	2,235
Sprycel [Member]
Revenue from External Customer [Line Items]
Total Revenues	551	544	1,562	1,576
Yervoy [Member]
Revenue from External Customer [Line Items]
Total Revenues	515	446	1,481	1,211
Abraxane [Member]
Revenue from External Customer [Line Items]
Total Revenues	266	342	876	950
Empliciti [Member]
Revenue from External Customer [Line Items]
Total Revenues	82	96	253	290
Reblozyl [Member]
Revenue from External Customer [Line Items]
Total Revenues	160	96	400	159
Inrebic [Member]
Revenue from External Customer [Line Items]
Total Revenues	22	13	54	40
Onureg [Member]
Revenue from External Customer [Line Items]
Total Revenues	21	3	48	3
Zeposia [Member]
Revenue from External Customer [Line Items]
Total Revenues	40	2	86	3
Breyanzi
Revenue from External Customer [Line Items]
Total Revenues	30	0	47	0
Abecma
Revenue from External Customer [Line Items]
Total Revenues	71	0	95	0
Vidaza [Member]
Revenue from External Customer [Line Items]
Total Revenues	36	106	135	390
Baraclude [Member]
Revenue from External Customer [Line Items]
Total Revenues	105	100	327	343
Mature Products And All Other [Member]
Revenue from External Customer [Line Items]
Total Revenues	339	287	997	1,036
UNITED STATES
Revenue from External Customer [Line Items]
Total Revenues	7,296	6,542	21,694	19,795
Europe
Revenue from External Customer [Line Items]
Total Revenues	2,661	2,453	7,903	7,156
Rest Of World [Member]
Revenue from External Customer [Line Items]
Total Revenues	1,391	1,361	4,172	4,030
Other Region [Member]
Revenue from External Customer [Line Items]
Total Revenues	$ 276	$ 184	$ 631	$ 469