RESTRUCTURING - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Total charges	$ 148	$ 219	$ 278	$ 429
Employee termination costs	19	75	41	119
Other termination costs	1	3	2	4
Provision for restructuring	20	78	43	123
Integration expenses	124	152	229	293
Accelerated depreciation	4	0	6	0
Asset impairments	0	0	0	24
Other shutdown costs, net	0	(11)	0	(11)
Cost of products sold
Restructuring Cost and Reserve [Line Items]
Total charges	0	0	0	24
Marketing, selling and administrative
Restructuring Cost and Reserve [Line Items]
Total charges	4	0	6	0
Other (income)/expense, net
Restructuring Cost and Reserve [Line Items]
Total charges	144	219	272	405
Celgene Acquisition Plan
Restructuring Cost and Reserve [Line Items]
Total charges	146	200	273	373
MyoKardia Acquisition Plan
Restructuring Cost and Reserve [Line Items]
Total charges	$ 2	$ 19	$ 5	$ 56