RESTRUCTURING - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Restructuring Cost and Reserve [Line Items]
Total charges	$ 280	$ 131	$ 649	$ 409
Employee termination costs	135	16	309	57
Provision for restructuring	141	17	321	60
Integration expenses	54	114	180	343
Accelerated depreciation	15	0	28	6
Asset impairments	70	0	120	0
Other termination costs
Restructuring Cost and Reserve [Line Items]
Other termination costs	6	1	12	3
Facility Closing
Restructuring Cost and Reserve [Line Items]
Asset impairments	65
Cost of products sold
Restructuring Cost and Reserve [Line Items]
Total charges	16	0	53	0
Marketing, selling and administrative
Restructuring Cost and Reserve [Line Items]
Total charges	65	0	85	6
Research and development
Restructuring Cost and Reserve [Line Items]
Total charges	4	0	10	0
Other (income)/expense, net
Restructuring Cost and Reserve [Line Items]
Total charges	195	131	501	403
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total charges	149	0	380	0
Celgene and Other Acquisition Plans
Restructuring Cost and Reserve [Line Items]
Total charges	$ 131	$ 131	$ 269	$ 409