RESTRUCTURING - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Total charges	$ 777	$ 520	$ 751
Employee termination costs	350	69	159
Provision for restructuring	365	75	169
Integration expenses	242	440	564
Accelerated depreciation	42	5	2
Asset impairments	126	0	24
Other shutdown costs, net	2	0	(8)
Other Termination Costs
Restructuring Cost and Reserve [Line Items]
Other termination costs	15	6	10
Cost of products sold
Restructuring Cost and Reserve [Line Items]
Total charges	64	0	24
Marketing, selling and administrative
Restructuring Cost and Reserve [Line Items]
Total charges	94	5	3
Research and development
Restructuring Cost and Reserve [Line Items]
Total charges	12	0	0
Other (income)/expense, net
Restructuring Cost and Reserve [Line Items]
Total charges	607	515	724
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total charges	442	0	0
Celgene and Other Acquisition Plans
Restructuring Cost and Reserve [Line Items]
Total charges	$ 335	$ 520	$ 751