RESTRUCTURING - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Restructuring Cost and Reserve [Line Items]
Total charges	$ 190	$ 312
Employee termination costs	132	217
Provision for restructuring	133	220
Integration expenses	41	71
Accelerated depreciation	15	14
Asset impairments	8	2
Cost of products sold
Restructuring Cost and Reserve [Line Items]
Total charges	2	14
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total charges	1	6
Research and development
Restructuring Cost and Reserve [Line Items]
Total charges	21	1
Other (income)/expense, net
Restructuring Cost and Reserve [Line Items]
Total charges	166	291
Other termination costs
Restructuring Cost and Reserve [Line Items]
Other termination costs	1	3
Other shutdown costs
Restructuring Cost and Reserve [Line Items]
Other termination costs	(7)	5
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total charges	143	68
Celgene and Other Acquisition Plans
Restructuring Cost and Reserve [Line Items]
Total charges	$ 47	$ 244