RESTRUCTURING - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]
Total charges	$ 312	$ 135
Employee termination costs	217	65
Provision for restructuring	220	67
Integration expenses	71	67
Accelerated depreciation	14	1
Asset impairments	2	0
Other termination costs
Restructuring Cost and Reserve [Line Items]
Other termination costs	3	2
Other shutdown costs
Restructuring Cost and Reserve [Line Items]
Other termination costs	5	0
Cost of products sold
Restructuring Cost and Reserve [Line Items]
Total charges	14	1
Marketing, selling and administrative
Restructuring Cost and Reserve [Line Items]
Total charges	6	0
Research and development
Restructuring Cost and Reserve [Line Items]
Total charges	1	0
Other (income)/expense, net
Restructuring Cost and Reserve [Line Items]
Total charges	291	134
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total charges	68	61
Celgene and Other Acquisition Plans
Restructuring Cost and Reserve [Line Items]
Total charges	$ 244	$ 74