REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total Revenues	$ 45,006	$ 46,159	$ 46,385
Net product sales
Disaggregation of Revenue [Line Items]
Total Revenues	43,778	44,671	45,055
Alliance revenues
Disaggregation of Revenue [Line Items]
Total Revenues	608	742	716
Other revenues
Disaggregation of Revenue [Line Items]
Total Revenues	$ 620	$ 746	$ 614