REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 11,226	$ 11,887	$ 22,563	$ 23,535
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	10,917	11,485	21,965	22,793
Alliance revenues
Disaggregation of Revenue [Line Items]
Total revenues	179	199	323	387
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 130	$ 203	$ 275	$ 355