REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 10,966	$ 11,218	$ 33,529	$ 34,753
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	10,645	10,813	32,610	33,606
Alliance revenues
Disaggregation of Revenue [Line Items]
Total revenues	138	173	461	560
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 183	$ 232	$ 458	$ 587