REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total Revenues	$ 11,201	$ 11,865
Collaborative Arrangement
Disaggregation of Revenue [Line Items]
Total Revenues	3,723	3,896
Net product sales
Disaggregation of Revenue [Line Items]
Total Revenues	10,886	11,559
Net product sales | Collaborative Arrangement
Disaggregation of Revenue [Line Items]
Total Revenues	3,635	3,762
Alliance revenues | Collaborative Arrangement
Disaggregation of Revenue [Line Items]
Total Revenues	88	134
Other revenues
Disaggregation of Revenue [Line Items]
Total Revenues	$ 227	$ 172