REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total Revenues	$ 12,222	$ 11,892	$ 35,692	$ 35,958
Net product sales
Disaggregation of Revenue [Line Items]
Total Revenues	11,850	11,483	34,645	34,967
Alliance revenues
Disaggregation of Revenue [Line Items]
Total Revenues	125	105	332	355
Other revenues
Disaggregation of Revenue [Line Items]
Total Revenues	$ 247	$ 304	$ 715	$ 636