REVENUE - Reconciliation of Gross Product Sales to Net Product Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Gross to Net Adjustments [Line Items]
Total Revenues	$ 11,201	$ 11,865
Total GTN adjustments	(8,988)	(7,736)
Prior period gross to net adjustment impacted by new accounting pronouncement	289	80
United States
Gross to Net Adjustments [Line Items]
Total Revenues	7,873	8,476
Total GTN adjustments	(8,200)	(6,900)
Gross product sales
Gross to Net Adjustments [Line Items]
Total Revenues	19,874	19,295
Net product sales
Gross to Net Adjustments [Line Items]
Total Revenues	10,886	11,559
Charge-backs and cash discounts
Gross to Net Adjustments [Line Items]
Total GTN adjustments	(2,958)	(2,556)
Medicaid and Medicare rebates
Gross to Net Adjustments [Line Items]
Total GTN adjustments	(3,840)	(3,084)
Other rebates, returns, discounts and adjustments
Gross to Net Adjustments [Line Items]
Total GTN adjustments	$ (2,190)	$ (2,096)