REVENUE - Reconciliation of Gross Product Sales to Net Product Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Gross to Net Adjustments [Line Items]
Total revenues	$ 11,226	$ 11,887	$ 22,563	$ 23,535
Total GTN adjustments	(7,194)	(5,814)	(13,434)	(11,156)
Prior period gross to net adjustment impacted by new accounting pronouncement	11	123	98	197
Net product sales
Gross to Net Adjustments [Line Items]
Total revenues	10,917	11,485	21,965	22,793
Gross product sales
Gross to Net Adjustments [Line Items]
Total revenues	18,111	17,299	35,399	33,949
Charge-backs and cash discounts
Gross to Net Adjustments [Line Items]
Total GTN adjustments	(2,279)	(1,750)	(4,370)	(3,513)
Medicaid and Medicare rebates
Gross to Net Adjustments [Line Items]
Total GTN adjustments	(3,143)	(2,624)	(5,625)	(4,708)
Other rebates, returns, discounts and adjustments
Gross to Net Adjustments [Line Items]
Total GTN adjustments	$ (1,772)	$ (1,440)	$ (3,439)	$ (2,935)