REVENUE - Reconciliation of Gross Product Sales to Net Product Sales (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gross to Net Adjustments [Line Items]
Total Revenues	$ 46,385	$ 42,518	$ 26,145
Gross to net adjustments	(22,842)	(18,695)	(12,032)
Prior period gross to net adjustment impacted by new accounting pronouncement	319	106	132
Gross product sales
Gross to Net Adjustments [Line Items]
Total Revenues	67,897	60,016	37,206
Net product sales
Gross to Net Adjustments [Line Items]
Total Revenues	45,055	41,321	25,174
Charge-backs and cash discounts
Gross to Net Adjustments [Line Items]
Gross to net adjustments	(7,253)	(5,827)	(3,675)
Medicaid and Medicare rebates
Gross to Net Adjustments [Line Items]
Gross to net adjustments	(9,374)	(7,595)	(4,941)
Other rebates, returns, discounts and adjustments
Gross to Net Adjustments [Line Items]
Gross to net adjustments	$ (6,215)	$ (5,273)	$ (3,416)