REVENUE GROSS TO NET ADJUSTMENTS (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gross to Net Adjustments [Line Items]
Revenues	$ 11,068	$ 10,540	$ 10,129	$ 10,781	$ 7,945	$ 6,007	$ 6,273	$ 5,920	$ 42,518	$ 26,145	$ 22,561
Gross to Net Adjustments									(18,695)	(12,032)	(8,593)
Prior Period Gross to Net Adjustment Impacted by New Accounting Pronouncement									106	132	96
Sales Revenue, Gross [Member]
Gross to Net Adjustments [Line Items]
Revenues									60,016	37,206	30,174
Net product sales [Member]
Gross to Net Adjustments [Line Items]
Revenues									41,321	25,174	21,581
Charge-backs and cash discounts [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments									(5,827)	(3,675)	(2,735)
Medicaid and Medicare rebates [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments									(7,595)	(4,941)	(3,225)
Other rebates, returns, discounts and adjustments [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments									$ (5,273)	$ (3,416)	$ (2,633)