REVENUE RECOGNITION Gross-to-Net Adjustments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Gross to Net Adjustments [Line Items]
Revenues	$ 6,007	$ 5,691	$ 18,200	$ 16,588
Gross to Net Adjustments	(3,116)	(2,248)	(8,185)	(6,025)
Prior Period Gross to Net Adjustment Impacted by New Accounting Pronouncement	12	(7)	139	103
Sales Revenue, Gross [Member]
Gross to Net Adjustments [Line Items]
Revenues	8,884	7,681	25,697	21,891
Net product sales [Member]
Gross to Net Adjustments [Line Items]
Revenues	5,768	5,433	17,512	15,866
Charge-backs and cash discounts [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(927)	(711)	(2,591)	(1,957)
Medicaid and Medicare rebates [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(1,362)	(847)	(3,252)	(2,169)
Other rebates, returns, discounts and adjustments [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	$ (827)	$ (690)	$ (2,342)	$ (1,899)