REVENUE RECOGNITION Gross-to-Net Adjustments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Gross to Net Adjustments [Line Items]
Revenues	$ 5,920	$ 5,193
Gross to Net Adjustments	(2,281)	(1,729)
Prior Period Gross to Net Adjustment Impacted by New Accounting Pronouncement	78	50
Sales Revenue, Gross [Member]
Gross to Net Adjustments [Line Items]
Revenues	7,994	6,701
Sales Revenue, Net [Member]
Gross to Net Adjustments [Line Items]
Revenues	5,713	4,972
Charge-backs and cash discounts [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(774)	(583)
Medicaid and Medicare rebates [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(800)	(557)
Other rebates, returns, discounts and adjustments [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	$ (707)	$ (589)