REVENUE RECOGNITION Gross-to-Net Adjustments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Gross to Net Adjustments [Line Items]
Revenues	$ 10,781	$ 5,920
Gross to Net Adjustments	(4,145)	(2,281)
Prior Period Gross to Net Adjustment Impacted by New Accounting Pronouncement	72	78
Sales Revenue, Gross [Member]
Gross to Net Adjustments [Line Items]
Revenues	14,686	7,994
Net product sales [Member]
Gross to Net Adjustments [Line Items]
Revenues	10,541	5,713
Charge-backs and cash discounts [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(1,340)	(774)
Medicaid and Medicare rebates [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(1,498)	(800)
Other rebates, returns, discounts and adjustments [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	$ (1,307)	$ (707)