REVENUE RECOGNITION Gross-to-Net Adjustments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Gross to Net Adjustments [Line Items]
Total Revenues	$ 11,073	$ 10,781
Gross to Net Adjustments	(4,761)	(4,145)
Prior Period Gross to Net Adjustment Impacted by New Accounting Pronouncement	217	72
Sales Revenue, Gross [Member]
Gross to Net Adjustments [Line Items]
Total Revenues	15,559	14,686
Net product sales [Member]
Gross to Net Adjustments [Line Items]
Total Revenues	10,798	10,541
Charge-backs and cash discounts [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(1,586)	(1,340)
Medicaid and Medicare rebates [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	(1,718)	(1,498)
Other rebates, returns, discounts and adjustments [Member]
Gross to Net Adjustments [Line Items]
Gross to Net Adjustments	$ (1,457)	$ (1,307)