REVENUE RECOGNITION - Variable Consideration Provisions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reserve beginning balance	$ 1,863	$ 1,813
Current period provisions	1,256	1,300
Payments and credits	(1,227)	(1,222)
Reserve ending balance	1,892	1,891
Discounts and Allowances
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reserve beginning balance	222	190
Current period provisions	134	147
Payments and credits	(162)	(160)
Reserve ending balance	194	177
Returns
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reserve beginning balance	482	575
Current period provisions	19	34
Payments and credits	(54)	(56)
Reserve ending balance	447	553
Rebates
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reserve beginning balance	944	779
Current period provisions	581	602
Payments and credits	(599)	(457)
Reserve ending balance	926	924
Chargebacks
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reserve beginning balance	170	184
Current period provisions	471	462
Payments and credits	(359)	(483)
Reserve ending balance	282	163
Distribution Fees
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reserve beginning balance	45	85
Current period provisions	51	55
Payments and credits	(53)	(66)
Reserve ending balance	$ 43	$ 74