DERIVATIVE FINANCIAL INSTRUMENTS - Summary of Effect of Foreign Currency Exchange Contracts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gains (losses) recognized in AOCI	$ (16)	$ (42)	$ 62	$ 24
Gains (losses) reclassified from AOCI into product sales	(23)	18	(48)	45
Gains (losses) recognized in Other income (expense), net	$ (15)	$ (21)	$ 19	$ 3