FINANCIAL INSTRUMENTS - Other Comprehensive Income (Loss) (Details) - Net Investment Hedging - Other comprehensive income (loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Foreign currency
Derivative Instruments, Gain (Loss)
Gains and (losses) on derivative instruments	$ 1	$ 0	$ (6)	$ 1
Cross-currency swaps
Derivative Instruments, Gain (Loss)
Gains and (losses) on derivative instruments	3	(17)	47	18
Foreign currency-denominated debt
Derivative Instruments, Gain (Loss)
Gains and (losses) on derivative instruments	$ 12	$ (10)	$ 37	$ (2)