FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Cross-currency Swaps, Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payments or receipts in settlement of cross-currency swaps	$ 11,000,000	$ 11,000,000
Net Investment Hedging | Cross-currency swaps | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amounts				$ 1,250,000,000
Fair value cross-currency swaps liability, net	35,000,000		$ 70,000,000
Net Investment Hedging | Cross-currency swaps | Designated as Hedging Instrument | Other Noncurrent Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value cross-currency swaps liability	38,000,000		79,000,000
Net Investment Hedging | Cross-currency swaps | Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value cross-currency swaps asset	$ 3,000,000		$ 9,000,000