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DEBT - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 05, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (19)		$ (27)
Unamortized discount costs	(31)		0
Unamortized premium costs	9		10
Total long-term debt	5,371		4,464
4.625% Notes due 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 399		400
Stated interest rate	4.625%
7.320% Medium-term Notes, Series A, due 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 21		20
Stated interest rate	7.32%
2.875% Senior Notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,000		0
Stated interest rate	2.875%	2.875%
4.750% Senior Notes due 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 0		1,250
Stated interest rate	4.75%
5.375% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross	$ 800		800
Stated interest rate	5.375%
3.250% Senior Notes due 2026
Debt Instrument [Line Items]
Long-term debt, gross	$ 800		0
Stated interest rate	3.25%	3.25%
7.350% Medium-term Notes, Series A, due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 11		10
Stated interest rate	7.35%
7.125% Medium-term Notes, Series B, due 2028
Debt Instrument [Line Items]
Long-term debt, gross	$ 108		100
Stated interest rate	7.125%
3.500% Senior Notes due 2029
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,200		0
Stated interest rate	3.50%	3.50%
DrillCo Agreement
Debt Instrument [Line Items]
Long-term debt, gross	$ 39		0
Revolving credit facility
Debt Instrument [Line Items]
Long-term debt, gross	13		1,490
Viper revolving credit facility
Debt Instrument [Line Items]
Long-term debt, gross	97		411
Viper 5.375% Senior Notes due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 500		0
Stated interest rate	5.375%
Rattler revolving credit facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 424		$ 0