EQUITY-BASED COMPENSATION - Schedule of Stock-Based Compensation Plans and Related Costs (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation capitalized pursuant to full cost method of accounting for oil and natural gas properties	$ 17	$ 10	$ 9
General and administrative expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
General and administrative expenses	$ 48	$ 27	$ 25
Equity Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Common stock reserved for future issuance (in shares)	1,313,588

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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