ACQUISITIONS AND DIVESTITURES - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended				9 Months Ended
	Dec. 31, 2019	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Leasehold and property acquisitions		$ 0				$ 3,000,000	$ 39,000,000
Proceeds from sale of oil and gas properties						132,000,000	590,000,000
Block 58 Offshore Suriname
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners	50.00%
Proceeds received from joint venture	$ 100,000,000
Proceeds from joint venture agreement, for reimbursement of cost incurred	$ 79,000,000
Joint venture agreement, percentage of costs incurred for reimbursement	50.00%
Proceeds expected to receive from joint venture	$ 5,000,000,000
Joint venture agreement, future consideration term, appraisal and development capital cap	$ 7,500,000,000
Joint venture agreement, percentage of consideration carried on appraisal and development capital	25.00%
Joint venture agreement, additional cash payment to receive upon achieving of first production	$ 75,000,000
Disposed of by Sale
Business Acquisition [Line Items]
Gain (loss) on sale of non-core assets						5,000,000
Permian Basin
Business Acquisition [Line Items]
Leasehold and property acquisitions				$ 5,000,000		3,000,000	39,000,000
Permian Basin | Disposed of by Sale
Business Acquisition [Line Items]
Proceeds from sale of oil and gas properties						$ 53,000,000	21,000,000
Gain (loss) on sale of non-core assets							$ 12,000,000
Oklahoma | Disposed of by Sale
Business Acquisition [Line Items]
Proceeds from sale of oil and gas properties					$ 223,000,000
Gain (loss) on sale of non-core assets			$ 19,000,000		$ 17,000,000