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DIVESTITURES AND ACQUISITIONS - Elk Hills Transaction (Details) a in Thousands, $ in Millions	1 Months Ended
	Apr. 30, 2018 USD ($) a	Dec. 31, 2020 USD ($)
ACQUISITIONS AND DIVESTITURES
Purchase price	$ 518
Working, surface and mineral interests in the formerly Elk Hills field
ACQUISITIONS AND DIVESTITURES
Working, surface and mineral interests acquired | a	47
Business Combination, Consideration Transferred, Liabilities Incurred	$ 7
Other oil and gas property
ACQUISITIONS AND DIVESTITURES
Remaining commitments to invest an oil and gas property		$ 12

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