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ACQUISITIONS AND DIVESTITURES - Elk Hills Transaction Paragraph (Details) $ in Millions		1 Months Ended
	Apr. 01, 2018 USD ($) a	Apr. 30, 2018 USD ($)	Dec. 31, 2019 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	47,000
Purchase price	$ 518
Liabilities assumed	$ 7
Other oil and gas property
ACQUISITIONS AND DIVESTITURES
Remaining commitments to invest an oil and gas property			$ 12