SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) - Change In Standardized Measure (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward]
Beginning balance	$ 3,062	$ 5,861	$ 6,483
Discoveries and extensions, net of related future costs	800	311	1,076
Net changes in prices and production costs	9,573	(4,326)	(1,510)
Accretion of discount	551	750	813
Revisions of previous quantity estimates	467	(108)	28
Timing and other	(161)	6	(192)
Changes in estimated future development costs	(103)	0	0
Development costs incurred	497	501	469
Sales and transfers, net of production costs	(2,801)	(746)	(1,317)
Sales of reserves in place	(1)	0	(1)
Purchases of reserves in place	6,477	0	0
Net change in income taxes	(5,077)	813	12
Ending balance	$ 13,284	$ 3,062	$ 5,861