Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves (Details)

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SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Extractive Industries [Abstract]      
Sales and transfers of oil and gas produced, net of production costs $ (1,035) $ (264) $ (734)
Net changes in prices, production costs, and development costs 2,596 (954) (1,372)
Acquisition of oil and gas reserves in place 0 0 0
Extensions and discoveries 639 38 388
Previously estimated development costs incurred during the period 149 215 406
Revisions of previous quantity estimates, less related production costs 858 (255) (321)
Sales of oil and gas reserves in place (1) (6) (49)
Accretion of discount 54 170 298
Net changes in income taxes (178) 0 425
Change in production rates and other 516 (109) (319)
Total change in standardized measure of discounted future net cash flows $ 3,598 $ (1,165) $ (1,278)