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Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Summary of Changes in the Standardized Measure of Discounted Future Net Cash Flows (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Future Net Cash Flow [Abstract]      
Beginning of year $ 7,102 $ 9,055 $ 2,133
Sales and transfers, net of production costs (1,819) (3,173) (850)
Net change in sales and transfer prices, net of future production costs (1,624) (2,862) 3,396
Changes in reserves and production rates (timing) (1,390) (574) 5,013
Net changes for extensions, discoveries and improved recovery 2,782 4,722 3,329
Changes in estimated future development and abandonment costs (3,734) (3,481) (1,946)
Development costs incurred during the year that reduced future development costs 1,996 1,439 990
Accretion of discount 984 806 241
Net change in income taxes 211 1,148 (3,255)
Others (1) 22 4
End of year $ 4,507 $ 7,102 $ 9,055