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Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Results of Operations from Oil and Gas Producing Activities (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of results of operations from oil and gas producing activities [line items]      
Pre-tax income (loss) from producing activities $ 1,181 $ (257) $ 3,056
Income tax expense / benefit 1,212 (1,020) (822)
Argentina [member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Net sales to unaffiliated parties 50 33 51
Net intersegment sales 8,225 7,211 7,134
Total net revenues 8,275 7,244 7,185
Production costs (4,715) (4,148) (3,712)
Exploration expenses (238) (60) (63)
Depreciation of property, plant and equipment; intangible and right-of-use assets (1,963) (2,567) (2,075)
Impairment of property, plant and equipment and inventories write-down (79) (2,288) (123)
Other (956) (179) 82
Pre-tax income (loss) from producing activities 324 (1,998) 1,294
Income tax expense / benefit (113) 699 (453)
Results of oil and gas producing activities 211 (1,299) 841
Other foreign [Member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Production costs   0 (1)
Exploration expenses (1) (1) (2)
Other   0 1
Pre-tax income (loss) from producing activities (1) (1) (2)
Results of oil and gas producing activities (1) (1) (2)
Worldwide [member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Net sales to unaffiliated parties 50 33 51
Net intersegment sales 8,225 7,211 7,134
Total net revenues 8,275 7,244 7,185
Production costs (4,715) (4,148) (3,713)
Exploration expenses (239) (61) (65)
Depreciation of property, plant and equipment; intangible and right-of-use assets (1,963) (2,567) (2,075)
Impairment of property, plant and equipment and inventories write-down (79) (2,288) (123)
Other (956) (179) 83
Pre-tax income (loss) from producing activities 323 (1,999) 1,292
Income tax expense / benefit (113) 699 (453)
Results of oil and gas producing activities $ 210 $ (1,300) $ 839