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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, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of results of operations from oil and gas producing activities [line items]      
Pre-tax income (loss) from producing activities $ (257) $ 3,056 $ 715
Income tax expense / benefit (1,020) (822) (699)
Argentina [member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Net sales to unaffiliated parties 33 51 49
Net intersegment sales 7,211 7,134 5,820
Total net revenues 7,244 7,185 5,869
Production costs (4,148) (3,712) (2,921)
Exploration expenses (60) (63) (27)
Depreciation of property, plant and equipment; intangible and right-of-use assets (2,567) (2,075) (2,378)
Impairment of Property, plant and equipment (2,288) (123) (115)
Other (179) 82 (306)
Pre-tax income (loss) from producing activities (1,998) 1,294 122
Income tax expense / benefit 699 (453) (43)
Results of oil and gas producing activities (1,299) 841 79
Other foreign [Member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Production costs   (1) (2)
Exploration expenses (1) (2) (2)
Other   1 9
Pre-tax income (loss) from producing activities (1) (2) 5
Results of oil and gas producing activities (1) (2) 5
Worldwide [member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Net sales to unaffiliated parties 33 51 49
Net intersegment sales 7,211 7,134 5,820
Total net revenues 7,244 7,185 5,869
Production costs (4,148) (3,713) (2,923)
Exploration expenses (61) (65) (29)
Depreciation of property, plant and equipment; intangible and right-of-use assets (2,567) (2,075) (2,378)
Impairment of Property, plant and equipment (2,288) (123) (115)
Other (179) 83 (297)
Pre-tax income (loss) from producing activities (1,999) 1,292 127
Income tax expense / benefit 699 (453) (43)
Results of oil and gas producing activities $ (1,300) $ 839 $ 84