v3.26.1
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, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of results of operations from oil and gas producing activities [line items]      
Pre-tax income (loss) from producing activities $ 910 $ 1,020 [1] $ (1,658) [1]
Income tax expense / benefit (1,709) 1,373 381
Argentina [member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Net sales to unaffiliated parties 89 50 32
Net intersegment sales 7,486 8,225 7,211
Total net revenues 7,575 8,275 7,243
Production costs (3,840) (4,715) (4,148)
Exploration expenses (84) (238) (60)
Depreciation of property, plant and equipment; intangible and right-of-use assets (2,349) (1,963) (2,568)
Impairment of property, plant and equipment and inventories write-down 0 (79) (2,288)
Other (959) (956) (177)
Pre-tax income (loss) from producing activities 343 324 (1,998)
Income tax expense / benefit (120) (113) 699
Results of oil and gas producing activities 223 211 (1,299)
Other foreign [Member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Production costs   0 0
Exploration expenses (32) (1) (1)
Other   0 0
Pre-tax income (loss) from producing activities (32) (1) (1)
Income tax expense / benefit 0    
Results of oil and gas producing activities (32) (1) (1)
Worldwide [member]      
Disclosure of results of operations from oil and gas producing activities [line items]      
Net sales to unaffiliated parties 89 50 32
Net intersegment sales 7,486 8,225 7,211
Total net revenues 7,575 8,275 7,243
Production costs (3,840) (4,715) (4,148)
Exploration expenses (116) (239) (61)
Depreciation of property, plant and equipment; intangible and right-of-use assets (2,349) (1,963) (2,568)
Impairment of property, plant and equipment and inventories write-down 0 (79) (2,288)
Other (959) (956) (177)
Pre-tax income (loss) from producing activities 311 323 (1,999)
Income tax expense / benefit (120) (113) 699
Results of oil and gas producing activities $ 191 $ 210 $ (1,300)
[1] See Note 2.d).