Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Summary of Capitalized Costs, Along with the related Accumulated Depreciation and Allowances (Parenthetical) (Detail) - IFRS 16 [member] - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Disclosure of information about consolidated entities [line items] | |||
| Upstream wells related equipment contracts comprised in right-of-use assets | $ 808 | $ 740 | $ 696 |
| Upstream Contracts comprised in right-of-use assets [member] | |||
| Disclosure of information about consolidated entities [line items] | |||
| Upstream support equipment and facilities contracts comprised in right-of-use assets | 569 | 602 | 521 |
| Accumulated depreciation of all Upstream contracts comprised in right-of-use assets | $ (1,109) | $ (895) | $ (762) |