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, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Future Net Cash Flow [Abstract] | |||
| Beginning of year | $ 6,263 | $ 4,507 | $ 7,102 |
| Sales and transfers, net of production costs | (2,701) | (515) | (1,819) |
| Net change in sales and transfer prices, net of future production costs | (8,192) | (2,672) | (1,624) |
| Changes in reserves and production rates (timing) | (3,627) | (1,761) | (1,390) |
| Net changes for extensions, discoveries and improved recovery | 16,313 | 7,922 | 2,782 |
| Changes in estimated future development and abandonment costs | (3,385) | (1,738) | (3,734) |
| Development costs incurred during the year that reduced future development costs | 1,936 | 1,777 | 1,996 |
| Accretion of discount | 546 | 525 | 984 |
| Net change in income taxes | 2,107 | (1,783) | 211 |
| Others | 0 | 1 | (1) |
| End of year | $ 9,260 | $ 6,263 | $ 4,507 |