Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Changes in 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 - supplementary information on oil and gas exploration and production activities [Abstract] | |||
| Sales of oil and gas produced, net of production costs | $ (38,587) | $ (34,933) | $ (41,751) |
| Net changes in prices and production costs | (24,622) | 37,159 | (96,667) |
| Extensions and discoveries | 279 | 921 | 540 |
| Development cost incurred during the year | 5,229 | 6,011 | 8,657 |
| Changes in estimated development costs | (6,704) | (7,629) | (6,012) |
| Reserves revisions and timing changes | 12,147 | 13,860 | 16,737 |
| Accretion of discount of pre-tax net cash flows | 10,622 | 7,192 | 18,679 |
| Net changes in production and excess gains taxes | 24,284 | 3,691 | 64,747 |
| Aggregate change in standardized measure of discounted future net cash flows | (17,352) | 26,272 | (35,070) |
| As of January 1 | 54,124 | 27,852 | 62,922 |
| As of December 31 | 36,772 | 54,124 | 27,852 |
| Change | $ (17,352) | $ 26,272 | $ (35,070) |