Supplemental Information on Oil And Gas Producing Activities (Unaudited) - Costs Incurred for Oil and Gas Producing Activities (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Argentina [member] | |||
| Disclosure of information about consolidated entities [Line Items] | |||
| Acquisition of unproved properties | $ 184 | $ 0 | |
| Acquisition of proved properties | 580 | ||
| Exploration costs | 102 | 198 | $ 156 |
| Development costs | 3,815 | 3,884 | 4,370 |
| Total costs incurred | 4,681 | 4,082 | 4,526 |
| Other foreign [Member] | |||
| Disclosure of information about consolidated entities [Line Items] | |||
| Acquisition of unproved properties | 0 | ||
| Exploration costs | 32 | 1 | 1 |
| Development costs | 0 | ||
| Total costs incurred | 32 | 1 | 1 |
| Worldwide [member] | |||
| Disclosure of information about consolidated entities [Line Items] | |||
| Acquisition of unproved properties | 184 | 0 | |
| Acquisition of proved properties | 580 | ||
| Exploration costs | 134 | 199 | 157 |
| Development costs | 3,815 | 3,884 | 4,370 |
| Total costs incurred | $ 4,713 | $ 4,083 | $ 4,527 |