Business Segment Information - Summary of Business Segment Information (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of operating segments [abstract] | |||
| Unproductive exploratory drillings | $ (32) | $ (133) | $ (21) |