Accounting For Suspended Exploratory Well Costs (Change In Capitalized Suspended Exploratory Well Costs) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward] | |||
| Balance beginning at January 1 | $ 3,600 | $ 3,559 | $ 3,512 |
| Additions pending the determination of proved reserves | 250 | 453 | 200 |
| Charged to expense | (432) | (69) | (95) |
| Reclassifications to wells, facilities and equipment based on the determination of proved reserves | (141) | (292) | (142) |
| Divestments/Other | 9 | (51) | 84 |
| Ending balance at December 31 | 3,286 | 3,600 | 3,559 |
| Ending balance attributed to equity companies included above | $ 225 | $ 225 | $ 306 |