Employee Benefits - Recorded Severance Liability (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Movements in Severance Benefits [Roll Forward] | |||
| Beginning of Year | $ 1,095 | $ 567 | $ 653 |
| Charged to Expense | 1,491 | 1,494 | 531 |
| Payments | (906) | (966) | (617) |
| End of Year | $ 1,680 | $ 1,095 | $ 567 |