Employee Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Before tax basis amount in accumulated other comprehensive loss. | ||
| Total recognized | $ 3,171 | $ 3,376 |
| Other Benefits | ||
| Before tax basis amount in accumulated other comprehensive loss. | ||
| Net actuarial (gain) loss | (266) | (401) |
| Prior service (credits) costs | (37) | (34) |
| Total recognized | (303) | (435) |
| U.S. | Pension Benefits | ||
| Before tax basis amount in accumulated other comprehensive loss. | ||
| Net actuarial (gain) loss | 2,463 | 2,796 |
| Prior service (credits) costs | 29 | 33 |
| Total recognized | 2,492 | 2,829 |
| Int’l. | Pension Benefits | ||
| Before tax basis amount in accumulated other comprehensive loss. | ||
| Net actuarial (gain) loss | 891 | 849 |
| Prior service (credits) costs | 91 | 133 |
| Total recognized | $ 982 | $ 982 |