Pension and Postretirement Benefit Plans and Defined Contribution Plans - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Retirement Benefits [Abstract] | |||
| Defined contribution plan, cost recognized | $ 854 | $ 800 | $ 843 |