Benefit Plans and Other Postretirement Benefits, Defined contribution plans (Details) - UNITED STATES - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Defined contribution plans | ||
| Contributions to U.S. defined contribution plans by the Company, maximum percentage of eligible compensation | 7.00% | 7.00% |
| Matching contributions to U.S. defined contribution plans by the Company | $ 36.8 | $ 27.3 |