Pension and Other Postretirement Benefit Costs - Narrative (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract] | ||
| Defined benefit pension plan cash contributions | $ 6.5 | $ 5.5 |
| Employer contributions | $ 7.2 | $ 6.9 |