Financial Instruments and Risk Management (Fuel Option Contracts Rollforward) (Details) - Commodity price risk - Fair value hedges - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of detailed information about hedged items [line items] | ||
| Change in value on currency instruments | $ 0.0 | $ (0.1) |
| Fuel Contracts | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Balance, beginning of the period | (0.2) | (0.1) |
| Deferred income tax related to hedging instrument | 0.0 | (0.1) |
| Balance, end of period | (0.2) | (0.2) |
| Change in value on currency instruments | $ 0.0 | $ 0.1 |