v3.26.1
Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (29.3) $ (34.4) $ (30.5) $ (34.5)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 1.2 0.1    
Pension Plan [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax (42.9) (47.5) (44.2) (47.8)
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 1.4 0.3    
Other Postretirement Benefits Plan [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 13.5 13.2 $ 13.7 $ 13.4
Other Postretirement Benefits Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ (0.2) $ (0.2)