v3.25.4
Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance $ 690.5 $ 731.6 $ 686.5
Other comprehensive income before reclassifications, before income tax 1.6 (1.2)  
Amounts reclassified from accumulated other comprehensive income (loss), before income tax (3.6) (3.6)  
Tax effect (0.3) 0.1 (0.2)
Other comprehensive income (loss), net of tax (2.3) (4.7) (2.3)
Ending balance 686.0 690.5 731.6
Foreign Currency Translation Adjustments      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (7.7) (6.5)  
Other comprehensive income before reclassifications, before income tax 1.6 (1.2)  
Amounts reclassified from accumulated other comprehensive income (loss), before income tax 0.0 0.0  
Tax effect 0.0 0.0  
Other comprehensive income (loss), net of tax 1.6 (1.2)  
Ending balance (6.1) (7.7) (6.5)
Pension and Postretirement Liability Adjustments      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance 15.4 18.9  
Other comprehensive income before reclassifications, before income tax 0.0 0.0  
Amounts reclassified from accumulated other comprehensive income (loss), before income tax (3.6) (3.6)  
Tax effect (0.3) 0.1  
Other comprehensive income (loss), net of tax (3.9) (3.5)  
Ending balance 11.5 15.4 18.9
Accumulated Other Comprehensive Income (Loss)      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance 7.7 12.4 14.7
Other comprehensive income (loss), net of tax (2.3) (4.7) (2.3)
Ending balance $ 5.4 $ 7.7 $ 12.4