v3.25.2
Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance $ 686.1 $ 690.5 $ 739.3 $ 731.6 $ 690.5 $ 731.6
Other comprehensive income (loss) before reclassifications, before income tax         1.6 (0.5)
Amounts reclassified from accumulated other comprehensive income (loss), before income tax         (2.4) (2.3)
Amounts deferred to accumulated other comprehensive income (loss),before income tax         0.0 0.0
Tax effect (0.2)   0.0   (0.3) 0.0
Other comprehensive income (loss), net of tax (0.2) (0.9) (1.7) (1.1) (1.1) (2.8)
Ending balance 690.0 686.1 736.3 739.3 690.0 736.3
Foreign Currency Translation Adjustments            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance   (7.7)   (6.5) (7.7) (6.5)
Other comprehensive income (loss) before reclassifications, before income tax         1.6 (0.5)
Amounts reclassified from accumulated other comprehensive income (loss), before income tax         0.0 0.0
Amounts deferred to accumulated other comprehensive income (loss),before income tax         0.0  
Tax effect         0.0 0.0
Other comprehensive income (loss), net of tax         1.6 (0.5)
Ending balance (6.1)   (7.0)   (6.1) (7.0)
Pension and Postretirement Liability Adjustments            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance   15.4   18.9 15.4 18.9
Other comprehensive income (loss) before reclassifications, before income tax         0.0 0.0
Amounts reclassified from accumulated other comprehensive income (loss), before income tax         (2.4) (2.3)
Amounts deferred to accumulated other comprehensive income (loss),before income tax         0.0 0.0
Tax effect         (0.3) 0.0
Other comprehensive income (loss), net of tax         (2.7) (2.3)
Ending balance 12.7   16.6   12.7 16.6
Accumulated Other Comprehensive Income (Loss)            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance 6.8 7.7 11.3 12.4 7.7 12.4
Other comprehensive income (loss), net of tax (0.2) (0.9) (1.7) (1.1)    
Ending balance $ 6.6 $ 6.8 $ 9.6 $ 11.3 $ 6.6 $ 9.6