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Shareholders' Equity - Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance $ 472.1 $ 435.1 $ 406.1
Total other comprehensive income (loss), net of tax 7.9 (12.3) (17.8)
Ending balance 578.3 472.1 435.1
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (50.2) (37.9)  
Other comprehensive (loss) income before reclassifications 10.9 (6.6)  
Amounts reclassified from accumulated other comprehensive loss (3.0) (5.7)  
Total other comprehensive income (loss), net of tax 7.9 (12.3)  
Ending balance (42.3) (50.2) (37.9)
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (53.9) (36.0)  
Other comprehensive (loss) income before reclassifications 9.3 (17.2)  
Amounts reclassified from accumulated other comprehensive loss (1.0) (0.7)  
Total other comprehensive income (loss), net of tax 8.3 (17.9)  
Ending balance (45.6) (53.9) (36.0)
Pension and Postretirement Medical Benefits      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance 2.7 (2.1)  
Other comprehensive (loss) income before reclassifications 1.0 4.8  
Amounts reclassified from accumulated other comprehensive loss 0.0 0.0  
Total other comprehensive income (loss), net of tax 1.0 4.8  
Ending balance 3.7 2.7 (2.1)
Derivative Financial Instruments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance 1.0 0.2  
Other comprehensive (loss) income before reclassifications 0.6 5.8  
Amounts reclassified from accumulated other comprehensive loss (2.0) (5.0)  
Total other comprehensive income (loss), net of tax (1.4) 0.8  
Ending balance $ (0.4) $ 1.0 $ 0.2