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Shareholders' Equity and Long-Term Incentive Compensation - AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Components of accumulated other comprehensive income, net of tax [Roll Forward]      
Balance at beginning of period $ 1,194.6 $ 1,079.2  
Other comprehensive income before reclassifications (28.8) 13.4  
Amounts reclassified from accumulated other comprehensive income (8.7) (9.8)  
Current-period other comprehensive loss (37.5) 3.6  
Balance at end of period 1,384.4 1,194.6  
Accum. Other Comprehensive Income      
Components of accumulated other comprehensive income, net of tax [Roll Forward]      
Balance at beginning of period 261.1 257.5  
Balance at end of period 223.6 261.1  
Foreign Currency Translation Adjustment      
Components of accumulated other comprehensive income, net of tax [Roll Forward]      
Balance at beginning of period 251.0 239.1  
Other comprehensive income before reclassifications (32.1) 11.9  
Amounts reclassified from accumulated other comprehensive income 0.0 0.0  
Current-period other comprehensive loss (32.1) 11.9  
Balance at end of period 218.9 251.0  
Net Unrealized Gains (Losses) on Qualifying Cash Flow Hedges      
Components of accumulated other comprehensive income, net of tax [Roll Forward]      
Balance at beginning of period 5.7 11.0  
Other comprehensive income before reclassifications 3.3 1.5  
Amounts reclassified from accumulated other comprehensive income (6.4) (6.8)  
Current-period other comprehensive loss (3.1) (5.3)  
Balance at end of period 2.6 5.7  
Pension and postretirement liability adjustment and other, tax (provision) benefit 0.7 1.8 $ 3.7
Pension and Postretirement Liability Adjustment      
Components of accumulated other comprehensive income, net of tax [Roll Forward]      
Balance at beginning of period 4.4 7.4  
Other comprehensive income before reclassifications 0.0 0.0  
Amounts reclassified from accumulated other comprehensive income (2.3) (3.0)  
Current-period other comprehensive loss (2.3) (3.0)  
Balance at end of period 2.1 4.4  
Pension and postretirement liability adjustment and other, tax (provision) benefit $ (1.0) $ (1.8) $ (2.7)