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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss $ 2,126.9 $ 2,234.1 $ 2,458.1 $ 2,531.7
Defined benefit pension plans, net of income tax benefit of $(20.6) and $(23.0), respectively        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss (8.9) (36.0)    
Retiree health care plan, net of income taxes of $2.1 and $2.0, respectively        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss 1.5 1.3    
Foreign currency translation        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss (342.2) (261.2)    
Translation loss on long-term intercompany loans, net of income taxes of $19.1 on both dates        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss (133.2) (133.6)    
Gain (loss) on derivative instruments, net of income tax benefit of $(0.7) and $(22.7), respectively        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss 39.0 (37.6)    
Gain on interest rate swap, net of income taxes of $0.2 and $0.3, respectively        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss 0.8 1.1    
Accumulated other comprehensive loss        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss $ (443.0) $ (466.0) $ (458.7) $ (389.4)