v3.26.3
Shareholders' Equity - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss $ 2,140.6 $ 2,106.4 $ 2,065.5 $ 2,060.3 $ 2,011.4 $ 1,995.2 $ 2,104.9 $ 2,126.9
Gain on interest rate swap, net of income taxes of $0.2 on both dates                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss 0.2     0.5        
Defined benefit pension plans, net of income tax benefit of $(20.6) on both dates                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss 23.6     24.0        
Retiree health care plan, net of income taxes of $ 2.0 and $2.1, respectively                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss 0.1     0.6        
Foreign currency translation                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss (312.9)     (249.7)        
Translation loss on long-term intercompany loans, net of income taxes of $19.2 and $19.1, respectively                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss (133.6)     (133.6)        
(Loss) gain on derivative instruments, net of income tax benefit of $(44.9) and $(0.7), respectively                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss 16.5     (53.9)        
Accumulated other comprehensive loss                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive loss $ (406.1) $ (399.1) $ (412.1) $ (412.1) $ (457.1) $ (450.9) $ (447.1) $ (443.0)