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Pension and Other Postretirement Benefits - Components of Defined Benefit Plan (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in plan assets      
Company contributions $ 5.5 $ 2.4  
Amount recognized on the consolidated balance sheets:      
Pension asset 31.7 30.7  
Pensions      
Change in projected benefit obligation      
Projected benefit obligation at January 1 1,032.2 1,044.3  
Service cost 1.8 2.6 $ 3.6
Interest cost 48.2 50.4 29.3
Actuarial loss (gain) (45.2) 19.0  
Foreign currency exchange rate changes and other (0.4) 0.0  
Plan participants’ contributions 0.0 0.0  
Settlements (3.1) (1.0)  
Benefits paid (83.6) (83.1)  
Projected benefit obligation at December 31 949.9 1,032.2 1,044.3
Change in plan assets      
Fair value of plan assets at January 1 1,041.3 1,044.1  
Actual return on plan assets 3.6 79.2  
Foreign currency exchange rate changes 0.2 0.3  
Company contributions 4.6 1.2  
Plan participants’ contributions 0.0 0.0  
Settlements (3.1) (0.4)  
Benefits paid (83.6) (83.1)  
Fair value of plan assets at December 31 963.0 1,041.3 1,044.1
Funded Status      
Net funded status of the plan (liability) 13.1 9.1  
Amount recognized on the consolidated balance sheets:      
Pension asset 31.7 30.7  
Accrued benefit liability (18.6) (21.6)  
Total 13.1 9.1  
Pensions | Non-U.S.      
Change in plan assets      
Company contributions 0.3 0.1  
U.S. plans with assets | U.S.      
Funded Status      
Net funded status of the plan (liability) 31.7 30.7  
U.S. plans with assets | Non-U.S.      
Funded Status      
Net funded status of the plan (liability) (1.0) (1.6)  
U.S. plans without assets | U.S.      
Funded Status      
Net funded status of the plan (liability) (12.3) (14.7)  
Other Benefits      
Change in projected benefit obligation      
Projected benefit obligation at January 1 9.2 11.2  
Service cost 0.0 0.0 0.0
Interest cost 0.4 0.5 0.3
Actuarial loss (gain) (1.4) (1.4)  
Foreign currency exchange rate changes and other 0.0 0.0  
Plan participants’ contributions 0.3 0.3  
Settlements 0.0 0.0  
Benefits paid (1.3) (1.4)  
Projected benefit obligation at December 31 7.2 9.2 11.2
Change in plan assets      
Fair value of plan assets at January 1 0.0 (0.1)  
Actual return on plan assets 0.0 0.0  
Foreign currency exchange rate changes 0.0 0.0  
Company contributions 0.9 1.2  
Plan participants’ contributions 0.4 0.3  
Settlements 0.0 0.0  
Benefits paid (1.3) (1.4)  
Fair value of plan assets at December 31 0.0 0.0 $ (0.1)
Funded Status      
Net funded status of the plan (liability) (7.2) (9.2)  
Amount recognized on the consolidated balance sheets:      
Pension asset 0.0 0.0  
Accrued benefit liability (7.2) (9.2)  
Total (7.2) (9.2)  
U.S. plans with assets | U.S.      
Funded Status      
Net funded status of the plan (liability) 0.0 0.0  
U.S. plans with assets | Non-U.S.      
Funded Status      
Net funded status of the plan (liability) 0.0 0.0  
U.S. plans without assets | U.S.      
Funded Status      
Net funded status of the plan (liability) (7.2) (9.2)  
All other plans      
Funded Status      
Net funded status of the plan (liability) (5.3) (5.3)  
All other plans      
Funded Status      
Net funded status of the plan (liability) $ 0.0 $ 0.0