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Other Post-Employment Benefit Plans - Schedule of Reconciliation of Benefit Obligations, Plan Assets and Funded Status for Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in plan assets:      
Fair value of plan assets at beginning of period $ 596.1    
Fair value of plan assets at end of period 547.6 $ 596.1  
Other Post-Employment Benefits and Other Employee Benefit Plans      
Change in benefit obligations:      
Benefit obligation at beginning of period 30.4 33.3  
Interest cost 1.4 1.6 $ 0.7
Actuarial gain (1.1) (1.6)  
Benefits paid, net (2.2) (2.9)  
Benefit obligation at end of period 28.5 30.4 33.3
Change in plan assets:      
Fair value of plan assets at beginning of period 0.0 0.0  
Employer contribution 2.2 2.9  
Benefits paid, net (2.2) (2.9)  
Fair value of plan assets at end of period 0.0 0.0 $ 0.0
Net amount recognized:      
Underfunded status at end of year (28.5) (30.4)  
Accumulated benefit obligation at end of year 28.5 30.4  
Amounts recognized in the consolidated balance sheets consist of:      
Current liability (4.0) (4.6)  
Non-current liability (24.5) (25.8)  
Net amount recognized (28.5) (30.4)  
Amounts recognized in accumulated other comprehensive loss consist of:      
Net actuarial gain (6.2) (5.3)  
Net prior service credit (1.0) (1.3)  
Total $ (7.2) $ (6.6)