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Pension and Other Retiree Benefits - Pension Benefit Obligation and Funded Status (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in plan assets      
Employer contributions $ 17.8    
Amounts recognized in the Consolidated Balance Sheets consist of:      
Pension and post-retirement benefit obligations 117.2 $ 157.6  
Pension | U.S.      
Change in projected benefit obligation (PBO)      
Projected benefit obligation at beginning of year 162.6 162.3  
Service cost 0.0 0.0 $ 0.0
Interest cost 7.7 7.9 4.9
Actuarial (gain) loss (9.1) 3.2  
Participants’ contributions 0.0 0.0  
Benefits paid (10.7) (10.8)  
Settlement 0.0 0.0  
Termination benefits [1] 0.0 0.0 0.0
Foreign exchange rate changes 0.0 0.0  
Projected benefit obligation at end of year 150.5 162.6 162.3
Change in plan assets      
Fair value of plan assets at beginning of year 145.5 140.2  
Actual return on plan assets 7.6 13.6  
Employer contributions 3.0 2.5  
Participants’ contributions 0.0 0.0  
Benefits paid (10.7) (10.8)  
Settlement 0.0 0.0  
Foreign exchange rate changes 0.0 0.0  
Fair value of plan assets at end of year 145.4 145.5 140.2
Funded status (Fair value of plan assets less PBO) (5.1) (17.1)  
Amounts recognized in the Consolidated Balance Sheets consist of:      
Other non-current assets 0.0 0.0  
Other current liabilities 0.0 0.0  
Pension and post-retirement benefit obligations 5.1 17.1  
Components of accumulated other comprehensive income (loss), net of tax:      
Unrecognized actuarial loss (gain) 84.4 90.7  
Unrecognized prior service cost 0.0 0.0  
Pension | International      
Change in projected benefit obligation (PBO)      
Projected benefit obligation at beginning of year 467.4 441.1  
Service cost 0.6 0.5 1.0
Interest cost 18.5 20.0 9.6
Actuarial (gain) loss (34.4) 14.6  
Participants’ contributions 0.1 0.1  
Benefits paid (27.7) (27.0)  
Settlement (15.1) (3.9)  
Termination benefits [1] 0.0 0.0 0.8
Foreign exchange rate changes (12.9) 22.0  
Projected benefit obligation at end of year 396.5 467.4 441.1
Change in plan assets      
Fair value of plan assets at beginning of year 324.9 306.4  
Actual return on plan assets (8.4) 18.9  
Employer contributions 14.5 14.1  
Participants’ contributions 0.1 0.1  
Benefits paid (27.7) (27.0)  
Settlement (15.1) (4.0)  
Foreign exchange rate changes (5.4) 16.4  
Fair value of plan assets at end of year 282.9 324.9 306.4
Funded status (Fair value of plan assets less PBO) (113.6) (142.5)  
Amounts recognized in the Consolidated Balance Sheets consist of:      
Other non-current assets 2.5 2.5  
Other current liabilities 7.2 7.5  
Pension and post-retirement benefit obligations 108.9 137.5  
Components of accumulated other comprehensive income (loss), net of tax:      
Unrecognized actuarial loss (gain) 121.9 139.9  
Unrecognized prior service cost 4.9 5.2  
Post-retirement      
Change in projected benefit obligation (PBO)      
Projected benefit obligation at beginning of year 3.3 3.2  
Service cost 0.0 0.0 0.0
Interest cost 0.2 0.2 0.1
Actuarial (gain) loss 0.5 0.1  
Participants’ contributions 0.0 0.0  
Benefits paid (0.3) (0.3)  
Settlement 0.0 0.0  
Termination benefits [1] 0.0 0.0 0.0
Foreign exchange rate changes (0.1) 0.1  
Projected benefit obligation at end of year 3.6 3.3 3.2
Change in plan assets      
Fair value of plan assets at beginning of year 0.0 0.0  
Actual return on plan assets 0.0 0.0  
Employer contributions 0.3 0.3  
Participants’ contributions 0.0 0.0  
Benefits paid (0.3) (0.3)  
Settlement 0.0 0.0  
Foreign exchange rate changes 0.0 0.0  
Fair value of plan assets at end of year 0.0 0.0 $ 0.0
Funded status (Fair value of plan assets less PBO) (3.6) (3.3)  
Amounts recognized in the Consolidated Balance Sheets consist of:      
Other non-current assets 0.0 0.0  
Other current liabilities 0.4 0.3  
Pension and post-retirement benefit obligations 3.2 3.0  
Components of accumulated other comprehensive income (loss), net of tax:      
Unrecognized actuarial loss (gain) (2.6) (3.6)  
Unrecognized prior service cost $ 0.0 $ 0.0  
[1] Special termination benefit of $0.8 million due to the plan wind-up of our Canadian Salaried and Hourly pension plans effective July 1, 2022.