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Pension and Other Post-retirement Benefits Changes in Benefit Obligations and Plan Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Projected benefit obligation:      
BALANCE at the beginning of the period $ 617.5 $ 623.1  
Interest cost 29.8 31.2 $ 22.4
Actuarial loss (gain) (22.8) 5.7  
Benefits paid (43.0) (42.5)  
Defined Benefit Plan, Accumulated Benefit Obligation 581.5 617.5  
BALANCE at the end of the period 581.5 617.5 623.1
Plan assets      
Fair value, at the beginning of the period 471.2 458.5  
Actual return 20.2 48.5  
Employer contributions 20.9 5.9  
Foreign currency adjustments 42.4 41.7  
Fair value, at the end of the period 469.9 471.2 458.5
Accumulated contributions less than net periodic benefit cost (148.0) (171.8)  
Amounts recognized in Consolidated Balance Sheet:      
Accrued liabilities (5.1) (4.7)  
Other liabilities (long-term) (106.5) (141.6)  
Net benefit liabilities (111.6) (146.3)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]      
Actuarial gain 36.6 25.7  
Prior service cost (0.2) (0.2)  
Total accumulated other comprehensive income $ 36.4 $ 25.5  
Weighted-average assumptions:      
Cash balance interest credit rate 3.26% 3.26%  
Pension Plan [Member]      
Projected benefit obligation:      
BALANCE at the beginning of the period $ 606.5 $ 611.5  
Interest cost 29.3 30.6  
Actuarial loss (gain) (22.1) 6.1  
Benefits paid (42.4) (41.7)  
BALANCE at the end of the period 571.3 606.5 611.5
Plan assets      
Fair value, at the beginning of the period 471.2 458.5  
Actual return 20.2 48.5  
Employer contributions 20.9 5.9  
Foreign currency adjustments 42.4 41.7  
Fair value, at the end of the period 469.9 471.2 458.5
Accumulated contributions less than net periodic benefit cost (129.5) (152.9)  
Amounts recognized in Consolidated Balance Sheet:      
Accrued liabilities (4.1) (3.6)  
Other liabilities (long-term) (97.3) (131.7)  
Net benefit liabilities (101.4) (135.3)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]      
Actuarial gain 28.3 17.8  
Prior service cost (0.2) (0.2)  
Total accumulated other comprehensive income $ 28.1 $ 17.6  
Weighted-average assumptions:      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.54% 4.97%  
Other Postretirement Benefits Plans And Supplemental Employee Retirement Plans [Member]      
Projected benefit obligation:      
BALANCE at the beginning of the period $ 11.0 $ 11.6  
Interest cost 0.5 0.6  
Actuarial loss (gain) (0.7) (0.4)  
Benefits paid (0.6) (0.8)  
BALANCE at the end of the period 10.2 11.0 11.6
Plan assets      
Fair value, at the beginning of the period 0.0 0.0  
Actual return 0.0 0.0  
Employer contributions 0.0 0.0  
Foreign currency adjustments 0.0 0.0  
Fair value, at the end of the period 0.0 0.0 $ 0.0
Accumulated contributions less than net periodic benefit cost (18.5) (18.9)  
Amounts recognized in Consolidated Balance Sheet:      
Accrued liabilities (1.0) (1.1)  
Other liabilities (long-term) (9.2) (9.9)  
Net benefit liabilities (10.2) (11.0)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]      
Actuarial gain 8.3 7.9  
Prior service cost 0.0 0.0  
Total accumulated other comprehensive income $ 8.3 $ 7.9  
Weighted-average assumptions:      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.52% 5.00%