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Pension and Postretirement Benefit Plans (Net Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Amounts recognized in Consolidated Balance Sheets:      
Pension and postretirement health care benefits (noncurrent) $ (155.6) $ (170.5)  
Pension and ENPP Benefits      
Change in benefit obligation      
Benefit obligation at beginning of year 647.0 611.6  
Service cost 8.2 9.6 $ 12.8
Interest cost 27.8 29.3 14.8
Plan participants’ contributions 1.3 1.3  
Actuarial losses (gains) (42.3) 21.6  
Amendments (0.3) 0.1  
Settlements (34.0) (4.9)  
Benefits paid (44.4) (46.1)  
Foreign currency exchange rate changes (12.2) 24.5  
Curtailment (1.0) 0.0  
Benefit obligation at end of year 550.1 647.0 611.6
Change in plan assets      
Fair value of plan assets at beginning of year 572.0 528.7  
Actual return on plan assets (18.2) 31.2  
Employer contributions 26.9 35.1  
Plan participants’ contributions 1.3 1.3  
Benefits paid (44.4) (46.1)  
Settlements (33.9) (4.9)  
Foreign currency exchange rate changes (9.7) 26.7  
Fair value of plan assets at end of year 494.0 572.0 528.7
Funded status (56.0) (75.0)  
Amounts recognized in Consolidated Balance Sheets:      
Other assets (noncurrent) 92.9 85.0  
Other current liabilities (7.5) (7.4)  
Accrued expenses (3.7) (4.1)  
Pension and postretirement health care benefits (noncurrent) (137.7) (148.5)  
Net amount recognized (56.0) (75.0)  
Postretirement Benefits      
Change in benefit obligation      
Benefit obligation at beginning of year 23.0 21.2  
Service cost 0.0 0.1 0.1
Interest cost 1.5 1.3 0.9
Plan participants’ contributions 0.0 0.0  
Actuarial losses (gains) (3.1) 1.7  
Amendments 1.6 0.0  
Settlements 0.0 0.0  
Benefits paid (1.9) (1.8)  
Foreign currency exchange rate changes (1.4) 0.5  
Curtailment 0.0 0.0  
Benefit obligation at end of year 19.7 23.0 21.2
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 1.8 1.8  
Plan participants’ contributions 0.0 0.0  
Benefits paid (1.9) (1.8)  
Settlements 0.0 0.0  
Foreign currency exchange rate changes 0.1 0.0  
Fair value of plan assets at end of year 0.0 0.0 $ 0.0
Funded status (19.7) (23.0)  
Amounts recognized in Consolidated Balance Sheets:      
Other assets (noncurrent) 0.0 0.0  
Other current liabilities (1.6) (1.6)  
Accrued expenses 0.0 0.0  
Pension and postretirement health care benefits (noncurrent) (18.1) (21.4)  
Net amount recognized $ (19.7) $ (23.0)