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Employee Benefit Plans (Net Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amounts recognized in Consolidated Balance Sheets:      
Pensions and postretirement health care benefits (noncurrent) $ (209.0) $ (253.4)  
Pension and ENPP Benefits      
Change in benefit obligation      
Benefit obligation at beginning of year 1,033.7 917.3  
Service cost 15.0 16.2 $ 15.5
Interest cost 12.6 16.5 20.7
Plan participants’ contributions 1.4 1.3  
Actuarial losses (gains) (70.7) 86.8  
Amendments (13.6) (0.3)  
Curtailment (9.7) 0.0  
Settlements (0.2) (0.3)  
Benefits paid (47.2) (44.6)  
Foreign currency exchange rate changes (16.5) 40.8  
Benefit obligation at end of year 904.8 1,033.7 917.3
Change in plan assets      
Fair value of plan assets at beginning of year 808.6 711.0  
Actual return on plan assets 27.7 76.6  
Employer contributions 36.0 32.4  
Plan participants’ contributions 1.4 1.3  
Benefits paid (47.2) (44.6)  
Settlements (0.2) (0.3)  
Foreign currency exchange rate changes (10.7) 32.2  
Fair value of plan assets at end of year 815.6 808.6 711.0
Funded status (89.2) (225.1)  
Unrecognized net actuarial losses (gains) 291.7 385.1  
Unrecognized prior service cost 7.1 20.1  
Accumulated other comprehensive loss (298.8) (405.2)  
Net amount recognized (89.2) (225.1)  
Amounts recognized in Consolidated Balance Sheets:      
Other long-term asset 109.4 13.2  
Other current liabilities (7.1) (6.7)  
Accrued expenses (3.6) (3.2)  
Pensions and postretirement health care benefits (noncurrent) (187.9) (228.4)  
Postretirement Benefits      
Change in benefit obligation      
Benefit obligation at beginning of year 26.4 29.4  
Service cost 0.1 0.1 0.1
Interest cost 0.9 1.2 1.3
Plan participants’ contributions 0.0 0.0  
Actuarial losses (gains) (3.7) (1.1)  
Amendments 0.4 0.0  
Curtailment 0.0 0.0  
Settlements 0.0 0.0  
Benefits paid (1.3) (1.5)  
Foreign currency exchange rate changes (0.2) (1.7)  
Benefit obligation at end of year 22.6 26.4 29.4
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 1.3 1.5  
Plan participants’ contributions 0.0 0.0  
Benefits paid (1.3) (1.5)  
Settlements 0.0 0.0  
Foreign currency exchange rate changes 0.0 0.0  
Fair value of plan assets at end of year 0.0 0.0 $ 0.0
Funded status (22.6) (26.4)  
Unrecognized net actuarial losses (gains) (1.1) 2.6  
Unrecognized prior service cost 3.2 2.9  
Accumulated other comprehensive loss (2.1) (5.5)  
Net amount recognized (22.6) (26.4)  
Amounts recognized in Consolidated Balance Sheets:      
Other long-term asset 0.0 0.0  
Other current liabilities (1.5) (1.4)  
Accrued expenses 0.0 0.0  
Pensions and postretirement health care benefits (noncurrent) $ (21.1) $ (25.0)