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Retirement Plans (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
plan
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Contributory defined benefit pension plans | plan 5    
United States Retirement Plans of US Entity, Defined Contribution [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan, cost recognized $ 14.6 $ 37.1 $ 28.8
Foreign Retirement Plans, Defined Contribution [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan, cost recognized 37.9 35.2 $ 30.7
Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligations, benefit obligation, end of year 486.6 421.6  
Defined Benefit Plan, Plan Assets, Amount 497.7 432.3  
Defined Benefit Plan, Funded (Unfunded) Status of Plan 11.1 10.7  
Change in plan assets:      
Defined Benefit Plan, Accumulated Benefit Obligation 486.2 421.2  
Foreign Plan [Member]      
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]      
Assets for Plan Benefits, Defined Benefit Plan 26.2 23.2  
Pension liabilities (included in Other liabilities) (15.1) (12.5)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax $ 116.2 $ 103.8