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Employee Benefit Plans - Summary of Status Of Foreign Pension Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Change in projected benefit obligation (PBO)      
Projected benefit obligation at the beginning of the year $ 290.8 $ 292.7  
Service cost 9.4 9.6 $ 10.0
Interest cost 5.0 4.7 4.3
Net actuarial (gain) loss 25.8 (6.1)  
Benefits paid by plan assets (5.7) (5.6)  
Benefits paid by the Company (3.8) (1.7)  
Curtailments and settlements (0.2) (0.6)  
Translation and other (gain) loss 1.6 (2.2)  
Projected benefit obligation at the end of the year 322.9 290.8 292.7
Accumulated benefit obligation at the end of the year 258.8 249.2  
Change in plan assets      
Fair value of plan assets at the beginning of the year 174.9 183.4  
Actual return (loss) on plan assets 16.2 (6.1)  
Benefits paid from plan assets (5.7) (5.6)  
Employer contributions 4.6 5.0  
Settlements (0.2) (0.3)  
Translation and other gain (loss) 0.4 (1.5)  
Fair value of plan assets at the end of the year 190.2 174.9 $ 183.4
Plans with underfunded or non-funded projected benefit obligation      
Projected benefit obligation 314.7 282.6  
Fair value of plan assets 180.5 166.2  
Plans with underfunded or non-funded accumulated benefit obligation      
Accumulated benefit obligation 193.6 181.4  
Fair value of plan assets 115.2 102.1  
Amounts recognized in the balance sheet consist of      
Non-current assets 0.0 0.3  
Current liabilities (0.3) (0.2)  
Non-current liabilities (132.4) (116.0)  
Funded status $ (132.7) $ (115.9)