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Organization and Basis of Presentation (Details)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Employees
Facilities
Countries
Dec. 31, 2020
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Entity Number of Employees | Employees   20,000  
Number of Facilities | Facilities   80  
Number of Countries in which Entity Operates | Countries   17  
Finance Lease, Right-of-Use Asset, before Accumulated Amortization $ 49.0    
Lessee, Finance Lease, Not Yet Commenced, Right-of-Use Asset, before Accumulated Amortization   $ 40.0  
Deferred payments of social security tax   15.2  
CARES Act [Member]      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Refundable payroll tax credit   6.3  
CARES Act [Member]      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Proceeds from Income Tax Refunds 6.0    
Loss carryback related to the CARES Act      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Other Tax Expense (Benefit)   (5.2) $ (14.4)
GERMANY      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Finance Lease, Liability $ 49.0    
UNITED STATES      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Lessee, Finance Lease, Not Yet Commenced, Lease Liability   $ 40.0