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Intangible Assets, including Goodwill (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Mar. 01, 2020
Jan. 01, 2020
Acquired Finite-Lived Intangible Assets [Line Items]      
Increase in intangible assets, net $ 8.6    
Decrease in value of intangible assets denominated in a foreign currency as a result of foreign exchange rate fluctuations 21.5    
Amortization expense for intangible assets 5.8    
Goodwill increase 12.5    
Decrease in value of goodwill denominated in a foreign currency as a result of foreign exchange rate fluctuations 8.2    
HCL      
Acquired Finite-Lived Intangible Assets [Line Items]      
Intangible assets recorded in connection with acquisition   $ 27.6  
Goodwill recorded in connection with acquisition 19.1    
MEPC      
Acquired Finite-Lived Intangible Assets [Line Items]      
Intangible assets recorded in connection with acquisition     $ 7.3
Goodwill recorded in connection with acquisition $ 1.6