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Revenue Recognition (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]    
Accounts receivable allowance $ 16.6 $ 17.1
Deferred revenue 6.9 4.2
Revenue recognized 3.1  
Customer cash held in company bank accounts $ 19.4 $ 21.9
Minimum    
Disaggregation of Revenue [Line Items]    
Term, contracts with customers 1 year  
Amortization period 1 year  
Maximum    
Disaggregation of Revenue [Line Items]    
Term, contracts with customers 3 years