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Summary of Significant Accounting Policies (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
segment
Sep. 30, 2019
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Number of reportable segments | segment     3  
Advertising Expense $ 7.7 $ 13.6 $ 28.9 $ 41.4
Capitalized internal-use software development costs $ 8.8 $ 11.4 $ 31.7 $ 24.3
Minimum        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets, useful life     2 years  
Maximum        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets, useful life     5 years