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Summary of Significant Accounting Policies - Schedule of Allowance for Doubtful Accounts (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning Balance $ 71.9  
Amounts accrued 15.7 $ 1.6
Write-offs charged against the allowance (11.7)  
Ending Balance 84.8  
Cumulative Effect, Period Of Adoption, Adjustment    
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning Balance $ 8.9