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Payables Pursuant to the TRAs (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
taxReceivableAgreement
Dec. 31, 2018
USD ($)
Jul. 31, 2020
USD ($)
taxReceivableAgreement
Related Party Transaction [Line Items]          
Number of TRAs | taxReceivableAgreement     5    
Number of TRAs settled | taxReceivableAgreement         4
Payments for the settlement of tax receivable agreements $ 849.8 $ 849.8 $ 0.0 $ 0.0  
Reorganization Parties and Continuing LLC Owners          
Related Party Transaction [Line Items]          
Percent of tax benefits owed under tax receivable agreement     85.00%    
TRA settlement amount         $ 850.0
Net charge from the settlement of TRAs 674.7        
TRA liability     $ 175.3    
Deferred tax assets resulting from TRA settlement $ 180.0 $ 180.0