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Related Party Transactions - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
May 05, 2020
Jan. 01, 2020
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]              
Maximum percentage of interest on amounts due from affiliates (percent)         7.02%    
Tax receivable agreement termination, cash payments per partnership unit exchanged (in dollars per share)   $ 1.50          
Tax receivable agreement termination, term of annual installments   5 years          
Tax receivable agreement termination, annual cash payments per partnership unit exchanged (in dollars per share)   $ 0.30          
Conversion of units, deferred consideration obligation, discount   $ 11.3          
Percentage of estimated realizable tax benefit to be paid by corporate taxpayers on exchange transactions         85.00%    
Payment of aircraft related expenses     $ 0.4 $ 0.5 $ 0.9 $ 1.2  
Fair value of assets     7,098.7   7,098.7   $ 7,003.8
Level III              
Related Party Transaction [Line Items]              
Fair value of assets     6,691.6   6,691.6   6,955.3
Level III | BDC preferred shares | Market Yield Analysis              
Related Party Transaction [Line Items]              
Fair value of assets     61.2   61.2   72.5
Affiliated Entity              
Related Party Transaction [Line Items]              
Interest-bearing loans     $ 22.3   $ 22.3   $ 18.2
Floor rate     3.50%   3.50%    
Actual rate     0.0525   0.0525    
Affiliated Entity | WSJ Prime Rate              
Related Party Transaction [Line Items]              
Accrued interest percentage     1.00%   1.00%    
Carlyle Secured Lending, Inc. | Affiliated Entity              
Related Party Transaction [Line Items]              
Purchase of investment (in shares) 2,000,000            
Purchase of investment (in dollars per share) $ 25            
Dividend rate, percentage 7.00%            
Dividend rate, payable in shares, percentage 9.00%            
Initial conversion price (in usd per share) $ 9.50            
Interest income     $ 0.9 $ 0.9 $ 2.6 $ 2.6