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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Oct. 31, 2021
Accounting Policies [Abstract]            
Accrued performance allocations and incentive fee related compensation $ 4,087.8 $ 3,784.5   $ 3,784.5    
Realized performance allocation related compensation percentage (percent)           20.00%
Maximum lag period for which the partnership investments in funds are valued 90 days     90 days    
Securities transferred to counterparties under repurchase agreements   243.9   $ 243.9    
Foreign currency transaction gain (loss)   $ 15.9 $ (9.9) $ 39.1 $ (11.8)