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Investments - Investments of Consolidated Funds (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]    
Investments measured at net asset value   $ 7,165.5
Minimum percent of aggregate assets for individual investments with fair value 5.00%  
Consolidated VIEs | Equity securities    
Schedule of Investments [Line Items]    
Investments measured at net asset value $ 453.4