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Investments - Investments of Consolidated Funds (Details)
$ in Millions
9 Months Ended
Sep. 30, 2025
USD ($)
collateralized_Loan_obligation
Dec. 31, 2024
USD ($)
Schedule of Investments [Line Items]    
Investments measured at net asset value   $ 8,316.4
Minimum percent of aggregate assets for individual investments with fair value 5.00%  
Consolidated VIEs    
Schedule of Investments [Line Items]    
Number of additional CLOs | collateralized_Loan_obligation 4  
Consolidated VIEs | Equity securities    
Schedule of Investments [Line Items]    
Investments measured at net asset value $ 845.3 $ 441.9