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Investments - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]      
Distributed carried interest subject to clawback $ 75.6    
Bank syndicated loans     $ 232.7
Secured Debt      
Schedule of Equity Method Investments [Line Items]      
Warehoused loans     $ 172.5
Current And Former Employees      
Schedule of Equity Method Investments [Line Items]      
Distributed carried interest subject to clawback 59.2    
Principal investments      
Schedule of Equity Method Investments [Line Items]      
Equity method investments 598.5 $ 410.5  
Other equity investment      
Schedule of Equity Method Investments [Line Items]      
Equity method investments $ 101.3 $ 115.0