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Investments - Schedule of Investments as a Percentage of Investments of Consolidated Funds - Additional Information (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Cost of investments of Consolidated Funds $ 7,726.5 $ 7,387.9
United States | Equity securities    
Schedule of Investments [Line Items]    
Cost of total assets 543.7 397.3
United States | Partnership and LLC interests    
Schedule of Investments [Line Items]    
Cost of total assets 194.8 389.2
United States | Loans    
Schedule of Investments [Line Items]    
Cost of total assets 24.0 36.3
United States | Total assets of the CLOs    
Schedule of Investments [Line Items]    
Cost of total assets 3,943.3 3,256.0
Europe | Equity securities    
Schedule of Investments [Line Items]    
Cost of total assets 10.7 0.0
Europe | Total assets of the CLOs    
Schedule of Investments [Line Items]    
Cost of total assets 2,889.4 3,231.8
Global | Equity securities    
Schedule of Investments [Line Items]    
Cost of total assets 39.9 0.0
Global | Total assets of the CLOs    
Schedule of Investments [Line Items]    
Cost of total assets $ 80.7 $ 77.3