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Investments - Schedule of Realized and Unrealized Gains (Losses) Earned from Investments of Consolidated Funds (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Investments [Abstract]        
Realized gains (losses) $ 58.5 $ (4.5) $ 33.6 $ (49.1)
Net change in unrealized gains (losses) 30.0 (20.4) 66.5 107.2
Total $ 88.5 $ (24.9) $ 100.1 $ 58.1