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Investments - Realized and Unrealized Gains (Losses) Earned from Investments of Consolidated Funds (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Investments [Abstract]    
Realized gains (losses) $ (0.4) $ (21.2)
Net change in unrealized gains 7.4 103.9
Total $ 7.0 $ 82.7