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Accrued Compensation and Benefits - Performance Allocations and Incentive Fee Related Compensation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Retirement Benefits [Abstract]      
Realized $ 753.1 $ 473.8 $ 1,026.4
Unrealized 608.4 629.9 (306.5)
Total $ 1,361.5 1,103.7 $ 719.9
One time charge to incremental expense   $ 1,100.0