Accrued Compensation and Benefits - Schedule of Performance Allocations and Incentive Fee Related Compensation (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Retirement Benefits [Abstract] | ||
| Realized | $ 58.2 | $ 252.9 |
| Unrealized | (426.1) | (81.5) |
| Total | $ (367.9) | $ 171.4 |