Accrued Compensation and Benefits - Schedule of Performance Allocations and Incentive Fee Related Compensation (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Retirement Benefits [Abstract] | ||||
| Realized | $ 230.7 | $ 189.4 | $ 288.9 | $ 442.3 |
| Unrealized | (137.1) | 254.2 | (563.2) | 172.7 |
| Total | $ 93.6 | $ 443.6 | $ (274.3) | $ 615.0 |