Residual Commission Buyouts (Details) - USD ($) $ in Millions |
Sep. 30, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Residual Commission Buyouts [Line Items] | ||
| Total | $ 902.7 | |
| Residual commission buyouts, net | ||
| Residual Commission Buyouts [Line Items] | ||
| Carrying Value | 340.5 | $ 337.5 |
| Accumulated Amortization | (173.2) | (107.9) |
| Total | $ 167.3 | $ 229.6 |
| Residual commission buyouts from asset acquisitions | ||
| Residual Commission Buyouts [Line Items] | ||
| Weighted Average Amortization Period (in years) | 4 years | 4 years |
| Carrying Value | $ 326.6 | $ 323.6 |
| Accumulated Amortization | (169.7) | (105.7) |
| Total | $ 156.9 | $ 217.9 |
| Residual commission buyouts from business combinations | ||
| Residual Commission Buyouts [Line Items] | ||
| Weighted Average Amortization Period (in years) | 8 years | 8 years |
| Carrying Value | $ 13.9 | $ 13.9 |
| Accumulated Amortization | (3.5) | (2.2) |
| Total | $ 10.4 | $ 11.7 |