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Residual Commission Buyouts (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Residual Commission Buyouts [Line Items] |  |
Total | $ 3,015.5 |
Residual commission buyouts, net |  |
Residual Commission Buyouts [Line Items] |  |
Gross Carrying Value | 359.4 | $ 351.2
Accumulated Amortization | (251.6) | (194.0)
Total | $ 107.8 | $ 157.2
Residual commission buyouts from asset acquisitions |  |
Residual Commission Buyouts [Line Items] |  |
Weighted Average Amortization Period (in years) | 4 years | 4 years
Gross Carrying Value | $ 345.5 | $ 337.3
Accumulated Amortization | (246.5) | (190.1)
Total | $ 99.0 | $ 147.2
Residual commission buyouts from business combinations |  |
Residual Commission Buyouts [Line Items] |  |
Weighted Average Amortization Period (in years) | 8 years | 8 years
Gross Carrying Value | $ 13.9 | $ 13.9
Accumulated Amortization | (5.1) | (3.9)
Total | $ 8.8 | $ 10.0

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