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Residual Commission Buyouts (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Residual Commission Buyouts [Line Items]    
Net Carrying Value $ 980.9  
Residual commission buyouts from asset acquisitions    
Residual Commission Buyouts [Line Items]    
Weighted Average Amortization Period (in years) 4 years 4 years
Carrying Value $ 337.3 $ 323.6
Accumulated Amortization (190.1) (105.7)
Net Carrying Value $ 147.2 $ 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 (3.9) (2.2)
Net Carrying Value 10.0 11.7
Residual Commission Buyouts    
Residual Commission Buyouts [Line Items]    
Carrying Value 351.2 337.5
Accumulated Amortization (194.0) (107.9)
Net Carrying Value $ 157.2 $ 229.6