v3.25.4
Property and Casualty Insurance Reserves - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Liability for Claims and Claims Adjustment Expense [Line Items]          
Actuary estimate period used for ultimate and LAE   10 years      
Reinsurance recoverables $ 78.7 $ 78.1 $ 78.7    
Non-Core Operations          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Incurred losses and LAE related to prior year (favorable) adverse development 22.6     $ 24.8  
Property and Liability Insurance          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Incurred losses and LAE related to prior year (favorable) adverse development   76.0 29.8 159.8  
Reinsurance recoverables $ 24.3 25.6 24.3 27.8 $ 39.6
Commercial Automobile          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Incurred losses and LAE related to prior year (favorable) adverse development   $ 76.5 $ 7.2 24.2  
Specialty Automobile          
Liability for Claims and Claims Adjustment Expense [Line Items]          
Incurred losses and LAE related to prior year (favorable) adverse development       $ 108.7