v3.25.4
Goodwill and Intangible Assets - Schedule of Amortization Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]      
Amortization of definite lived intangible assets $ 63.8 $ 46.3 $ 48.6
Operating Segments      
Finite-Lived Intangible Assets [Line Items]      
Amortization of definite lived intangible assets 22.5 22.6 21.3
Operating Segments | Specialty Property & Casualty Insurance      
Finite-Lived Intangible Assets [Line Items]      
Amortization of definite lived intangible assets 18.8 16.6 17.9
Operating Segments | Life Insurance      
Finite-Lived Intangible Assets [Line Items]      
Amortization of definite lived intangible assets 3.7 6.0 3.4
Corporate and Other      
Finite-Lived Intangible Assets [Line Items]      
Amortization of definite lived intangible assets 17.4 21.8 26.1
Non-Core Operations      
Finite-Lived Intangible Assets [Line Items]      
Amortization of definite lived intangible assets $ 23.9 $ 1.9 $ 1.2