v3.26.1
Goodwill - Schedule of Goodwill by Segment (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Goodwill [Line Items]    
Goodwill $ 783.5 $ 1,250.7
Specialty Property & Casualty Insurance    
Goodwill [Line Items]    
Goodwill 575.8 1,043.0
Life Insurance    
Goodwill [Line Items]    
Goodwill $ 207.7 $ 207.7