v3.26.1
Short- Duration Insurance Contracts - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Property & Casualty        
Segment Reporting [Line Items]        
Favorable (unfavorable) development of total reserves for claims occurring in prior years $ 6.6 $ 5.5 $ 11.6 $ 10.8
Group Benefits        
Segment Reporting [Line Items]        
Favorable (unfavorable) development of total reserves for claims occurring in prior years $ 1.6 $ 3.0 $ 4.3 $ 2.6