v3.25.2
Segment Information - Additional Significant Financial Information by Segment (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Segment Reporting Information    
Assets $ 14,728.3 $ 14,487.8
Corporate & Other    
Segment Reporting Information    
Assets 193.5 191.0
Operating Segments | Property & Casualty    
Segment Reporting Information    
Assets 1,335.2 1,272.3
Operating Segments | Life & Retirement    
Segment Reporting Information    
Assets 11,865.7 11,670.7
Operating Segments | Supplemental & Group Benefits    
Segment Reporting Information    
Assets 1,370.2 1,377.6
Intersegment eliminations    
Segment Reporting Information    
Assets $ (36.3) $ (23.8)