v3.25.2
Investments - Net Investment Income (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Net Investment Income        
Total net investment income $ 110.8 $ 108.4 $ 226.7 $ 213.8
Investment Portfolio        
Net Investment Income        
Investment expenses (3.1) (3.2) (5.9) (5.8)
Total net investment income 85.7 82.7 177.2 162.6
Deposit Asset on Reinsurance        
Net Investment Income        
Total net investment income 25.1 25.7 49.5 51.2
Fixed maturity securities | Investment Portfolio        
Net Investment Income        
Net investment income 59.4 72.0 131.0 142.4
Equity securities | Investment Portfolio        
Net Investment Income        
Net investment income 1.0 1.4 2.0 2.6
Limited partnership interests | Investment Portfolio        
Net Investment Income        
Net investment income 23.2 8.2 39.5 14.4
Short-term and other investments | Investment Portfolio        
Net Investment Income        
Net investment income $ 5.2 $ 4.3 $ 10.6 $ 9.0