v3.25.4
Liability for Future Policyholder Benefits - Reconciliation of the Net Liability for Future Benefits to Life and Health Insurance Reserves and Other Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Liability for Future Policy Benefit, Weighted-Average Duration 13 years 3 months 18 days 13 years 10 months 24 days 15 years 3 months 18 days  
Net Liability for Future Policyholder Benefits, post-flooring $ 2,675.9 $ 2,649.8    
Deferred Profit Liability 481.7 412.1 $ 337.8 $ 253.6
Other 129.9 137.8    
Total Life and Health Insurance Reserves 3,287.5 3,199.7    
Term Life Insurance        
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Expected Future Benefit Payments, undiscounted 9,981.3 10,100.0    
Expected Future Gross Premiums, undiscounted 3,830.7 3,976.4    
Expected Future Gross Premiums, discounted 2,614.7 2,628.1    
Gross Premiums or Assessments 398.6 399.6 399.0  
Interest Expense $ 138.2 $ 139.5 $ 141.3  
Interest Accretion Rate 4.53% 4.55%    
Current Discount Rate 5.71% 5.77%