v3.26.3
Future Policy Benefits and Claims - Liability for Unpaid Claims (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Change in unpaid claims    
Balance at beginning of period, unpaid claims $ 1,342.4 $ 1,379.9
Balance at beginning of period, reinsurance recoverables for unpaid claims 62.6 61.2
Net balance at beginning of period, unpaid claims 1,279.8 1,318.7
Balance of operations acquired 7.2  
Incurred:    
Incurred: Current year 1,379.6 1,368.5
Incurred: Prior years (112.6) (101.9)
Total incurred 1,267.0 1,266.6
Payments:    
Payments: Current year 1,007.5 984.3
Payments: Prior years 304.9 317.7
Total payments 1,312.4 1,302.0
Net balance at end of period, unpaid claims 1,241.6 1,283.3
Balance at end of period, reinsurance recoverables for unpaid claims 60.2 61.1
Balance at end of period, unpaid claims $ 1,301.8 $ 1,344.4