v3.26.3
Deferred Acquisition Costs and Other Actuarial Balances - Benefits and Protection - Balances and changes in DAC (Details) - Benefits and Protection - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Individual disability | Specialty Benefits    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs $ 714.8 $ 696.9
Costs deferred 58.1 71.9
Amortized to expense (41.6) (54.0)
Ending balance, Deferred acquisition costs 731.3 714.8
Universal life | Life Insurance    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs 1,514.3 1,527.7
Costs deferred 62.7 81.2
Amortized to expense (70.7) (94.6)
Ending balance, Deferred acquisition costs 1,506.3 1,514.3
Term life | Life Insurance    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs 723.5 710.8
Costs deferred 52.9 75.6
Amortized to expense (48.4) (62.9)
Ending balance, Deferred acquisition costs 728.0 723.5
Participating life | Life Insurance    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs 71.0 77.8
Costs deferred 0.9 1.2
Amortized to expense (5.6) (8.0)
Ending balance, Deferred acquisition costs $ 66.3 $ 71.0