v3.26.1
Deferred Acquisition Costs and Other Actuarial Balances - Benefits and Protection - Balances and changes in DAC (Details) - Benefits and Protection - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Individual disability | Specialty Benefits    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs $ 714.8 $ 696.9
Costs deferred 37.3 71.9
Amortized to expense (27.5) (54.0)
Ending balance, Deferred acquisition costs 724.6 714.8
Universal life | Life Insurance    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs 1,514.3 1,527.7
Costs deferred 41.9 81.2
Amortized to expense (47.2) (94.6)
Ending balance, Deferred acquisition costs 1,509.0 1,514.3
Term life | Life Insurance    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs 723.5 710.8
Costs deferred 35.6 75.6
Amortized to expense (32.2) (62.9)
Ending balance, Deferred acquisition costs 726.9 723.5
Participating life | Life Insurance    
Deferred Acquisition Costs    
Beginning balance, Deferred acquisition costs 71.0 77.8
Costs deferred 0.7 1.2
Amortized to expense (3.8) (8.0)
Ending balance, Deferred acquisition costs $ 67.9 $ 71.0