v3.26.1
BUSINESS SEGMENTS - SCHEDULE OF SEGMENT REPORTING INFORMATION BY SEGMENT (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenues:        
Insurance policy income $ 680.7 $ 651.3 $ 1,354.1 $ 1,302.0
Total segment revenues 1,292.8 1,162.7 2,336.1 2,166.1
Expenses:        
Insurance policy benefits 742.5 658.4 1,319.1 1,228.4
Interest expense 55.3 59.1 106.2 121.1
Other expenses 276.4 271.1 551.7 546.4
Total segment expenses 1,141.8 1,050.4 2,055.2 1,949.2
Operating earnings before taxes 151.0 112.3 280.9 216.9
Income tax expense on operating income 31.5 24.8 60.1 48.3
Net operating income 119.5 87.5 220.8 168.6
Insurance Product Lines        
Expenses:        
Allocated expenses 152.9 149.4 312.8 310.6
Total insurance product margin 279.0 252.4 535.9 501.3
Operating earnings before taxes 126.1 103.0 223.1 190.7
Investment income not allocated to product lines        
Revenues:        
Change in market values of the underlying options supporting fixed indexed products 161.8 79.5 97.3 9.3
Investment income not allocated to product lines 152.9 128.2 270.0 242.0
Expenses:        
Interest credited 36.5 26.9 72.1 54.0
Market value changes of options credited to fixed indexed annuity and life policyholders 161.8 79.5 97.3 9.3
Interest expense 51.4 53.3 98.3 107.5
Impact of annual option forfeitures related to fixed indexed annuity surrenders (5.4) (1.5) (9.6) (5.0)
Amortization 1.1 0.8 2.2 1.6
Other expenses 19.9 14.9 15.9 12.1
Total insurance product margin 49.4 33.8 91.1 71.8
Fee revenue        
Revenues:        
Fee revenue 18.5 33.5 61.3 80.9
Expenses:        
Commissions and other operating expenses 19.7 32.7 51.9 80.9
Total insurance product margin (1.2) 0.8 9.4 0.0
Amounts netted in expenses not allocated to product lines        
Revenues:        
Amounts netted in expenses not allocated to product lines 0.8 1.2 1.8 2.2
Expenses:        
Expenses not allocated to product lines 24.1 26.5 44.5 47.8
Total insurance product margin (23.3) (25.3) (42.7) (45.6)
Annuity: | Insurance Product Lines        
Revenues:        
Insurance policy income 10.2 8.4 18.9 18.2
Net investment income 163.9 155.3 324.9 303.3
Total insurance product line revenue 174.1 163.7 343.8 321.5
Expenses:        
Insurance policy benefits 9.0 10.0 20.6 20.3
Interest credited 75.7 73.4 147.5 141.7
Amortization and non-deferred commissions 28.8 25.5 56.6 50.2
Total expenses 113.5 108.9 224.7 212.2
Total insurance product margin 60.6 54.8 119.1 109.3
Health: | Insurance Product Lines        
Revenues:        
Insurance policy income 436.4 412.5 868.4 824.5
Net investment income 75.8 75.9 150.3 151.0
Total insurance product line revenue 512.2 488.4 1,018.7 975.5
Expenses:        
Insurance policy benefits 322.3 313.3 653.5 633.6
Amortization and non-deferred commissions 42.7 41.1 85.4 81.7
Total expenses 365.0 354.4 738.9 715.3
Total insurance product margin 147.2 134.0 279.8 260.2
Life: | Insurance Product Lines        
Revenues:        
Insurance policy income 234.1 230.4 466.8 459.3
Net investment income 38.4 37.8 76.4 75.4
Total insurance product line revenue 272.5 268.2 543.2 534.7
Expenses:        
Insurance policy benefits 139.3 144.5 282.7 282.6
Interest credited 14.2 13.8 27.9 26.8
Amortization and non-deferred commissions 30.3 27.6 59.8 53.6
Advertising expense 17.5 18.7 35.8 39.9
Total expenses 201.3 204.6 406.2 402.9
Total insurance product margin 71.2 63.6 137.0 131.8
Allocated expenses | Insurance Product Lines        
Expenses:        
Total insurance product margin $ (152.9) $ (149.4) $ (312.8) $ (310.6)