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BUSINESS SEGMENTS - SCHEDULE OF SEGMENT REPORTING INFORMATION BY SEGMENT (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2024
Revenues: |  |  |  |  |  |  |  |
Insurance policy income | $ 651.3 |  |  | $ 641.5 | $ 1,302.0 | $ 1,269.9 |  |
Total segment revenues | 1,162.7 |  |  | 1,074.3 | 2,166.1 | 2,211.0 |  |
Expenses: |  |  |  |  |  |  |  |
Insurance policy benefits | 658.4 | $ 570.0 | $ 731.0 | 574.4 | 1,228.4 | 1,211.0 | $ 1,942.0 | $ 2,450.3
Interest expense | 59.1 |  |  | 64.2 | 121.1 | 124.4 |  |
Other expenses | 271.1 |  |  | 251.4 | 546.4 | 529.7 |  |
Total segment expenses | 1,050.4 |  |  | 925.7 | 1,949.2 | 1,987.6 |  |
Operating earnings before taxes | 112.3 |  |  | 148.6 | 216.9 | 223.4 |  |
Income tax expense on operating income | 24.8 |  |  | 34.0 | 48.3 | 51.3 |  |
Net operating income | 87.5 |  |  | 114.6 | 168.6 | 172.1 |  |
Insurance Product Lines |  |  |  |  |  |  |  |
Expenses: |  |  |  |  |  |  |  |
Allocated expenses | 149.4 |  |  | 154.6 | 310.6 | 316.2 |  |
Total insurance product margin | 252.4 |  |  | 275.1 | 501.3 | 504.7 |  |
Operating earnings before taxes | 103.0 |  |  | 120.5 | 190.7 | 188.5 |  |
Investment income not allocated to product lines |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Change in market values of the underlying options supporting the fixed indexed annuity and life products (offset by market value changes credited to policyholder balances) | 79.5 |  |  | 38.9 | 9.3 | 178.6 |  |
Investment income not allocated to product lines | 128.2 |  |  | 108.3 | 242.0 | 179.9 |  |
Expenses: |  |  |  |  |  |  |  |
Interest credited | 26.9 |  |  | 10.4 | 54.0 | 17.6 |  |
Market value changes of options credited to fixed indexed annuity and life policyholders | 79.5 |  |  | 38.9 | 9.3 | 178.6 |  |
Interest expense | 53.3 |  |  | 54.4 | 107.5 | 102.7 |  |
Impact of annual option forfeitures related to fixed indexed annuity surrenders | (1.5) |  |  | (6.0) | (5.0) | (12.2) |  |
Amortization | 0.8 |  |  | 0.5 | 1.6 | 0.9 |  |
Other expenses | 14.9 |  |  | 4.2 | 12.1 | 13.8 |  |
Total insurance product margin | 33.8 |  |  | 44.8 | 71.8 | 57.1 |  |
Fee revenue |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Fee revenue | 33.5 |  |  | 32.0 | 80.9 | 82.5 |  |
Expenses: |  |  |  |  |  |  |  |
Commissions and other operating expenses | 32.7 |  |  | 31.2 | 80.9 | 70.4 |  |
Total insurance product margin | 0.8 |  |  | 0.8 | 0.0 | 12.1 |  |
Amounts netted in expenses not allocated to product lines |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Amounts netted in expenses not allocated to product lines | 1.2 |  |  | 1.3 | 2.2 | 2.5 |  |
Expenses: |  |  |  |  |  |  |  |
Expenses not allocated to product lines | 26.5 |  |  | 18.8 | 47.8 | 36.8 |  |
Total insurance product margin | (25.3) |  |  | (17.5) | (45.6) | (34.3) |  |
Annuity: | Insurance Product Lines |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Insurance policy income | 8.4 |  |  | 9.3 | 18.2 | 16.6 |  |
Net investment income | 155.3 |  |  | 140.5 | 303.3 | 275.0 |  |
Total insurance product line revenue | 163.7 |  |  | 149.8 | 321.5 | 291.6 |  |
Expenses: |  |  |  |  |  |  |  |
Insurance policy benefits | 10.0 |  |  | (8.4) | 20.3 | 2.9 |  |
Interest credited | 73.4 |  |  | 61.2 | 141.7 | 119.5 |  |
Amortization and non-deferred commissions | 25.5 |  |  | 20.9 | 50.2 | 41.1 |  |
Total expenses | 108.9 |  |  | 73.7 | 212.2 | 163.5 |  |
Total insurance product margin | 54.8 |  |  | 76.1 | 109.3 | 128.1 |  |
Health: | Insurance Product Lines |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Insurance policy income | 412.5 |  |  | 403.6 | 824.5 | 802.0 |  |
Net investment income | 75.9 |  |  | 75.1 | 151.0 | 149.4 |  |
Total insurance product line revenue | 488.4 |  |  | 478.7 | 975.5 | 951.4 |  |
Expenses: |  |  |  |  |  |  |  |
Insurance policy benefits | 313.3 |  |  | 302.3 | 633.6 | 610.8 |  |
Amortization and non-deferred commissions | 41.1 |  |  | 40.5 | 81.7 | 81.7 |  |
Total expenses | 354.4 |  |  | 342.8 | 715.3 | 692.5 |  |
Total insurance product margin | 134.0 |  |  | 135.9 | 260.2 | 258.9 |  |
Life: | Insurance Product Lines |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Insurance policy income | 230.4 |  |  | 228.6 | 459.3 | 451.3 |  |
Net investment income | 37.8 |  |  | 36.7 | 75.4 | 73.2 |  |
Total insurance product line revenue | 268.2 |  |  | 265.3 | 534.7 | 524.5 |  |
Expenses: |  |  |  |  |  |  |  |
Insurance policy benefits | 144.5 |  |  | 144.6 | 282.6 | 288.6 |  |
Interest credited | 13.8 |  |  | 12.4 | 26.8 | 24.9 |  |
Amortization and non-deferred commissions | 27.6 |  |  | 24.3 | 53.6 | 47.8 |  |
Advertising expense | 18.7 |  |  | 20.9 | 39.9 | 45.5 |  |
Total expenses | 204.6 |  |  | 202.2 | 402.9 | 406.8 |  |
Total insurance product margin | 63.6 |  |  | 63.1 | 131.8 | 117.7 |  |
Allocated expenses | Insurance Product Lines |  |  |  |  |  |  |  |
Expenses: |  |  |  |  |  |  |  |
Total insurance product margin | $ (149.4) |  |  | $ (154.6) | $ (310.6) | $ (316.2) |  |

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