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BUSINESS SEGMENTS - SCHEDULE OF SEGMENT REPORTING INFORMATION BY SEGMENT (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Revenues: |  |  |  |  |  |
Insurance policy income | $ 658.4 |  | $ 645.0 | $ 1,960.4 | $ 1,914.9 |
Total segment revenues | 1,187.1 |  | 1,123.7 | 3,353.2 | 3,334.7 |
Expenses: |  |  |  |  |  |
Insurance policy benefits | 702.1 | $ 570.0 | 731.0 | 1,930.5 | 1,942.0 | $ 2,450.3
Interest expense | 56.6 |  | 68.0 | 177.7 | 192.4 |
Other expenses | 270.4 |  | 269.2 | 816.8 | 798.9 |
Total segment expenses | 1,024.3 |  | 970.2 | 2,973.5 | 2,957.8 |
Operating earnings before taxes | 162.8 |  | 153.5 | 379.7 | 376.9 |
Income tax expense on operating income | 35.6 |  | 34.3 | 83.9 | 85.6 |
Net operating income | 127.2 |  | 119.2 | 295.8 | 291.3 |
Insurance Product Lines |  |  |  |  |  |
Expenses: |  |  |  |  |  |
Allocated expenses | 151.0 |  | 153.0 | 461.6 | 469.2 |
Total insurance product margin | 300.5 |  | 282.2 | 801.8 | 786.9 |
Operating earnings before taxes | 149.5 |  | 129.2 | 340.2 | 317.7 |
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) | 98.2 |  | 67.6 | 107.5 | 246.2 |
Investment income not allocated to product lines | 126.0 |  | 127.1 | 368.0 | 307.0 |
Expenses: |  |  |  |  |  |
Interest credited | 28.2 |  | 19.9 | 82.2 | 37.5 |
Market value changes of options credited to fixed indexed annuity and life policyholders | 98.2 |  | 67.6 | 107.5 | 246.2 |
Interest expense | 50.8 |  | 60.1 | 158.3 | 162.8 |
Impact of annual option forfeitures related to fixed indexed annuity surrenders | (3.8) |  | (7.4) | (8.8) | (19.6) |
Amortization | 0.9 |  | 0.7 | 2.5 | 1.6 |
Other expenses | 10.4 |  | 8.3 | 22.5 | 22.1 |
Total insurance product margin | 39.5 |  | 45.5 | 111.3 | 102.6 |
Fee revenue |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Fee revenue | 33.0 |  | 29.3 | 113.9 | 111.8 |
Expenses: |  |  |  |  |  |
Commissions and other operating expenses | 36.9 |  | 32.0 | 117.8 | 102.4 |
Total insurance product margin | (3.9) |  | (2.7) | (3.9) | 9.4 |
Amounts netted in expenses not allocated to product lines |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Amounts netted in expenses not allocated to product lines | 0.6 |  | 0.7 | 2.8 | 3.2 |
Expenses: |  |  |  |  |  |
Expenses not allocated to product lines | 22.9 |  | 19.2 | 70.7 | 56.0 |
Total insurance product margin | (22.3) |  | (18.5) | (67.9) | (52.8) |
Annuity: | Insurance Product Lines |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Insurance policy income | 10.7 |  | 11.2 | 28.9 | 27.8 |
Net investment income | 157.7 |  | 142.2 | 461.0 | 417.2 |
Total insurance product line revenue | 168.4 |  | 153.4 | 489.9 | 445.0 |
Expenses: |  |  |  |  |  |
Insurance policy benefits | (6.2) |  | (25.9) | 14.1 | (23.0) |
Interest credited | 75.4 |  | 65.2 | 217.1 | 184.7 |
Amortization and non-deferred commissions | 26.3 |  | 23.0 | 76.5 | 64.1 |
Total expenses | 95.5 |  | 62.3 | 307.7 | 225.8 |
Total insurance product margin | 72.9 |  | 91.1 | 182.2 | 219.2 |
Health: | Insurance Product Lines |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Insurance policy income | 416.0 |  | 406.9 | 1,240.5 | 1,208.9 |
Net investment income | 75.4 |  | 75.0 | 226.4 | 224.4 |
Total insurance product line revenue | 491.4 |  | 481.9 | 1,466.9 | 1,433.3 |
Expenses: |  |  |  |  |  |
Insurance policy benefits | 293.3 |  | 314.1 | 926.9 | 924.9 |
Amortization and non-deferred commissions | 41.1 |  | 40.0 | 122.8 | 121.7 |
Total expenses | 334.4 |  | 354.1 | 1,049.7 | 1,046.6 |
Total insurance product margin | 157.0 |  | 127.8 | 417.2 | 386.7 |
Life: | Insurance Product Lines |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Insurance policy income | 231.7 |  | 226.9 | 691.0 | 678.2 |
Net investment income | 37.8 |  | 36.8 | 113.2 | 110.0 |
Total insurance product line revenue | 269.5 |  | 263.7 | 804.2 | 788.2 |
Expenses: |  |  |  |  |  |
Insurance policy benefits | 142.6 |  | 143.5 | 425.2 | 432.1 |
Interest credited | 13.2 |  | 13.3 | 40.0 | 38.2 |
Amortization and non-deferred commissions | 28.3 |  | 25.1 | 81.9 | 72.9 |
Advertising expense | 14.8 |  | 18.5 | 54.7 | 64.0 |
Total expenses | 198.9 |  | 200.4 | 601.8 | 607.2 |
Total insurance product margin | 70.6 |  | 63.3 | 202.4 | 181.0 |
Allocated expenses | Insurance Product Lines |  |  |  |  |  |
Expenses: |  |  |  |  |  |
Total insurance product margin | $ (151.0) |  | $ (153.0) | $ (461.6) | $ (469.2) |

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