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BUSINESS SEGMENTS - SCHEDULE OF SEGMENT REPORTING INFORMATION BY SEGMENT (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Revenues: |  |  |  |
Insurance policy income | $ 645.0 | $ 626.0 | $ 1,914.9 | $ 1,879.8
Total segment revenues | 1,123.7 | 959.1 | 3,334.7 | 2,999.5
Expenses: |  |  |  |
Insurance policy benefits | 726.2 | 399.1 | 1,926.4 | 1,574.7
Interest expense | 68.0 | 62.6 | 192.4 | 174.9
Other expenses | 269.2 | 247.1 | 798.9 | 775.3
Total segment expenses | 970.2 | 829.3 | 2,957.8 | 2,712.1
Operating earnings before taxes | 153.5 | 129.8 | 376.9 | 287.4
Income tax expense on operating income | 34.3 | 28.5 | 85.6 | 65.2
Net operating income | 119.2 | 101.3 | 291.3 | 222.2
Operating Segments |  |  |  |
Revenues: |  |  |  |
Total segment revenues | 1,123.7 | 959.1 | 3,334.7 | 2,999.5
Expenses: |  |  |  |
Total segment expenses | 970.2 | 829.3 | 2,957.8 | 2,712.1
Insurance Product Lines |  |  |  |
Expenses: |  |  |  |
Allocated expenses | 153.0 | 153.2 | 469.2 | 460.2
Total insurance product margin | 282.2 | 240.0 | 786.9 | 684.4
Operating earnings before taxes | 129.2 | 86.8 | 317.7 | 224.2
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) | 67.6 | (54.6) | 246.2 | 26.3
Investment income not allocated to product lines | 127.1 | 86.2 | 307.0 | 234.3
Expenses: |  |  |  |
Interest credited | 19.9 | 7.2 | 37.5 | 21.6
Market value changes of options credited to fixed indexed annuity and life policyholders | 67.6 | (54.6) | 246.2 | 26.3
Interest expense | 60.1 | 45.1 | 162.8 | 122.3
Impact of annual option forfeitures related to fixed indexed annuity surrenders | (7.4) | (2.5) | (19.6) | (3.9)
Amortization | 0.7 | 0.4 | 1.6 | 1.2
Other expenses | 8.3 | (2.4) | 22.1 | 11.2
Total insurance product margin | 45.5 | 38.4 | 102.6 | 81.9
Fee revenue |  |  |  |
Revenues: |  |  |  |
Fee revenue | 29.3 | 27.9 | 111.8 | 108.6
Expenses: |  |  |  |
Commissions and other operating expenses | 32.0 | 30.8 | 102.4 | 95.4
Total insurance product margin | (2.7) | (2.9) | 9.4 | 13.2
Amounts netted in expenses not allocated to product lines |  |  |  |
Revenues: |  |  |  |
Amounts netted in expenses not allocated to product lines | 0.7 | 32.1 | 3.2 | 35.2
Expenses: |  |  |  |
Expenses not allocated to product lines | 19.2 | 24.6 | 56.0 | 67.1
Total insurance product margin | (18.5) | 7.5 | (52.8) | (31.9)
Annuity: | Insurance Product Lines |  |  |  |
Revenues: |  |  |  |
Insurance policy income | 11.2 | 7.2 | 27.8 | 20.4
Net investment income | 142.2 | 131.0 | 417.2 | 384.1
Total insurance product line revenue | 153.4 | 138.2 | 445.0 | 404.5
Expenses: |  |  |  |
Insurance policy benefits | (25.9) | 9.8 | (23.0) | 29.1
Interest credited | 65.2 | 53.4 | 184.7 | 152.1
Amortization, non-deferred commissions and advertising expense | 23.0 | 18.0 | 64.1 | 51.9
Total expenses | 62.3 | 81.2 | 225.8 | 233.1
Total insurance product margin | 91.1 | 57.0 | 219.2 | 171.4
Health: | Insurance Product Lines |  |  |  |
Revenues: |  |  |  |
Insurance policy income | 406.9 | 397.8 | 1,208.9 | 1,196.3
Net investment income | 75.0 | 74.2 | 224.4 | 222.5
Total insurance product line revenue | 481.9 | 472.0 | 1,433.3 | 1,418.8
Expenses: |  |  |  |
Insurance policy benefits | 314.1 | 308.5 | 924.9 | 949.3
Amortization, non-deferred commissions and advertising expense | 40.0 | 40.3 | 121.7 | 121.6
Total expenses | 354.1 | 348.8 | 1,046.6 | 1,070.9
Total insurance product margin | 127.8 | 123.2 | 386.7 | 347.9
Life: | Insurance Product Lines |  |  |  |
Revenues: |  |  |  |
Insurance policy income | 226.9 | 221.0 | 678.2 | 663.1
Net investment income | 36.8 | 36.3 | 110.0 | 108.7
Total insurance product line revenue | 263.7 | 257.3 | 788.2 | 771.8
Expenses: |  |  |  |
Insurance policy benefits | 143.5 | 140.7 | 432.1 | 430.7
Interest credited | 13.3 | 12.1 | 38.2 | 36.4
Amortization, non-deferred commissions and advertising expense | 43.6 | 44.7 | 136.9 | 139.6
Total expenses | 200.4 | 197.5 | 607.2 | 606.7
Total insurance product margin | 63.3 | 59.8 | 181.0 | 165.1
Allocated expenses | Insurance Product Lines |  |  |  |
Expenses: |  |  |  |
Total insurance product margin | $ (153.0) | $ (153.2) | $ (469.2) | $ (460.2)

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