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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, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Revenues: |  |  |  |
Insurance policy income | $ 626.0 | $ 623.2 | $ 1,879.8 | $ 1,873.8
Total segment revenues | 959.1 | 910.1 | 2,999.5 | 2,675.0
Expenses: |  |  |  |
Insurance policy benefits | 399.1 | 396.1 | 1,574.7 | 1,032.2
Interest expense | 62.6 | 37.6 | 174.9 | 89.2
Other expenses | 247.1 | 230.1 | 775.3 | 670.9
Total segment expenses | 829.3 | 809.1 | 2,712.1 | 2,315.3
Operating earnings before taxes | 129.8 | 101.0 | 287.4 | 359.7
Income tax expense on operating income | 28.5 | 23.1 | 65.2 | 82.2
Net operating income | 101.3 | 77.9 | 222.2 | 277.5
Operating Segments |  |  |  |
Revenues: |  |  |  |
Total segment revenues | 959.1 | 910.1 | 2,999.5 | 2,675.0
Expenses: |  |  |  |
Total segment expenses | 829.3 | 809.1 | 2,712.1 | 2,315.3
Insurance Product Lines |  |  |  |
Expenses: |  |  |  |
Allocated expenses | 153.2 | 150.5 | 460.2 | 447.5
Total insurance product margin | 240.0 | 239.1 | 684.4 | 702.0
Operating earnings before taxes | 86.8 | 88.6 | 224.2 | 254.5
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) | (54.6) | (34.9) | 26.3 | (199.2)
Investment income not allocated to product lines | 86.2 | 59.6 | 234.3 | 187.4
Expenses: |  |  |  |
Interest credited | 7.2 | 7.2 | 21.6 | 21.3
Market value changes of options credited to fixed indexed annuity and life policyholders | (54.6) | (34.9) | 26.3 | (199.2)
Interest expense | 45.1 | 25.9 | 122.3 | 64.3
Impact of annual option forfeitures related to fixed indexed annuity surrenders | (2.5) | 1.1 | (3.9) | 0.0
Amortization | 0.4 | 0.3 | 1.2 | 1.1
Other expenses | (2.4) | (2.0) | 11.2 | (18.0)
Total insurance product margin | 38.4 | 27.1 | 81.9 | 118.7
Amounts netted in expenses not allocated to product lines |  |  |  |
Revenues: |  |  |  |
Amounts netted in expenses not allocated to product lines | 32.1 | 1.8 | 35.2 | 28.9
Expenses: |  |  |  |
Expenses not allocated to product lines | 24.6 | 17.9 | 67.1 | 56.9
Total insurance product margin | 7.5 | (16.1) | (31.9) | (28.0)
Fee income |  |  |  |
Revenues: |  |  |  |
Fee income | 27.9 | 30.6 | 108.6 | 102.0
Expenses: |  |  |  |
Commissions and other operating expenses | 30.8 | 29.2 | 95.4 | 87.5
Total insurance product margin | (2.9) | 1.4 | 13.2 | 14.5
Annuity: | Insurance Product Lines |  |  |  |
Revenues: |  |  |  |
Insurance policy income | 7.2 | 6.3 | 20.4 | 17.1
Net investment income | 131.0 | 121.1 | 384.1 | 356.4
Total insurance product line revenue | 138.2 | 127.4 | 404.5 | 373.5
Expenses: |  |  |  |
Insurance policy benefits | 9.8 | 6.5 | 29.1 | 22.8
Interest credited | 53.4 | 44.8 | 152.1 | 128.7
Amortization and non-deferred commissions | 18.0 | 16.0 | 51.9 | 45.9
Total expenses | 81.2 | 67.3 | 233.1 | 197.4
Total insurance product margin | 57.0 | 60.1 | 171.4 | 176.1
Health: | Insurance Product Lines |  |  |  |
Revenues: |  |  |  |
Insurance policy income | 397.8 | 403.5 | 1,196.3 | 1,213.7
Net investment income | 74.2 | 73.3 | 222.5 | 219.6
Total insurance product line revenue | 472.0 | 476.8 | 1,418.8 | 1,433.3
Expenses: |  |  |  |
Insurance policy benefits | 308.5 | 310.8 | 949.3 | 943.8
Amortization and non-deferred commissions | 40.3 | 42.7 | 121.6 | 125.5
Total expenses | 348.8 | 353.5 | 1,070.9 | 1,069.3
Total insurance product margin | 123.2 | 123.3 | 347.9 | 364.0
Life: | Insurance Product Lines |  |  |  |
Revenues: |  |  |  |
Insurance policy income | 221.0 | 213.4 | 663.1 | 643.0
Net investment income | 36.3 | 35.4 | 108.7 | 106.1
Total insurance product line revenue | 257.3 | 248.8 | 771.8 | 749.1
Expenses: |  |  |  |
Insurance policy benefits | 140.7 | 138.7 | 430.7 | 419.5
Interest credited | 12.1 | 12.6 | 36.4 | 36.3
Amortization and non-deferred commissions | 44.7 | 41.8 | 139.6 | 131.4
Total expenses | 197.5 | 193.1 | 606.7 | 587.2
Total insurance product margin | 59.8 | 55.7 | 165.1 | 161.9
Allocated expenses | Insurance Product Lines |  |  |  |
Expenses: |  |  |  |
Total insurance product margin | $ (153.2) | $ (150.5) | $ (460.2) | $ (447.5)

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