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v3.24.0.1

Long-Duration Insurance Contracts - Balances of and Changes in the LFPB (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance | $ 1,761.8 | $ 1,718.0 | [1] |  |
Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  | 0.0 |  |  |
Whole Life |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Beginning balance | 215.1 | 183.0 |  | $ 176.5 |
Beginning balance at original discount rate | 245.9 | 157.6 |  | 143.5 |
Beginning period (including reserves) |  |  |  | 260.7 |
Beginning balance at original discount rate (including reserves) |  | 239.3 |  |  |
Change in cash flow assumptions |  | 0.0 |  | 5.2 | $ 2.4
Actual variances from expected experience |  | 3.8 |  | 7.2 | 8.8
Adjusted balance |  | 249.7 |  | 251.7 | 154.7
Issuances | 10.8 | 12.5 |  | 13.3 |
Interest accruals | 7.2 | 6.7 |  | 6.2 |
Net premiums collected | (20.6) | (25.0) |  | (16.6) |
Ending balance at original discount rate | 247.1 | 245.9 |  | 157.6 |
Effect of changes in discount rate assumptions | (23.9) | (30.8) |  | 25.4 |
Ending balance | 223.2 | 215.1 |  | 183.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Beginning balance | 493.6 | 500.7 |  | 507.1 |
Beginning balance (including reserves) |  | 660.4 |  |  |
Beginning balance at original discount rate | 592.1 | 581.9 |  | 386.3 | 362.5
Beginning balance at original discount rate (including reserves) |  | 566.1 |  |  |
Changes in cash flow assumptions |  | (0.6) |  | 5.2 | 2.8
Actual variances from expected experience |  | 4.0 |  | 7.7 | 8.7
Adjusted balance |  | 585.3 |  | 579.0 | 374.0
Issuances | 10.7 | 12.4 |  | 13.3 |
Interest accruals | 19.0 | 18.0 |  | 17.1 |
Benefit payments | (22.9) | (27.5) |  | (18.1) |
Ending balance at original discount rate | 592.1 | 581.9 |  | 386.3 |
Effect of changes in discount rate assumptions | (70.1) | (88.3) |  | 114.4 |
Ending balance | 522.0 | 493.6 |  | 500.7 |
Ending balance (including reserves) |  |  |  | 660.4 |
Liability for Future Policy Benefit, before Reinsurance | 298.8 | 278.4 |  | 317.7 | 330.6
Less: Reinsurance recoverable | (64.3) | (63.1) |  | (0.5) | (0.1)
Less: Change in discount rate assumptions |  |  |  |  | (0.2)
Net liability for future policy benefits, after reinsurance recoverable | 234.5 | 215.3 |  |  |
Impact of flooring on net liability for future policy benefits | 0.0 | 1.1 |  |  |
Net liability for future policy benefits at September 30, 2023 | 234.5 | 216.4 |  | 317.2 | 330.3
Whole Life | Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  |  |  |  | 218.7
Whole Life | Change in discount rate assumptions |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 111.5
Whole Life | Change in cash flow assumptions, effect of net premiums exceeding gross premiums |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.4
Whole Life | Change in cash flow assumptions, effect of decrease of the DPL |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Whole Life | Adjustment for removal of related balances in AOCI |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Term Life |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Beginning balance | 234.7 | 253.1 |  | 244.1 |
Beginning balance at original discount rate | 265.4 | 221.1 |  | 200.8 |
Beginning period (including reserves) |  |  |  | 264.4 |
Beginning balance at original discount rate (including reserves) |  | 235.4 |  |  |
Change in cash flow assumptions |  | (16.8) |  | 18.7 | (4.5)
Actual variances from expected experience |  | (2.7) |  | (4.2) | 6.9
Adjusted balance |  | 245.9 |  | 249.9 | 203.2
Issuances | 25.2 | 28.0 |  | 29.8 |
Interest accruals | 10.3 | 9.0 |  | 7.9 |
Net premiums collected | (24.8) | (21.5) |  | (19.8) |
Ending balance at original discount rate | 256.6 | 265.4 |  | 221.1 |
Effect of changes in discount rate assumptions | (16.6) | (30.7) |  | 32.0 |
Ending balance | 240.0 | 234.7 |  | 253.1 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Beginning balance | 347.0 | 370.6 |  | 364.7 |
Beginning balance (including reserves) |  | 411.5 |  |  |
Beginning balance at original discount rate | 405.4 | 401.0 |  | 319.5 | 294.0
Beginning balance at original discount rate (including reserves) |  | 360.0 |  |  |
Changes in cash flow assumptions |  | (16.7) |  | 21.5 | (4.8)
Actual variances from expected experience |  | 1.3 |  | (4.7) | 7.2
Adjusted balance |  | 385.6 |  | 376.8 | 296.4
Issuances | 25.8 | 28.3 |  | 29.8 |
Interest accruals | 15.2 | 14.4 |  | 12.0 |
Benefit payments | (21.2) | (18.5) |  | (18.7) |
Ending balance at original discount rate | 405.4 | 401.0 |  | 319.5 |
Effect of changes in discount rate assumptions | (35.3) | (54.0) |  | 51.1 |
Ending balance | 370.1 | 347.0 |  | 370.6 |
Ending balance (including reserves) |  |  |  | 411.5 |
Liability for Future Policy Benefit, before Reinsurance | 130.2 | 112.2 |  | 117.6 | 120.5
Less: Reinsurance recoverable | (19.1) | (15.3) |  | (5.5) | (5.4)
Less: Change in discount rate assumptions |  |  |  |  | (0.9)
Net liability for future policy benefits, after reinsurance recoverable | 111.1 | 96.9 |  |  |
Impact of flooring on net liability for future policy benefits | 0.0 | 0.2 |  |  |
Net liability for future policy benefits at September 30, 2023 | 111.1 | 97.1 |  | 112.1 | 114.2
Term Life | Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  |  |  |  | 93.2
Term Life | Change in discount rate assumptions |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 27.3
Term Life | Change in cash flow assumptions, effect of net premiums exceeding gross premiums |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Term Life | Change in cash flow assumptions, effect of decrease of the DPL |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Term Life | Adjustment for removal of related balances in AOCI |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Experience life |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Beginning balance | 68.3 | 74.6 |  | 78.0 |
Beginning balance at original discount rate | 65.5 | 55.8 |  | 55.2 |
Beginning period (including reserves) |  |  |  | 74.6 |
Beginning balance at original discount rate (including reserves) |  | 55.9 |  |  |
Change in cash flow assumptions |  | 3.7 |  | 9.1 | (3.3)
Actual variances from expected experience |  | 0.7 |  | 3.0 | 6.3
Adjusted balance |  | 69.9 |  | 68.0 | 58.2
Issuances | 0.0 | 0.0 |  | 0.0 |
Interest accruals | 3.7 | 3.3 |  | 3.2 |
Net premiums collected | (6.6) | (5.8) |  | (5.6) |
Ending balance at original discount rate | 67.0 | 65.5 |  | 55.8 |
Effect of changes in discount rate assumptions | 4.7 | 2.8 |  | 18.8 |
Ending balance | 71.7 | 68.3 |  | 74.6 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Beginning balance | 867.5 | 1,172.7 |  | 1,269.3 |
Beginning balance (including reserves) |  | 1,172.7 |  |  |
Beginning balance at original discount rate | 797.5 | 805.2 |  | 802.5 | 813.5
Beginning balance at original discount rate (including reserves) |  | 802.6 |  |  |
Changes in cash flow assumptions |  | 5.0 |  | 11.0 | (3.6)
Actual variances from expected experience |  | 1.1 |  | 3.6 | 6.6
Adjusted balance |  | 811.3 |  | 817.2 | 816.5
Issuances | 0.0 | 0.0 |  | 0.0 |
Interest accruals | 47.4 | 47.4 |  | 47.9 |
Benefit payments | (61.2) | (59.4) |  | (61.9) |
Ending balance at original discount rate | 797.5 | 805.2 |  | 802.5 |
Effect of changes in discount rate assumptions | 85.5 | 62.3 |  | 370.2 |
Ending balance | 883.0 | 867.5 |  | 1,172.7 |
Ending balance (including reserves) |  |  |  | 1,172.7 |
Liability for Future Policy Benefit, before Reinsurance | 811.3 | 799.3 |  | 1,098.1 | 1,191.3
Less: Reinsurance recoverable | (1.0) | (0.8) |  | (1.1) | (1.3)
Less: Change in discount rate assumptions |  |  |  |  | (0.7)
Net liability for future policy benefits, after reinsurance recoverable | 810.3 | 798.5 |  |  |
Impact of flooring on net liability for future policy benefits | 0.0 | 0.0 |  |  |
Net liability for future policy benefits at September 30, 2023 | 810.3 | 798.5 |  | 1,097.0 | 1,189.3
Experience life | Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  |  |  |  | 758.3
Experience life | Change in discount rate assumptions |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 433.0
Experience life | Change in cash flow assumptions, effect of net premiums exceeding gross premiums |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Experience life | Change in cash flow assumptions, effect of decrease of the DPL |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Experience life | Adjustment for removal of related balances in AOCI |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Limited-pay whole life |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Beginning balance | 29.7 | 29.7 |  | 25.4 |
Beginning balance at original discount rate | 32.4 | 27.2 |  | 22.0 |
Beginning period (including reserves) |  |  |  | 29.7 |
Beginning balance at original discount rate (including reserves) |  | 27.2 |  |  |
Change in cash flow assumptions |  | (0.2) |  | 2.0 | 0.0
Actual variances from expected experience |  | 1.0 |  | 1.6 | 1.0
Adjusted balance |  | 33.2 |  | 30.8 | 23.0
Issuances | 4.3 | 6.3 |  | 10.2 |
Interest accruals | 1.2 | 1.1 |  | 0.8 |
Net premiums collected | (4.8) | (5.8) |  | (6.8) |
Ending balance at original discount rate | 33.9 | 32.4 |  | 27.2 |
Effect of changes in discount rate assumptions | (1.7) | (2.7) |  | 2.5 |
Ending balance | 32.2 | 29.7 |  | 29.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Beginning balance | 79.4 | 102.9 |  | 95.0 |
Beginning balance (including reserves) |  | 102.9 |  |  |
Beginning balance at original discount rate | 105.6 | 98.6 |  | 86.6 | 73.4
Beginning balance at original discount rate (including reserves) |  | 86.6 |  |  |
Changes in cash flow assumptions |  | (0.2) |  | 2.0 | 0.0
Actual variances from expected experience |  | 1.0 |  | 1.4 | 1.1
Adjusted balance |  | 99.4 |  | 90.0 | 74.5
Issuances | 4.3 | 6.4 |  | 10.2 |
Interest accruals | 3.9 | 3.4 |  | 2.9 |
Benefit payments | (2.0) | (1.2) |  | (1.0) |
Ending balance at original discount rate | 105.6 | 98.6 |  | 86.6 |
Effect of changes in discount rate assumptions | (16.0) | (19.2) |  | 16.3 |
Ending balance | 89.6 | 79.4 |  | 102.9 |
Ending balance (including reserves) |  |  |  | 102.9 |
Liability for Future Policy Benefit, before Reinsurance | 57.4 | 49.6 |  | 73.2 | 69.5
Less: Reinsurance recoverable | (1.2) | 0.0 |  | (0.2) | (0.1)
Less: Change in discount rate assumptions |  |  |  |  | (0.1)
Net liability for future policy benefits, after reinsurance recoverable | 56.2 | 49.6 |  |  |
Impact of flooring on net liability for future policy benefits | 0.0 | 0.0 |  |  |
Net liability for future policy benefits at September 30, 2023 | 56.2 | 49.6 |  | 73.0 | 69.3
Limited-pay whole life | Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  |  |  |  | 51.3
Limited-pay whole life | Change in discount rate assumptions |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 18.2
Limited-pay whole life | Change in cash flow assumptions, effect of net premiums exceeding gross premiums |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Limited-pay whole life | Change in cash flow assumptions, effect of decrease of the DPL |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Limited-pay whole life | Adjustment for removal of related balances in AOCI |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Supplemental health |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Beginning balance | 167.4 | 221.5 |  | 233.0 |
Beginning balance at original discount rate | 205.1 | 217.5 |  | 218.2 |
Beginning period (including reserves) |  |  |  | 226.7 |
Beginning balance at original discount rate (including reserves) |  | 223.1 |  |  |
Change in cash flow assumptions |  | 6.5 |  | 12.2 | (1.8)
Actual variances from expected experience |  | (1.6) |  | (25.3) | 6.3
Adjusted balance |  | 210.0 |  | 210.0 | 222.7
Issuances | 19.4 | 12.0 |  | 13.0 |
Interest accruals | 6.0 | 5.9 |  | 5.9 |
Net premiums collected | (22.0) | (22.8) |  | (24.1) |
Ending balance at original discount rate | 213.4 | 205.1 |  | 217.5 |
Effect of changes in discount rate assumptions | (31.4) | (37.7) |  | 4.0 |
Ending balance | 182.0 | 167.4 |  | 221.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Beginning balance | 431.7 | 580.6 |  | 626.9 |
Beginning balance (including reserves) |  | 590.6 |  |  |
Beginning balance at original discount rate | 517.9 | 537.1 |  | 572.6 | 589.1
Beginning balance at original discount rate (including reserves) |  | 584.2 |  |  |
Changes in cash flow assumptions |  | 8.9 |  | 13.8 | (3.0)
Actual variances from expected experience |  | (2.4) |  | (30.0) | 6.2
Adjusted balance |  | 543.6 |  | 568.0 | 592.3
Issuances | 19.4 | 12.0 |  | 13.0 |
Interest accruals | 14.4 | 15.0 |  | 15.7 |
Benefit payments | (59.5) | (57.9) |  | (48.4) |
Ending balance at original discount rate | 517.9 | 537.1 |  | 572.6 |
Effect of changes in discount rate assumptions | (90.3) | (105.4) |  | 8.0 |
Ending balance | 427.6 | 431.7 |  | 580.6 |
Ending balance (including reserves) |  |  |  | 590.6 |
Liability for Future Policy Benefit, before Reinsurance | 245.6 | 264.4 |  | 359.1 | 415.5
Less: Reinsurance recoverable | (4.0) | (3.4) |  | 0.0 | 0.0
Less: Change in discount rate assumptions |  |  |  |  | 0.0
Net liability for future policy benefits, after reinsurance recoverable | 241.6 | 261.0 |  |  |
Impact of flooring on net liability for future policy benefits | 0.0 | 0.0 |  |  |
Net liability for future policy benefits at September 30, 2023 | 241.6 | 261.0 |  | 359.1 | 415.5
Supplemental health | Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  |  |  |  | 392.5
Supplemental health | Change in discount rate assumptions |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 23.0
Supplemental health | Change in cash flow assumptions, effect of net premiums exceeding gross premiums |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Supplemental health | Change in cash flow assumptions, effect of decrease of the DPL |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Supplemental health | Adjustment for removal of related balances in AOCI |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
Cancer |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Net liability for future policy benefits at September 30, 2023 | 92.7 | 101.8 |  | 140.8 | 163.5
Accident |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Net liability for future policy benefits at September 30, 2023 | 21.4 | 21.8 |  | 28.7 | 31.2
Disability |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Net liability for future policy benefits at September 30, 2023 | 23.5 | 23.1 |  | 29.3 | 32.0
Other |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Net liability for future policy benefits at September 30, 2023 | 104.0 | 114.3 |  | 160.3 | 188.8
SPIA (life contingent) |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Beginning balance | 0.0 | 0.0 |  | 0.0 |
Beginning balance at original discount rate | 0.0 | 0.0 |  | 0.0 |
Beginning period (including reserves) |  |  |  | 0.0 |
Beginning balance at original discount rate (including reserves) |  | 0.0 |  |  |
Change in cash flow assumptions |  | 0.0 |  | 0.0 | 0.0
Actual variances from expected experience |  | 0.0 |  | 0.0 | 0.0
Adjusted balance |  | 0.0 |  | 0.0 | 0.0
Issuances | 5.6 | 5.3 |  | 3.7 |
Interest accruals | 0.0 | 0.0 |  | 0.0 |
Net premiums collected | (5.6) | (5.3) |  | (3.7) |
Ending balance at original discount rate | 0.0 | 0.0 |  | 0.0 |
Effect of changes in discount rate assumptions | 0.0 | 0.0 |  | 0.0 |
Ending balance | 0.0 | 0.0 |  | 0.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Beginning balance | 103.3 | 124.7 |  | 136.5 |
Beginning balance (including reserves) |  | 129.1 |  |  |
Beginning balance at original discount rate | 111.4 | 113.4 |  | 111.6 | 115.9
Beginning balance at original discount rate (including reserves) |  | 115.7 |  |  |
Changes in cash flow assumptions |  | 0.0 |  | 0.0 | 0.0
Actual variances from expected experience |  | (0.8) |  | 0.4 | (0.4)
Adjusted balance |  | 112.6 |  | 116.1 | 115.5
Issuances | 6.3 | 5.3 |  | 3.7 |
Interest accruals | 4.4 | 4.3 |  | 4.5 |
Benefit payments | (11.9) | (12.3) |  | (12.1) |
Ending balance at original discount rate | 111.4 | 113.4 |  | 111.6 |
Effect of changes in discount rate assumptions | (7.2) | (10.1) |  | 13.1 |
Ending balance | 104.2 | 103.3 |  | 124.7 |
Ending balance (including reserves) |  |  |  | 129.1 |
Liability for Future Policy Benefit, before Reinsurance | 104.2 | 103.3 |  | 124.7 | 136.5
Less: Reinsurance recoverable | (3.6) | (3.2) |  | 0.0 | 0.0
Less: Change in discount rate assumptions |  |  |  |  | 0.0
Net liability for future policy benefits, after reinsurance recoverable | 100.6 | 100.1 |  |  |
Impact of flooring on net liability for future policy benefits | 0.0 | 0.0 |  |  |
Net liability for future policy benefits at September 30, 2023 | $ 100.6 | $ 100.1 |  | $ 124.7 | 136.5
SPIA (life contingent) | Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance |  |  |  |  | 115.9
SPIA (life contingent) | Change in discount rate assumptions |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 20.6
SPIA (life contingent) | Change in cash flow assumptions, effect of net premiums exceeding gross premiums |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
SPIA (life contingent) | Change in cash flow assumptions, effect of decrease of the DPL |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | 0.0
SPIA (life contingent) | Adjustment for removal of related balances in AOCI |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Changes in cash flow assumptions |  |  |  |  | $ 0.0
[1] | Recast for the adoption of ASU 2018-12. See Note 1 of the Consolidated Financial Statements

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- Definition Liability for Future Policy Benefit, Adjustment Due To Reserve Flooring + References No definition available. + Details
Name: | hmn_LiabilityForFuturePolicyBenefitAdjustmentDueToReserveFlooring
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Liability For Future Policy Benefit, After Reinsurance, Before Impact Of Flooring + References No definition available. + Details
Name: | hmn_LiabilityForFuturePolicyBenefitAfterReinsuranceBeforeImpactOfFlooring
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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