XML 87 R59.htm IDEA: XBRL DOCUMENT
v3.22.4

Basis of Presentation and Significant Accounting Policies - Schedule of Accounting Standards Update (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2021
ASU 2018-12 Transition [Abstract] |  |  |  |
Liability for future policy benefits | $ 6,968.0 | $ 6,577.8 |  |
Deferred policy acquisition costs | 433.1 | 248.0 |  |
Income before income taxes | (11.9) | 174.9 | $ 159.6 |
Minimum | Accounting Standards Update 2018-12 |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 15.0 | 20.0 |  |
Minimum | Accounting Standards Update 2018-12 | Measurement Input, Discount Rate |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 7.0 | 15.0 |  |
Minimum | Accounting Standards Update 2018-12 | Deferred policy acquisition costs |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 8.0 | 3.0 |  |
Minimum | Accounting Standards Update 2018-12 | Market risk benefits |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 0.0 | 2.0 |  |
Maximum | Accounting Standards Update 2018-12 |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 31.0 | 35.0 |  |
Maximum | Accounting Standards Update 2018-12 | Measurement Input, Discount Rate |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 17.0 | 25.0 |  |
Maximum | Accounting Standards Update 2018-12 | Deferred policy acquisition costs |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 10.0 | 4.0 |  |
Maximum | Accounting Standards Update 2018-12 | Market risk benefits |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Income before income taxes | 4.0 | 6.0 |  |
AOCI |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Liability for future policy benefits |  |  |  | $ (499.3)
Deferred policy acquisition costs |  |  |  | 71.5
Market risk benefits |  |  |  | (1.3)
Total |  |  |  | (429.1)
Retained Earnings |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Liability for future policy benefits |  |  |  | (0.2)
Deferred policy acquisition costs |  |  |  | 0.0
Market risk benefits |  |  |  | (5.4)
Total |  |  |  | $ (5.6)
AOCI and Retained Earnings | Minimum | Accounting Standards Update 2018-12 |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Liability for future policy benefits | 80.0 | (375.0) |  |
Deferred policy acquisition costs | (83.0) | 58.0 |  |
Market risk benefits | (3.0) | (7.0) |  |
Total | (6.0) | (324.0) |  |
AOCI and Retained Earnings | Maximum | Accounting Standards Update 2018-12 |  |  |  |
ASU 2018-12 Transition [Abstract] |  |  |  |
Liability for future policy benefits | 100.0 | (355.0) |  |
Deferred policy acquisition costs | (79.0) | 62.0 |  |
Market risk benefits | 3.0 | (1.0) |  |
Total | $ 24.0 | $ (294.0) |  |

X
- Definition Transition Adjustments + References No definition available. + Details
Name: | hmn_TransitionAdjustments
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_Asu201812TransitionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of deferred policy acquisition cost capitalized on contract remaining in force. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 2B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124505477&loc=SL117422543-158416 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 2B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124505477&loc=SL117422543-158416 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124506110&loc=d3e32546-158582 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(7)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 55 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124504731&loc=d3e11522-158419 + Details
Name: | us-gaap_DeferredPolicyAcquisitionCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126941158&loc=d3e41242-110953 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 29E -URI https://asc.fasb.org/extlink&oid=126561865&loc=SL117819541-158441 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(13)(a)(1)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 + Details
Name: | us-gaap_LiabilityForFuturePolicyBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of guaranteed benefit in excess of current account balance of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782768-158439 + Details
Name: | us-gaap_MarketRiskBenefitNetAmountAtRisk
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201812Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=hmn_MeasurementInputDeferredAcquisitionCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=hmn_MeasurementInputMarketRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=hmn_AOCIAttributableToParentAndRetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |