XML 101 R72.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Fair Value of Financial Instruments - Financial Instruments Measured and Carried at Fair Value (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financial Assets |  |
Fair value of issued securities | $ 6,239.3 | $ 6,345.3
Equity securities at fair value | 147.2 | 121.6
Mortgage-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 662.5 | 684.8
Other, including U.S. Treasury securities |  |
Financial Assets |  |
Fair value of issued securities | 365.9 | 433.2
Municipal bonds |  |
Financial Assets |  |
Fair value of issued securities | 1,703.4 | 1,827.5
Foreign government bonds |  |
Financial Assets |  |
Fair value of issued securities | 43.6 | 45.1
Corporate bonds |  |
Financial Assets |  |
Fair value of issued securities | 2,388.7 | 2,122.9
Other asset-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 1,075.2 | 1,231.8
Carrying Value |  |
Financial Assets |  |
Equity securities at fair value | 147.2 | 121.6
Short-term investments | 157.8 | 141.8
Other investments | 43.6 | 36.3
Totals | 6,587.9 | 6,645.0
Separate account (variable annuity) assets | 3,441.0 | 2,891.4
Financial Liabilities |  |
Investment contract and life policy reserves, embedded derivatives | 2.1 | 2.5
Other policyholder funds, embedded derivatives | 106.6 | 104.5
Carrying Value | Recurring |  |
Financial Assets |  |
Fair value of issued securities | 6,239.3 | 6,345.3
Carrying Value | Mortgage-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 662.5 | 684.8
Carrying Value | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Fair value of issued securities | 365.9 | 433.2
Carrying Value | Municipal bonds |  |
Financial Assets |  |
Fair value of issued securities | 1,703.4 | 1,827.5
Carrying Value | Foreign government bonds |  |
Financial Assets |  |
Fair value of issued securities | 43.6 | 45.1
Carrying Value | Corporate bonds |  |
Financial Assets |  |
Fair value of issued securities | 2,388.7 | 2,122.9
Carrying Value | Other asset-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 1,075.2 | 1,231.8
Fair Value |  |
Financial Assets |  |
Equity securities at fair value | 147.2 | 121.6
Short-term investments | 157.8 | 141.8
Other investments | 43.6 | 36.3
Totals | 6,587.9 | 6,645.0
Separate account (variable annuity) assets | 3,441.0 | 2,891.4
Financial Liabilities |  |
Investment contract and life policy reserves, embedded derivatives | 2.1 | 2.5
Other policyholder funds, embedded derivatives | 106.6 | 104.5
Fair Value | Recurring |  |
Financial Assets |  |
Fair value of issued securities | 6,239.3 | 6,345.3
Fair Value | Mortgage-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 662.5 | 684.8
Fair Value | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Fair value of issued securities | 365.9 | 433.2
Fair Value | Municipal bonds |  |
Financial Assets |  |
Fair value of issued securities | 1,703.4 | 1,827.5
Fair Value | Foreign government bonds |  |
Financial Assets |  |
Fair value of issued securities | 43.6 | 45.1
Fair Value | Corporate bonds |  |
Financial Assets |  |
Fair value of issued securities | 2,388.7 | 2,122.9
Fair Value | Other asset-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 1,075.2 | 1,231.8
Fair Value | Level 1 |  |
Financial Assets |  |
Equity securities at fair value | 35.2 | 39.2
Short-term investments | 157.8 | 137.7
Other investments | 0.0 | 0.0
Totals | 225.6 | 210.2
Separate account (variable annuity) assets | 3,441.0 | 2,891.4
Financial Liabilities |  |
Investment contract and life policy reserves, embedded derivatives | 0.0 | 0.0
Other policyholder funds, embedded derivatives | 0.0 | 0.0
Fair Value | Level 1 | Recurring |  |
Financial Assets |  |
Fair value of issued securities | 32.6 | 33.3
Fair Value | Level 1 | Mortgage-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 0.0
Fair Value | Level 1 | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Fair value of issued securities | 17.7 | 18.4
Fair Value | Level 1 | Municipal bonds |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 0.0
Fair Value | Level 1 | Foreign government bonds |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 0.0
Fair Value | Level 1 | Corporate bonds |  |
Financial Assets |  |
Fair value of issued securities | 14.9 | 14.9
Fair Value | Level 1 | Other asset-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 0.0
Fair Value | Level 2 |  |
Financial Assets |  |
Equity securities at fair value | 110.6 | 82.1
Short-term investments | 0.0 | 4.1
Other investments | 43.6 | 36.3
Totals | 5,990.9 | 6,079.7
Separate account (variable annuity) assets | 0.0 | 0.0
Financial Liabilities |  |
Investment contract and life policy reserves, embedded derivatives | 2.1 | 2.5
Other policyholder funds, embedded derivatives | 0.0 | 0.0
Fair Value | Level 2 | Recurring |  |
Financial Assets |  |
Fair value of issued securities | 5,836.7 | 5,957.2
Fair Value | Level 2 | Mortgage-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 662.5 | 673.7
Fair Value | Level 2 | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Fair value of issued securities | 348.2 | 414.8
Fair Value | Level 2 | Municipal bonds |  |
Financial Assets |  |
Fair value of issued securities | 1,642.6 | 1,767.9
Fair Value | Level 2 | Foreign government bonds |  |
Financial Assets |  |
Fair value of issued securities | 43.6 | 45.1
Fair Value | Level 2 | Corporate bonds |  |
Financial Assets |  |
Fair value of issued securities | 2,163.5 | 1,952.2
Fair Value | Level 2 | Other asset-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 976.3 | 1,103.5
Fair Value | Level 3 |  |
Financial Assets |  |
Equity securities at fair value | 1.4 | 0.3
Short-term investments | 0.0 | 0.0
Other investments | 0.0 | 0.0
Totals | 371.4 | 355.1
Separate account (variable annuity) assets | 0.0 | 0.0
Financial Liabilities |  |
Investment contract and life policy reserves, embedded derivatives | 0.0 | 0.0
Other policyholder funds, embedded derivatives | 106.6 | 104.5
Fair Value | Level 3 | Recurring |  |
Financial Assets |  |
Fair value of issued securities | 370.0 | 354.8
Fair Value | Level 3 | Mortgage-backed securities |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 11.1
Fair Value | Level 3 | Other, including U.S. Treasury securities |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 0.0
Fair Value | Level 3 | Municipal bonds |  |
Financial Assets |  |
Fair value of issued securities | 60.8 | 59.6
Fair Value | Level 3 | Foreign government bonds |  |
Financial Assets |  |
Fair value of issued securities | 0.0 | 0.0
Fair Value | Level 3 | Corporate bonds |  |
Financial Assets |  |
Fair value of issued securities | 210.3 | 155.8
Fair Value | Level 3 | Other asset-backed securities |  |
Financial Assets |  |
Fair value of issued securities | $ 98.9 | $ 128.3

X
- Definition Fair value disclosure of accrued obligation to policyholders that relates to insured events under other insurance contracts. + References No definition available. + Details
Name: | hmn_LiabilityForFuturePolicyBenefitsDerivativeInstrumentsFairValueDisclosure
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other Investment Fair Value Disclosure + References No definition available. + Details
Name: | hmn_OtherInvestmentFairValueDisclosure
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of the liability as of the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported. + References No definition available. + Details
Name: | hmn_OtherPolicyholderFundsDerivativeInstrumentsFairValueDisclosure
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value amount of the specified investment category of assets maintained in separate accounts as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=124504833&loc=d3e7104-158389 + Details
Name: | us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(4)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(5)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(g)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_ShortTermInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=hmn_OtherIncludingUSTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |