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v3.23.1

Fair Value of Financial Instruments - Financial Instrument Not Carried at Fair Value (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Level 1 |  |
Investments |  |
Other investments | $ 0.0 | $ 0.0
Deposit asset on reinsurance | 0.0 | 0.0
Financial Liabilities |  |
Investment contract and future policy benefit reserves, fixed annuity contracts | 0.0 | 0.0
Investment contract and future policy benefit reserves, account values on life contracts | 0.0 | 0.0
Other policyholder funds | 0.0 | 0.0
Reverse repurchase agreements | 0.0 | 0.0
Short-term debt | 0.0 | 0.0
Long-term debt | 0.0 | 0.0
Level 2 |  |
Investments |  |
Other investments | 0.0 | 0.0
Deposit asset on reinsurance | 0.0 | 0.0
Financial Liabilities |  |
Investment contract and future policy benefit reserves, fixed annuity contracts | 0.0 | 0.0
Investment contract and future policy benefit reserves, account values on life contracts | 0.0 | 0.0
Other policyholder funds | 888.1 | 810.7
Reverse repurchase agreements | 74.7 | 73.3
Short-term debt | 0.0 | 0.0
Long-term debt | 239.7 | 240.5
Level 3 |  |
Investments |  |
Other investments | 177.8 | 170.9
Deposit asset on reinsurance | 2,270.6 | 2,207.2
Financial Liabilities |  |
Investment contract and future policy benefit reserves, fixed annuity contracts | 4,854.3 | 4,901.3
Investment contract and future policy benefit reserves, account values on life contracts | 109.3 | 107.7
Other policyholder funds | 50.3 | 52.3
Reverse repurchase agreements | 0.0 | 0.0
Short-term debt | 249.0 | 249.0
Long-term debt | 0.0 | 0.0
Carrying Amount |  |
Investments |  |
Other investments | 174.3 | 167.4
Deposit asset on reinsurance | 2,517.9 | 2,516.6
Financial Liabilities |  |
Investment contract and future policy benefit reserves, fixed annuity contracts | 4,954.6 | 4,988.5
Investment contract and future policy benefit reserves, account values on life contracts | 113.3 | 111.9
Other policyholder funds | 938.4 | 863.0
Reverse repurchase agreements | 70.2 | 70.2
Short-term debt | 249.0 | 249.0
Long-term debt | 249.0 | 249.0
Fair Value |  |
Investments |  |
Other investments | 177.8 | 170.9
Deposit asset on reinsurance | 2,270.6 | 2,207.2
Financial Liabilities |  |
Investment contract and future policy benefit reserves, fixed annuity contracts | 4,854.3 | 4,901.3
Investment contract and future policy benefit reserves, account values on life contracts | 109.3 | 107.7
Other policyholder funds | 938.4 | 863.0
Reverse repurchase agreements | 74.7 | 73.3
Short-term debt | 249.0 | 249.0
Long-term debt | $ 239.7 | $ 240.5

X
- Definition Deposit Asset On Reinsurance Fair Value Disclosure + References No definition available. + Details
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Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of accrued obligation to policyholders that relates to insured events under individual and group annuities and supplementary insurance contracts. + References No definition available. + Details
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Namespace Prefix: | hmn_
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- Definition Liability for policyholder account balances life fair value. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Fair Value of the liability as of the balance sheet date to the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported. + References No definition available. + Details
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Period Type: | instant

X
- References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Amount of investments classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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