XML 82 R65.htm IDEA: XBRL DOCUMENT
v3.25.4

Mortgage Loans, Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Financing Receivable, Allowance for Credit Loss, Beginning Balance |  | $ 16.1 |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | 15.9 | $ 16.1
Commercial Real Estate |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Financing Receivable, Allowance for Credit Loss, Beginning Balance |  | 16.1 | 10.2
Financing Receivable, Credit Loss, Expense (Reversal) |  | 0.6 | 12.9
Financing Receivable, Allowance for Credit Loss, Writeoff |  | (0.8) | (7.0)
Financing Receivable, Allowance for Credit Loss, Recovery |  | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | 15.9 | 16.1
Commercial Real Estate | Loan to Value Ratio Below or Equal to 65 Percent |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Financing Receivable, Allowance for Credit Loss, Beginning Balance | [1] | 4.2 | 3.8
Financing Receivable, Credit Loss, Expense (Reversal) | [1] | 0.1 | 0.4
Financing Receivable, Allowance for Credit Loss, Writeoff | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Recovery | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance | [1] | 4.3 | 4.2
Commercial Real Estate | Loan To Value Ratio Above 65 To 75 Percent |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Financing Receivable, Allowance for Credit Loss, Beginning Balance | [1] | 1.7 | 3.8
Financing Receivable, Credit Loss, Expense (Reversal) | [1] | (1.0) | (2.1)
Financing Receivable, Allowance for Credit Loss, Writeoff | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Recovery | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance | [1] | 0.7 | 1.7
Commercial Real Estate | Loan To Value Ratio Above 75 To 85 Percent |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Financing Receivable, Allowance for Credit Loss, Beginning Balance | [1] | 2.2 | 1.2
Financing Receivable, Credit Loss, Expense (Reversal) | [1] | 0.5 | 8.0
Financing Receivable, Allowance for Credit Loss, Writeoff | [1] | (0.8) | (7.0)
Financing Receivable, Allowance for Credit Loss, Recovery | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance | [1] | 1.9 | 2.2
Commercial Real Estate | Loan To Value Ratio Above 85 Percent |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Financing Receivable, Allowance for Credit Loss, Beginning Balance | [1] | 8.0 | 1.4
Financing Receivable, Credit Loss, Expense (Reversal) | [1] | 1.0 | 6.6
Financing Receivable, Allowance for Credit Loss, Writeoff | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Recovery | [1] | 0.0 | 0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance | [1] | $ 9.0 | $ 8.0
[1] | Loan-to-Value Ratio utilizes the most recent internal valuation of the property

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (3) -Publisher SEC Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-22 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=unm_LoanToValueRatioBelowOrEqualTo65PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=unm_LoanToValueRatioAbove65To75PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=unm_LoanToValueRatioAbove75To85PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanToValueAxis=unm_LoanToValueRatioAbove85PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |