XML 82 R71.htm IDEA: XBRL DOCUMENT
v3.25.2

FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Carried at Cost or Amortized Cost (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other investments |  | $ 7,345 |  | $ 5,958 |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, amortized cost |  | 17,439 |  | 15,971 |
Fixed maturity securities, held-to-maturity, fair value |  | 17,607 |  | 16,772 |
Commercial mortgage and other loans |  | 10,264 |  | 10,869 |
Commercial mortgage and other loans, fair value |  | 10,099 |  | 10,653 |
Other investments carried at amortized cost |  | 40 | [1] | 39 | [2]
Other investments carried at amortized cost, fair value |  | 40 | [1] | 39 | [2]
Total financial instruments assets not carried at fair value |  | 27,738 |  | 26,874 |
Assets fair value disclosure financial instruments carried at cost |  | 27,746 |  | 27,464 |
Liabilities: |  |  |  |  |
Other policyholders’ funds |  | 6,002 |  | 5,460 |
Other policyholders' funds fair value disclosure |  | 5,925 |  | 5,389 |
Notes payable |  | 8,837 |  | 7,402 |
Notes payable, fair value disclosure |  | 8,415 |  | 7,027 |
Total financial instrument liabilities not carried at fair value |  | 14,839 |  | 12,862 |
Liabilities fair value disclosure financial instruments carried at cost |  | 14,340 |  | 12,416 |
Government and agencies |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, amortized cost |  | 16,718 |  | 15,309 |
Fixed maturity securities, held-to-maturity, fair value |  | 16,860 |  | 16,059 |
Municipalities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, amortized cost |  | 255 |  | 235 |
Fixed maturity securities, held-to-maturity, fair value |  | 265 |  | 257 |
Public utilities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, amortized cost |  | 35 |  | 32 |
Fixed maturity securities, held-to-maturity, fair value |  | 34 |  | 33 |
Sovereign and supranational |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, amortized cost |  | 409 |  | 374 |
Fixed maturity securities, held-to-maturity, fair value |  | 430 |  | 405 |
Other corporate |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, amortized cost |  | 17 |  | 16 |
Fixed maturity securities, held-to-maturity, fair value |  | 18 |  | 18 |
Policy loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other investments |  | 221 |  | 203 |
Equity method investments |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other investments | [3] | 3,745 |  | 3,435 |
Real estate owned |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other investments |  | 964 |  | 682 |
Level 1 |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 16,711 |  | 15,916 |
Commercial mortgage and other loans, fair value |  | 0 |  | 0 |
Other investments carried at amortized cost, fair value |  | 0 | [1] | 0 | [2]
Assets fair value disclosure financial instruments carried at cost |  | 16,711 |  | 15,916 |
Liabilities: |  |  |  |  |
Other policyholders' funds fair value disclosure |  | 0 |  | 0 |
Notes payable, fair value disclosure |  | 0 |  | 0 |
Liabilities fair value disclosure financial instruments carried at cost |  | 0 |  | 0 |
Level 1 | Government and agencies |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 16,711 |  | 15,916 |
Level 1 | Municipalities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 1 | Public utilities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 1 | Sovereign and supranational |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 1 | Other corporate |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 2 |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 896 |  | 856 |
Commercial mortgage and other loans, fair value |  | 0 |  | 0 |
Other investments carried at amortized cost, fair value |  | 40 | [1] | 39 | [2]
Assets fair value disclosure financial instruments carried at cost |  | 936 |  | 895 |
Liabilities: |  |  |  |  |
Other policyholders' funds fair value disclosure |  | 0 |  | 0 |
Notes payable, fair value disclosure |  | 7,678 |  | 6,352 |
Liabilities fair value disclosure financial instruments carried at cost |  | 7,678 |  | 6,352 |
Level 2 | Government and agencies |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 149 |  | 143 |
Level 2 | Municipalities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 265 |  | 257 |
Level 2 | Public utilities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 34 |  | 33 |
Level 2 | Sovereign and supranational |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 430 |  | 405 |
Level 2 | Other corporate |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 18 |  | 18 |
Level 3 |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Commercial mortgage and other loans, fair value |  | 10,099 |  | 10,653 |
Other investments carried at amortized cost, fair value |  | 0 | [1] | 0 | [2]
Assets fair value disclosure financial instruments carried at cost |  | 10,099 |  | 10,653 |
Liabilities: |  |  |  |  |
Other policyholders' funds fair value disclosure |  | 5,925 |  | 5,389 |
Notes payable, fair value disclosure |  | 737 |  | 675 |
Liabilities fair value disclosure financial instruments carried at cost |  | 6,662 |  | 6,064 |
Level 3 | Government and agencies |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 3 | Municipalities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 3 | Public utilities |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 3 | Sovereign and supranational |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | 0 |  | 0 |
Level 3 | Other corporate |  |  |  |  |
Assets: |  |  |  |  |
Fixed maturity securities, held-to-maturity, fair value |  | $ 0 |  | $ 0 |
[1] | Excludes policy loans of $221, equity method investments of $3,745, and REO of $964, at carrying valu e
[2] | Excludes policy loans of $203, equity method investments of $3,435, and REO of $682, at carrying value
[3] | Includes tax credit investments and asset classes such as private equity and real estate funds

X
- Definition This element represents assets reported on the balance sheet that are carried at cost or amortized cost but for which fair value is disclosed. + References No definition available. + Details
Name: | afl_AssetsFairValueDisclosureFinancialInstrumentsCarriedatCost
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents liabilities reported on the balance sheet that are carried at cost or amortized cost but for which fair value is disclosed. + References No definition available. + Details
Name: | afl_LiabilitiesFairValueDisclosureFinancialInstrumentsCarriedAtCost
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other Investments Carried at Amortized Cost + References No definition available. + Details
Name: | afl_OtherInvestmentsCarriedatAmortizedCost
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other Investments Carried at Amortized Cost, Fair Value Disclosure + References No definition available. + Details
Name: | afl_OtherInvestmentsCarriedatAmortizedCostFairValueDisclosure
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other policyholders' funds fair value disclosure + References No definition available. + Details
Name: | afl_OtherPolicyholdersFundsFairValueDisclosure
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total Financial Instrument Assets Not Carried at Fair Value + References No definition available. + Details
Name: | afl_TotalFinancialInstrumentAssetsNotCarriedatFairValue
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total Financial Instrument Liabilities Not Carried At Fair Value + References No definition available. + Details
Name: | afl_TotalFinancialInstrumentLiabilitiesNotCarriedAtFairValue
Namespace Prefix: | afl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 + Details
Name: | us-gaap_HeldToMaturitySecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
Name: | us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 + Details
Name: | us-gaap_LoansReceivableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_NotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of notes payable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_NotesPayableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(5)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(3)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_OtherInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount due to policyholders for funds held that are returnable under the terms of insurance contracts, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(14)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_OtherPolicyholderFunds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_RealEstateMember
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: |