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DEFERRED POLICY ACQUISITION COSTS AND INSURANCE EXPENSES - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Policy Acquisition Costs Disclosures [Abstract] |  |  |
Commissions deferred as a percentage of total acquisition costs | 67.00% | 68.00% | 71.00%
Personnel, compensation and benefit expenses as a percentage of insurance expenses | 61.00% | 60.00% | 57.00%

X
- Definition Percentage of Deferred Policy Acquisition Costs Attributable to Commissions Deferred + References No definition available. + Details
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Namespace Prefix: | afl_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of Insurance Expenses Attributable to Personnel, Compensation, and Benefit Expenses + References No definition available. + Details
Name: | afl_PercentageOfInsuranceExpensesAttributableToPersonnelCompensationAndBenefitExpenses
Namespace Prefix: | afl_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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