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POLICY LIABILITIES - Reconciliation of Future Policy Benefits (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | $ 67,143 | $ 70,381
Deferred reinsurance gain liability |  | 148 | 146
Intercompany eliminations |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits | [1] | (5,485) | (5,760)
Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Deferred profit liability |  | 2,135 | 1,844
Deferred reinsurance gain liability |  | 834 | 806
Aflac Japan | Cancer |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 24,972 | 26,597
Aflac Japan | Medical and other health |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 8,046 | 8,789
Aflac Japan | Life insurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 17,839 | 19,109
Aflac Japan | Other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 3,223 | 3,379
Aflac U.S. | Life insurance |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 1,038 | 938
Aflac U.S. | Accident |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 671 | 630
Aflac U.S. | Disability |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 661 | 695
Aflac U.S. | Critical Care |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 6,949 | 6,800
Aflac U.S. | Hospital Indemnity |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 788 | 775
Aflac U.S. | Dental/Vision |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 240 | 245
Aflac U.S. | Other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 481 | 462
Corporate and other |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | $ 4,751 | $ 5,072
[1] | Elimination entry necessary due to the internal reinsurance transactions with Aflac Re and to recapture a portion of policy liabilities ceded externally as a result of the reinsurance retrocession transaction. See Note 8 of the Notes to the Consolidated Financial Statements in the 2024 Annual Report.

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