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POLICY LIABILITIES - Reconciliation of Future Policy Benefits (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Deferred reinsurance gain liability |  | $ 175 | $ 692
Future policy benefits |  | 83,718 | 88,241
Segment Reconciling Items |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Deferred profit liability - limited-payment contracts |  | 1,806 | 1,740
Deferred reinsurance gain liability |  | 1,012 | 692
Intercompany eliminations |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits | [1] | (5,017) | (667)
Corporate and other | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 4,225 | 686
Cancer | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 32,652 | 35,468
Cancer | Aflac Japan | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 32,652 | 35,468
Medical and other health | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 10,560 | 10,705
Medical and other health | Aflac Japan | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 10,560 | 10,705
Life insurance | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 23,243 | 24,469
Life insurance | Aflac Japan | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 23,243 | 24,469
Life insurance | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 911 | 802
Life insurance | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 911 | 802
Accident | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 621 | 564
Accident | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 621 | 564
Disability | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 770 | 810
Disability | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 770 | 810
Critical care | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 7,216 | 7,003
Critical care | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 7,216 | 7,003
Hospital indemnity | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 836 | 854
Hospital indemnity | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 836 | 854
Dental/vision | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 272 | 277
Dental/vision | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 272 | 277
Other | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 4,090 | 4,326
Other | Aflac Japan | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 4,090 | 4,326
Other | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | 521 | 512
Other | Aflac U.S. | Operating Segments |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits |  | $ 521 | $ 512
[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 for additional details

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