v3.25.2
POLICY LIABILITIES - Reconciliation of Future Policy Benefits (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits $ 71,099 $ 70,381
Deferred reinsurance gain liability 154 146
Intercompany eliminations    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits [1] (5,884) (5,760)
Aflac Japan    
Liability for Future Policy Benefit, Activity [Line Items]    
Deferred profit liability 2,097 1,844
Deferred reinsurance gain liability 885 806
Aflac Japan | Cancer    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 26,994 26,597
Aflac Japan | Medical and other health    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 8,682 8,789
Aflac Japan | Life insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 19,145 19,109
Aflac Japan | Other    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 3,401 3,379
Aflac U.S. | Life insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 1,003 938
Aflac U.S. | Accident    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 630 630
Aflac U.S. | Disability    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 686 695
Aflac U.S. | Critical Care    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 6,875 6,800
Aflac U.S. | Hospital Indemnity    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 772 775
Aflac U.S. | Dental/Vision    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 245 245
Aflac U.S. | Other    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits 462 462
Corporate and other    
Liability for Future Policy Benefit, Activity [Line Items]    
Future policy benefits $ 5,106 $ 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.