v3.26.1
BUSINESS SEGMENT INFORMATION - Operations by Segment - Revenues (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Net earned premiums [1] $ 3,252 $ 3,470 $ 6,562 $ 6,851
Net investment income 984 1,081 1,940 2,036
Other income 34 30 65 55
Total revenues 4,117 4,160 8,463 7,558
Net investment gains (losses) (153) (421) (104) (1,384)
Change in value of federal historic rehabilitation and solar tax credit investments (6) (8) (11) (16)
Federal historic rehabilitation and solar tax credits, amount 5 9 10 16
Operating Segments        
Segment Reporting [Line Items]        
Total revenues 4,223 4,536 8,466 8,855
Segment Reconciling Items        
Segment Reporting [Line Items]        
Net investment gains (losses) (153) (421) (104) (1,384)
Amortized hedge costs 12 11 27 18
Amortized hedge income (19) (30) (37) (60)
Net interest (income) expense from derivatives associated with certain investment strategies 54 64 111 129
Aflac Japan | Operating Segments        
Segment Reporting [Line Items]        
Net earned premiums [1] 1,537 1,761 3,110 3,442
Net investment income 616 699 1,207 1,285
Other income 8 12 16 17
Total revenues [1] 2,161 2,472 4,333 4,744
Aflac U.S. | Operating Segments        
Segment Reporting [Line Items]        
Net earned premiums 1,539 1,504 3,094 3,006
Net investment income 208 207 409 409
Other income 24 17 47 34
Total revenues 1,771 1,728 3,550 3,449
Corporate and other | Operating Segments        
Segment Reporting [Line Items]        
Total revenues [2] $ 291 $ 336 $ 583 $ 662
[1] Includes a gain (loss) of an immaterial amount for the three- and six-month periods ended June 30, 2026 and 2025, respectively, related to remeasurement of the deferred profit liability for limited-payment contracts.
[2] The change in value of federal historic rehabilitation and solar investments in partnerships of $6 and $8 for the three-month periods and $11 and $16 for the six-month periods ended June 30, 2026 and 2025, respectively, is included as a reduction to net investment income. Tax credits on these investments of $5 and $9 for the three-month periods and $10 and $16 for the six-month periods ended June 30, 2026 and 2025, respectively, have been reported as an income tax benefit in the consolidated statements of earnings. See Note 1 of the Notes to the Consolidated Financial Statements in the 2025 Annual Report for additional information on these investments.