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BUSINESS SEGMENT INFORMATION - Operations by Segment - Pretax Earnings (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Segment Reporting, Reconciling Item for Adjusted Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total revenues |  | $ 4,160 | $ 5,138 | $ 7,558 | $ 10,575 |
Benefits and claims, excluding reserve remeasurement |  | 2,047 | 1,972 | 4,033 | 4,039 |
Reserve remeasurement (gains) losses |  | (37) | (51) | (78) | (107) |
Total benefits and claims, net |  | 2,010 | 1,921 | 3,955 | 3,932 |
Amortization of deferred policy acquisition costs |  | 221 | 208 | 437 | 424 | $ 851
Insurance commissions |  | 251 | 246 | 491 | 501 |
Insurance and other expenses |  | 804 | 694 | 1,606 | 1,431 |
Total benefits and expenses |  | 3,338 | 3,119 | 6,591 | 6,385 |
Net investment gains (losses) |  | (421) | 696 | (1,384) | 1,647 |
Earnings before income taxes |  | 822 | 2,019 | 967 | 4,190 |
Income taxes applicable to pretax adjusted earnings |  | 241 | 235 | 458 | 438 |
Effect of foreign currency translation on after-tax adjusted earnings |  | 23 | (37) | 15 | (81) |
Remeasurement gain (loss), deferred profit liability for limited-payment contracts |  |  | (2) |  | (5) |
Change in value of federal historic rehabilitation and solar tax credit investments |  | (8) | (30) | (16) | (62) |
Federal historic rehabilitation and solar tax credits, amount |  | 9 | 31 | 16 | 64 |
Operating Segments |  |  |  |  |  |
Segment Reporting, Reconciling Item for Adjusted Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total revenues |  | 4,536 | 4,380 | 8,855 | 8,800 |
Total benefits and expenses |  | 3,338 | 3,110 | 6,534 | 6,366 |
Pretax adjusted earnings |  | 1,198 | 1,270 | 2,321 | 2,434 |
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment |  |  |  |  |  |
Segment Reporting, Reconciling Item for Adjusted Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Other income (loss) |  | 0 | 0 | (53) | (2) |
Net investment gains (losses) |  | (421) | 696 | (1,384) | 1,647 |
Amortized hedge costs |  | 11 | 7 | 18 | 13 |
Amortized hedge income |  | (30) | (34) | (60) | (62) |
Net interest (income) expense from derivatives associated with certain investment strategies |  | 64 | 89 | 129 | 177 |
Impact of interest from derivatives associated with notes payable |  | 0 | (9) | (4) | (17) |
Aflac Japan | Operating Segments |  |  |  |  |  |
Segment Reporting, Reconciling Item for Adjusted Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total revenues | [1] | 2,472 | 2,447 | 4,744 | 4,919 |
Benefits and claims, excluding reserve remeasurement |  | 1,186 | 1,174 | 2,316 | 2,417 |
Reserve remeasurement (gains) losses |  | (14) | (26) | (39) | (52) |
Total benefits and claims, net |  | 1,172 | 1,148 | 2,277 | 2,365 |
Amortization of deferred policy acquisition costs |  | 85 | 77 | 164 | 160 |
Insurance commissions |  | 112 | 105 | 217 | 220 |
Insurance and other expenses |  | 313 | 253 | 574 | 500 |
Total benefits and expenses |  | 1,682 | 1,583 | 3,232 | 3,245 |
Pretax adjusted earnings | [1] | 790 | 864 | 1,512 | 1,674 |
Aflac U.S. | Operating Segments |  |  |  |  |  |
Segment Reporting, Reconciling Item for Adjusted Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total revenues |  | 1,728 | 1,684 | 3,449 | 3,384 |
Benefits and claims, excluding reserve remeasurement |  | 736 | 704 | 1,467 | 1,419 |
Reserve remeasurement (gains) losses |  | (24) | (24) | (39) | (54) |
Total benefits and claims, net |  | 712 | 680 | 1,428 | 1,365 |
Amortization of deferred policy acquisition costs |  | 136 | 132 | 273 | 264 |
Insurance commissions |  | 139 | 140 | 274 | 281 |
Insurance and other expenses |  | 353 | 349 | 728 | 735 |
Total benefits and expenses |  | 1,340 | 1,301 | 2,703 | 2,645 |
Pretax adjusted earnings |  | 388 | 383 | 746 | 739 |
Corporate and other | Operating Segments |  |  |  |  |  |
Segment Reporting, Reconciling Item for Adjusted Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total revenues | [2] | 336 | 249 | 662 | 497 |
Total benefits and expenses |  | 316 | 226 | 599 | 476 |
Pretax adjusted earnings | [2] | $ 20 | $ 23 | $ 63 | $ 21 |
[1] | Includes a gain (loss) of an immaterial amount and $(2) for the three-month periods and an immaterial amount and $(5) for the six-month periods ended June 30, 2025 and 2024, 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 $8 and $30 for the three-month periods and $16 and $62 for the six-month periods ended June 30, 2025, and 2024, respectively, is included as a reduction to net investment income. Tax credits on these investments of $9 and $31 for the three-month periods and $16 and $64 for the six-month periods ended June 30, 2025, and 2024, respectively, have been recorded as an income tax benefit in the consolidated statements of earnings. See Note 3 for additional information on these investments.

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