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POLICY LIABILITIES - Summary of Discounted Expected Future Gross Premiums and Future Benefits and Expenses (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | $ 134,041 | $ 132,451
Benefits and Expenses | 145,078 | 141,463
Cancer | Aflac Japan |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 53,806 | 53,278
Benefits and Expenses | 55,799 | 54,766
Medical and other health | Aflac Japan |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 35,030 | 34,693
Benefits and Expenses | 28,439 | 27,419
Life insurance | Aflac Japan |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 12,875 | 12,951
Benefits and Expenses | 32,714 | 31,954
Life insurance | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 1,756 | 1,663
Benefits and Expenses | 1,606 | 1,526
Accident | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 6,625 | 6,510
Benefits and Expenses | 3,149 | 3,098
Disability | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 4,554 | 4,468
Benefits and Expenses | 2,495 | 2,445
Critical Care | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 13,013 | 12,659
Benefits and Expenses | 11,817 | 11,489
Hospital Indemnity | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 3,592 | 3,483
Benefits and Expenses | 2,139 | 2,074
Dental/Vision | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 826 | 821
Benefits and Expenses | 494 | 488
Other | Aflac Japan |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 1,712 | 1,697
Benefits and Expenses | 5,770 | 5,582
Other | Aflac U.S. |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Gross Premiums | 252 | 228
Benefits and Expenses | $ 656 | $ 622

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount, before effect of reinsurance, of discounted balance for expected future gross premium component of liability for future policy benefit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 + Details
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