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POLICY LIABILITIES - Summary of Net Earned Premiums Recognized (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | $ 3,325 | $ 3,573 | $ 6,781 | $ 7,262
Reinsurance ceded | (66) | (103) | (135) | (210)
Corporate and other |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 155 | 84 | 320 | 175
Cancer | Aflac Japan |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 832 | 1,054 | 1,710 | 2,149
Medical and other health | Aflac Japan |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 570 | 672 | 1,175 | 1,377
Life insurance | Aflac Japan |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 316 | 390 | 655 | 812
Life insurance | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 141 | 115 | 279 | 228
Accident | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 316 | 322 | 641 | 652
Disability | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 332 | 318 | 665 | 627
Critical Care | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 441 | 439 | 885 | 882
Hospital Indemnity | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 182 | 182 | 367 | 367
Dental/Vision | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 46 | 53 | 105 | 107
Other | Aflac Japan |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | 35 | 38 | 69 | 77
Other | Aflac U.S. |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Net earned premiums | $ 25 | $ 9 | $ 45 | $ 19

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