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POLICY LIABILITIES - Schedule of Weighted-Average Interest Rate and Liability for Future Policy Benefit (Details) | Jun. 30, 2024 | Dec. 31, 2023
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Cancer | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 3.90% | 3.90%
Weighted-average interest, current discount rate | [1] | 2.20% | 1.80%
Weighted-average liability duration |  | 13 years | 13 years 1 month 6 days
Medical and other health | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 2.50% | 2.60%
Weighted-average interest, current discount rate | [1] | 2.70% | 2.30%
Weighted-average liability duration |  | 24 years 4 months 24 days | 24 years 10 months 24 days
Life insurance | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 2.10% | 2.10%
Weighted-average interest, current discount rate | [1] | 2.00% | 1.70%
Weighted-average liability duration |  | 16 years 1 month 6 days | 16 years 3 months 18 days
Life insurance | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 3.80% | 3.70%
Weighted-average interest, current discount rate | [1] | 5.40% | 5.30%
Weighted-average liability duration |  | 13 years 8 months 12 days | 13 years 7 months 6 days
Accident | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 3.90% | 3.90%
Weighted-average interest, current discount rate | [1] | 5.40% | 5.30%
Weighted-average liability duration |  | 8 years | 8 years 1 month 6 days
Disability | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 4.30% | 4.20%
Weighted-average interest, current discount rate | [1] | 5.30% | 5.30%
Weighted-average liability duration |  | 5 years 7 months 6 days | 5 years 7 months 6 days
Critical Care | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 4.50% | 4.60%
Weighted-average interest, current discount rate | [1] | 5.40% | 5.30%
Weighted-average liability duration |  | 11 years 2 months 12 days | 11 years 3 months 18 days
Hospital Indemnity | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 4.50% | 4.40%
Weighted-average interest, current discount rate | [1] | 5.40% | 5.30%
Weighted-average liability duration |  | 9 years 2 months 12 days | 9 years 3 months 18 days
Dental/Vision | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 4.30% | 4.30%
Weighted-average interest, current discount rate | [1] | 5.40% | 5.30%
Weighted-average liability duration |  | 7 years 9 months 18 days | 7 years 10 months 24 days
Other | Aflac Japan |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 1.80% | 1.80%
Weighted-average interest, current discount rate | [1] | 2.40% | 2.10%
Weighted-average liability duration |  | 17 years | 17 years 3 months 18 days
Other | Aflac U.S. |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Weighted-average interest, original discount rate | [1] | 5.40% | 5.40%
Weighted-average interest, current discount rate | [1] | 5.40% | 5.30%
Weighted-average liability duration |  | 9 years 1 month 6 days | 9 years 4 months 24 days
[1] | The weighted-average interest rates are calculated using the reserve balances as the weights. No adjustments were made to observable market information.

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