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NOTES PAYABLE AND LEASE OBLIGATIONS - Summary of Lines of Credit (Detail) - 12 months ended Dec. 31, 2024 $ in Millions, ¥ in Billions | USD ($) | JPY (¥)
--- | --- | ---
$100 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 100.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | The rate quoted by the bank and agreed upon at the time of borrowing |
100.0 billion yen line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 5 years |
Line of credit facility, maximum borrowing capacity | ¥ |  | ¥ 100.0
Line of credit facility, amount outstanding | ¥ |  | 0.0
Line of credit facility, interest rate description | A rate per annum equal to (a) Tokyo Interbank Market Rate (TIBOR) plus, the alternative applicable TIBOR margin during the availability period from the closing date to the commitment termination date or (b) the TIBOR rate offered by the agent to major banks in yen for the applicable period plus, the applicable alternative TIBOR margin during the term out period |
$1.0 billion line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 5 years |
Line of credit facility, maximum borrowing capacity | $ 1,000.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | A rate per annum equal to, at the Company's option, either, (a) Secured Overnight Financing Rate (SOFR) for U.S. dollar-denominated borrowings or TIBOR for Japanese yen-denominated borrowings, in either case adjusted for certain costs, or (b) a base rate determined by reference to the highest of (1) the federal funds rate plus 1/2 of 1%, (2) the rate of interest for such day announced by the agent as its prime rate, or (3) SOFR for an interest period of one month plus 1.00%, in each case plus an applicable margin |
$50 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, maximum borrowing capacity | $ 50.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | A rate per annum equal to, at the Parent Company's option, either (a) a rate determined by reference to SOFR for the interest period relevant to such borrowing or (b) the base rate determined by reference to the highest of (1) the lender's USD short-term commercial loan rate and (2) the federal funds rate plus 1/2 of 1% |
$250 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 250.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum |
50.0 billion yen line of credit (Tranche 1) |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | ¥ |  | 50.0
Line of credit facility, amount outstanding | ¥ |  | 0.0
Line of credit facility, interest rate description | Three-month yen TIBOR plus 75 basis points per annum |
50.0 billion yen line of credit (Tranche 2) |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | ¥ |  | 50.0
Line of credit facility, amount outstanding | ¥ |  | ¥ 0.0
Line of credit facility, interest rate description | Three-month yen TIBOR plus 75 basis points per annum |
$25 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 25.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum |
$15 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 15.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum |
$300 thousand line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 0.3 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum |
$30 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 30.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum |
$400 million line of credit (Aflac Incorporated as borrower) |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 400.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 97 basis points per annum for U.S. dollar-denominated borrowings or three-month TIBOR plus 97 basis points per annum for Japanese yen-denominated borrowings |
$400 million line of credit (Aflac Re Bermuda Ltd. as borrower) |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 400.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 68 basis points per annum for U.S. dollar-denominated borrowings or three-month TIBOR plus 68 basis points per annum for Japanese yen-denominated borrowings |
$25 million line of credit (Aflac Asset Management as Borrower) |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 25.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 68 basis points per annum for U.S. dollar-denominated borrowings or three-month TIBOR plus 68 basis points per annum for Japanese yen-denominated borrowings |
$2 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 364 days |
Line of credit facility, maximum borrowing capacity | $ 2.0 |
Line of credit facility, amount outstanding | $ 0.0 |
Line of credit facility, interest rate description | Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 68 basis points per annum for U.S. dollar-denominated borrowings or three-month TIBOR plus 68 basis points per annum for Japanese yen-denominated borrowings |
Lower Limit | 100.0 billion yen line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, commitment fee percentage | 0.28% |
Lower Limit | $1.0 billion line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, commitment fee percentage | 0.08% |
Upper Limit | $100 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 3 months |
Upper Limit | 100.0 billion yen line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, commitment fee percentage | 0.45% |
Upper Limit | $1.0 billion line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, commitment fee percentage | 0.20% |
Upper Limit | $50 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility, term | 3 months |

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