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NOTES PAYABLE AND LEASE OBLIGATIONS - Summary of Lines of Credit (Details) - 9 months ended Sep. 30, 2025 $ in Millions, ¥ in Billions | USD ($) | JPY (¥)
--- | --- | ---
$100 million line of credit |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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 line of credit |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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, at the Company's option, either (a) Tokyo Interbank Market Rate (TIBOR) plus an applicable margin or (b) an alternative TIBOR based on the rate offered by the agent to major banks in yen for the applicable period plus an applicable margin |
$1.0 billion line of credit |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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] |  |
Debt instrument, 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 line of credit (Tranche 1) |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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 line of credit (Tranche 2) |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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 (Aflac New York as borrower) |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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] |  |
Debt instrument, 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] |  |
Debt instrument, 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] |  |
Debt instrument, 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] |  |
Debt instrument, 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] |  |
Debt instrument, 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 LLC as borrower) |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, 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] |  |
Debt instrument, 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 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] |  |
Debt instrument, term | 3 months |
Upper Limit | ¥100.0 billion 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] |  |
Debt instrument, term | 3 months |

X
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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