NOTES PAYABLE AND LEASE OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

A summary of notes payable and lease obligations as of December 31 follows:

(In millions)	2025			2024
1.125% senior sustainability notes due March 2026		$	400		$	399
2.875% senior notes due October 2026		299			299
3.60% senior notes due April 2030		995			994
6.90% senior notes due December 2039		221			221
6.45% senior notes due August 2040		255			255
4.00% senior notes due October 2046		394			394
4.750% senior notes due January 2049		542			542
Yen-denominated senior notes and subordinated debentures:
.300% senior notes paid September 2025 (principal amount ¥12.4 billion)		0			79
.932% senior notes due January 2027 (principal amount ¥60.0 billion)		382			378
1.048% senior notes due March 2029 (principal amount ¥13.0 billion)		83			81
1.075% senior notes due September 2029 (principal amount ¥33.4 billion)		213			211
.500% senior notes due December 2029 (principal amount ¥12.6 billion)		80			79
.550% senior notes due March 2030 (principal amount ¥13.3 billion)		85			84
1.159% senior notes due October 2030 (principal amount ¥29.3 billion)		186			184
1.726% senior notes due October 2030 (principal amount ¥35.0 billion)		223			0
1.412% senior notes due March 2031 (principal amount ¥27.9 billion)		178			176
.633% senior notes due April 2031 (principal amount ¥30.0 billion)		191			189
.843% senior notes due December 2031 (principal amount ¥9.3 billion)		59			58
.750% senior notes due March 2032 (principal amount ¥20.7 billion)		131			130
1.990% senior notes due May 2032 (principal amount ¥18.2 billion)		116			0
1.320% senior notes due December 2032 (principal amount ¥21.1 billion)		134			133
2.003% senior notes due December 2032 (principal amount ¥23.4 billion)		149			0
.844% senior notes due April 2033 (principal amount ¥12.0 billion)		76			76
1.488% senior notes due October 2033 (principal amount ¥15.2 billion)		97			95
1.682% senior notes due March 2034 (principal amount ¥7.7 billion)		49			48
1.600% senior notes due March 2034 (principal amount ¥18.3 billion)		116			115
.934% senior notes due December 2034 (principal amount ¥9.8 billion)		62			62
.830% senior notes due March 2035 (principal amount ¥10.6 billion)		67			66
2.320% senior notes due May 2035 (principal amount ¥38.3 billion)		245			0
2.369% senior notes due June 2035 (principal amount ¥9.5 billion)		60			0
1.740% senior notes due March 2036 (principal amount ¥15.0 billion)		95			94
1.039% senior notes due April 2036 (principal amount ¥10.0 billion)		64			63
1.594% senior notes due September 2037 (principal amount ¥6.5 billion)		41			41
1.750% senior notes due October 2038 (principal amount ¥8.9 billion)		56			56
1.920% senior notes due March 2039 (principal amount ¥16.5 billion)		104			103
1.122% senior notes due December 2039 (principal amount ¥6.3 billion)		40			39
2.650% senior notes due May 2040 (principal amount ¥11.6 billion)		74			0
2.779% senior notes due June 2040 (principal amount ¥7.0 billion)		45			0
1.264% senior notes due April 2041 (principal amount ¥10.0 billion)		63			63
2.160% senior notes due March 2044 (principal amount ¥5.7 billion)		36			35
3.040% senior notes due May 2045 (principal amount ¥7.0 billion)		45			0
2.108% subordinated debentures due October 2047 (principal amount ¥60.0 billion)		379			375
1.560% senior notes due April 2051 (principal amount ¥20.0 billion)		127			125
2.144% senior notes due September 2052 (principal amount ¥12.0 billion)		76			75
1.958% subordinated bonds due December 2053 (principal amount ¥30.0 billion)		191			188
2.400% senior notes due March 2054 (principal amount ¥19.5 billion)		124			122
Yen-denominated loans:
Variable interest rate loan due August 2027 (1.08% in 2025 and .84% in 2024,   principal amount ¥11.7 billion)		75			74
Variable interest rate loan due August 2029 (1.18% in 2025 and .94% in 2024,   principal amount ¥25.3 billion)		161			160
Variable interest rate loan due August 2032 (1.33% in 2025 and 1.09% in 2024,   principal amount ¥70.0 billion)		446			441
Finance lease obligations payable through 2030		6			5
Operating lease obligations payable through 2049		73			91
Total notes payable and lease obligations		$	8,409		$	7,498

Amounts in the table above are reported net of debt issuance costs and issuance premiums or discounts, if applicable, that are being amortized over the life of the notes.

Schedule of Maturities of Long-term Debt

The aggregate contractual maturities of notes payable during each of the years after December 31, 2025, are as follows:

(In millions)
2026	$	700
2027	458
2028	0
2029	539
2030	1,496
Thereafter	5,185
Total	$	8,378

Schedule of Line of Credit Facilities

A summary of the Company's lines of credit as of December 31, 2025 follows:

Borrower(s)	Type	Term	Expiration Date	Capacity	Amount Outstanding	Interest Rate on Borrowed Amount	Maturity Period	Commitment Fee	Business Purpose
Aflac Incorporated and Aflac	uncommitted bilateral	364 days	December 4, 2026	$100 million	$0 million	The rate quoted by the bank and agreed upon at the time of borrowing	Up to 3 months	None	General corporate purposes
Aflac Incorporated	unsecured revolving	5 years	May 13, 2030, or the date commitments are terminated pursuant to an event of default	¥100.0 billion	¥0.0 billion	A rate per annum equal to, at the Company's option, either (a) 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	No later than May 14, 2030	.28% to .45%, depending on the Parent Company's debt ratings as of the date of determination	General corporate purposes, including a capital contingency plan for the operations of the Parent Company
Aflac Incorporated and Aflac	unsecured revolving	5 years	November 15, 2027, or the date commitments are terminated pursuant to an event of default	$1.0 billion	$0.0 billion	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	No later than November 15, 2027	.08% to .20%, depending on the Parent Company's debt ratings as of the date of determination	General corporate purposes, including a capital contingency plan for the operations of the Parent Company
Aflac Incorporated and Aflac	uncommitted bilateral	None specified	None specified	$50 million	$0 million	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 U.S. dollar short-term commercial loan rate and (2) the federal funds rate plus 1/2 of 1%	Up to 3 months	None	General corporate purposes
Aflac(1)	uncommitted revolving	364 days	November 30, 2026	$250 million	$0 million	Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum	No later than December 1, 2026	None	General corporate purposes
Aflac Incorporated(1) (Tranche 1)	uncommitted revolving	364 days	November 25, 2026	¥50.0 billion	¥0.0 billion	Three-month Japanese yen TIBOR plus 75 basis points per annum	No later than November 27, 2026	None	General corporate purposes
Aflac Incorporated(1) (Tranche 2)	uncommitted revolving	364 days	November 25, 2026	¥50.0 billion	¥0.0 billion	Three-month Japanese yen TIBOR plus 75 basis points per annum	No later than November 27, 2026	None	General corporate purposes
Aflac New York(1)	uncommitted revolving	364 days	December 1, 2026	$25 million	$0 million	Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum	No later than December 2, 2026	None	General corporate purposes
CAIC(1)	uncommitted revolving	364 days	December 1, 2026	$15 million	$0 million	Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum	No later than December 2, 2026	None	General corporate purposes

(1) Intercompany credit agreement

(continued)

Borrower(s)	Type	Term	Expiration Date	Capacity	Amount Outstanding	Interest Rate on Borrowed Amount	Maturity Period	Commitment Fee	Business Purpose
TOIC(1)	uncommitted revolving	364 days	December 1, 2026	$0.3 million	$0 million	Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum	No later than December 2, 2026	None	General corporate purposes
Aflac GI Holdings LLC(1)	uncommitted revolving	364 days	December 1, 2026	$30 million	$0 million	Three-month term SOFR plus a 10 basis point SOFR adjustment and an additional 75 basis points per annum	No later than December 2, 2026	None	General corporate purposes
Aflac Incorporated(1)	uncommitted revolving	364 days	December 1, 2026	$400 million	$0 million	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	No later than December 2, 2026	None	General corporate purposes
Aflac Re(1)	uncommitted revolving	364 days	December 1, 2026	$400 million	$0 million	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	No later than December 2, 2026	None	General corporate purposes
Aflac Asset Management LLC(1)	uncommitted revolving	364 days	December 1, 2026	$25 million	$0 million	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	No later than December 2, 2026	None	General corporate purposes
Aflac Global Ventures LLC(1)	uncommitted revolving	364 days	December 1, 2026	$2 million	$0 million	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	No later than December 2, 2026	None	General corporate purposes

(1) Intercompany credit agreement