Insider Trading Arrangements	3 Months Ended	12 Months Ended
Dec. 31, 2023 shares	Dec. 31, 2023 shares
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		Insider Trading Arrangements During the fourth quarter of 2023, the following directors or executive officers adopted or terminated a written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c): •On November 2, 2023, Charles D. Lake II, Chairman and Representative Director of Aflac Japan and President of Aflac International, adopted a trading plan that provides for the sale of 56% of performance-based restricted stock shares to be released upon approval of the Company's board of directors and will terminate no later than May 10, 2024. The estimated number of gross shares of Aflac Incorporated common stock to be acquired is 28,682; however, the actual number of shares may vary based on achievement of designated performance metrics. •On November 3, 2023, Joseph L. Moskowitz, a member of the Company's board of directors, adopted a trading plan that provides for the sale of 2,400 shares of Aflac Incorporated common stock and will terminate no later than November 11, 2024. •On November 7, 2023, Masatoshi Koide, President and Representative Director of Aflac Japan, adopted a trading plan that provides for the sale of 50% of performance-based restricted stock shares to be released upon approval of the Company's board of directors and will terminate no later than May 10, 2024. The estimated number of gross shares of Aflac Incorporated common stock to be acquired is 30,338; however, the actual number of shares may vary based on achievement of designated performance metrics.
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Charles D. Lake II [Member]
Trading Arrangements, by Individual
Name	Charles D. Lake II
Title	Chairman and Representative Director of Aflac Japan and President of Aflac International
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	November 2, 2023
Termination Date	May 10, 2024
Aggregate Available	28,682	28,682
Joseph L. Moskowitz [Member]
Trading Arrangements, by Individual
Name	Joseph L. Moskowitz
Title	member of the Company's board of directors
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	November 3, 2023
Termination Date	November 11, 2024
Aggregate Available	2,400	2,400
Masatoshi Koide [Member]
Trading Arrangements, by Individual
Name	Masatoshi Koide
Title	President and Representative Director of Aflac Japan
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	November 7, 2023
Termination Date	May 10, 2024
Aggregate Available	30,338	30,338

Insider Trading Arrangements

3 Months Ended

12 Months Ended

Dec. 31, 2023

Insider Trading Arrangements

During the fourth quarter of 2023, the following directors or executive officers adopted or terminated a written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c):

•On November 2, 2023, Charles D. Lake II, Chairman and Representative Director of Aflac Japan and President of Aflac International, adopted a trading plan that provides for the sale of 56% of performance-based restricted stock shares to be released upon approval of the Company's board of directors and will terminate no later than May 10, 2024. The estimated number of gross shares of Aflac Incorporated common stock to be acquired is 28,682; however, the actual number of shares may vary based on achievement of designated performance metrics.

•On November 3, 2023, Joseph L. Moskowitz, a member of the Company's board of directors, adopted a trading plan that provides for the sale of 2,400 shares of Aflac Incorporated common stock and will terminate no later than November 11, 2024.

•On November 7, 2023, Masatoshi Koide, President and Representative Director of Aflac Japan, adopted a trading plan that provides for the sale of 50% of performance-based restricted stock shares to be released upon approval of the Company's board of directors and will terminate no later than May 10, 2024. The estimated number of gross shares of Aflac Incorporated common stock to be acquired is 30,338; however, the actual number of shares may vary based on achievement of designated performance metrics.

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

Charles D. Lake II [Member]

Trading Arrangements, by Individual

Name

Charles D. Lake II

Title

Chairman and Representative Director of Aflac Japan and President of Aflac International