SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,354,079	1,352,739	1,351,018
Exercise of stock options and issuance of restricted shares	1,319	1,340	1,721
Balance, end of period	1,355,398	1,354,079	1,352,739
Treasury Stock, Common, Shares	776,919	738,823	700,607
Treasury Stock [Roll Forward]
Balance, beginning of period	738,823	700,607	658,564
Share repurchase program	38,896	39,187	43,327
Exercise of stock options	(526)	(560)	(896)
Balance, end of period	776,919	738,823	700,607
Shares outstanding, end of period	578,479	615,256	652,132
Treasury Stock, Common
Treasury Stock [Roll Forward]
Other purchases	364	370	437
Shares issued to AFL Stock Plan	(897)	(1,009)	(1,216)
Exercise of stock options	(88)	(117)	(275)
Other dispositions	(179)	(215)	(230)