SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,355,398	1,354,079	1,352,739
Exercise of stock options and issuance of restricted shares	1,365	1,319	1,340
Balance, end of period	1,356,763	1,355,398	1,354,079
Treasury Stock [Roll Forward]
Balance, beginning of period	776,919	738,823	700,607
Share repurchase program	30,428	38,896	39,187
Exercise of stock options	(425)	(526)	(560)
Balance, end of period	806,799	776,919	738,823
Shares outstanding, end of period	549,964	578,479	615,256
Treasury stock
Treasury Stock [Roll Forward]
Other purchases	494	364	370
Shares issued to AFL Stock Plan	(751)	(897)	(1,009)
Exercise of stock options	(104)	(88)	(117)
Other dispositions	(187)	(179)	(215)