SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,354,079	1,352,739
Exercise of stock options and issuance of restricted shares	1,233	1,230
Balance, end of period	1,355,312	1,353,969
Treasury Stock [Roll Forward]
Balance, beginning of period	738,823	700,607
Balance, end of period	768,415	730,101
Shares outstanding, end of period	586,897	623,868
Treasury Stock
Treasury Stock [Roll Forward]
Share repurchase program	30,199	30,249
Other purchases	360	354
Shares issued to AFL Stock Plan	(707)	(787)
Exercise of stock options	(81)	(108)
Other dispositions	(179)	(214)