SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,355,398	1,354,079
Exercise of stock options and issuance of restricted shares	1,082	933
Balance, end of period	1,356,480	1,355,012
Treasury Stock [Roll Forward]
Balance, beginning of period	776,919	738,823
Share repurchase program	9,276	10,348
Balance, end of period	786,202	749,060
Shares outstanding, end of period	570,278	605,952
Treasury Stock
Treasury Stock [Roll Forward]
Other purchases	457	347
Shares issued to AFL Stock Plan	(212)	(239)
Exercise of stock options	(55)	(48)
Other dispositions	(183)	(171)