SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 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	933	1,041
Balance, end of period	1,355,012	1,353,780
Treasury Stock [Roll Forward]
Balance, beginning of period	738,823	700,607
Balance, end of period	749,060	708,431
Shares outstanding, end of period	605,952	645,349
Treasury Stock, Common
Treasury Stock [Roll Forward]
Stock acquired under share repurchase program, shares	10,348	8,007
Other purchases	347	343
Shares issued to AFL Stock Plan	(239)	(259)
Exercise of stock options	(48)	(58)
Other dispositions	(171)	(209)