SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,352,739	1,351,018	1,349,309
Exercise of stock options and issuance of restricted shares	1,340	1,721	1,709
Balance, end of period	1,354,079	1,352,739	1,351,018
Treasury Stock [Roll Forward]
Balance, beginning of period	700,607	658,564	622,516
Share repurchase program	39,187	43,327	37,899
Exercise of stock options	(560)	(896)	(638)
Balance, end of period	738,823	700,607	658,564
Shares outstanding, end of period	615,256	652,132	692,454
Treasury Stock
Treasury Stock [Roll Forward]
Other purchases	370	437	542
Shares issued to AFL Stock Plan	(1,009)	(1,216)	(2,021)
Exercise of stock options	(117)	(275)	(121)
Other dispositions	(215)	(230)	(251)