SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,352,739	1,351,018
Exercise of stock options and issuance of restricted shares	1,132	1,374
Balance, end of period	1,353,871	1,352,392
Treasury Stock [Roll Forward]
Balance, beginning of period	700,607	658,564
Balance, end of period	719,345	680,402
Shares outstanding, end of period	634,526	671,990
Treasury Stock
Treasury Stock [Roll Forward]
Stock acquired under share repurchase program, shares	19,192	22,614
Other purchases	351	381
Shares issued to AFL Stock Plan	(528)	(717)
Exercise of stock options	(62)	(223)
Other dispositions	(215)	(217)