SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 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	1,148	1,132
Balance, end of period	1,355,227	1,353,871
Treasury Stock [Roll Forward]
Balance, beginning of period	738,823	700,607
Balance, end of period	759,258	719,345
Shares outstanding, end of period	595,969	634,526
Treasury Stock
Treasury Stock [Roll Forward]
Share repurchase program	20,809	19,192
Other purchases	354	351
Shares issued to AFL Stock Plan	(498)	(528)
Exercise of stock options	(52)	(62)
Other dispositions	(178)	(215)