SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Common Stock Issued [Roll Forward]
Balance, beginning of period	1,356,763	1,355,398
Exercise of stock options and issuance of restricted shares	989	1,082
Balance, end of period	1,357,752	1,356,480
Treasury Stock [Roll Forward]
Balance, beginning of period	806,799	776,919
Share repurchase program	8,497	9,276
Balance, end of period	815,259	786,202
Shares outstanding, end of period	542,493	570,278
Treasury Stock
Treasury Stock [Roll Forward]
Other purchases	398	457
Shares issued to AFL Stock Plan	(173)	(212)
Exercise of stock options	(41)	(55)
Other dispositions	(221)	(183)