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SHAREHOLDERS' EQUITY - Reconciliation of Number of Shares of Common Stock (Detail) - shares shares in Thousands | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 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 | 1,078 | 1,294
Balance, end of period | 1,357,841 | 1,356,692
Treasury Stock [Roll Forward] |  |
Balance, beginning of period | 806,799 | 776,919
Share repurchase program | 25,744 | 23,446
Balance, end of period | 832,131 | 799,975
Shares outstanding, end of period | 525,710 | 556,717
Treasury Stock |  |
Treasury Stock [Roll Forward] |  |
Other purchases | 407 | 491
Shares issued to AFL Stock Plan | (537) | (594)
Exercise of stock options | (57) | (99)
Other dispositions | (225) | (188)

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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