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STOCKHOLDERS' EQUITY: - Treasury Stock (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 26, 2024 | May 23, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Activity in treasury stock |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  | $ 3,149.0 |  |
Balance at the end of the period |  |  | $ 2,831.0 | $ 3,131.1 | $ 2,831.0 | $ 3,131.1 |
Dividends paid as cash dividend (in dollars per share) |  |  |  |  | $ 1.40 | $ 3.00 |
Parent Company (Grupo Mexico) common shares |  |  |  |  |  |  |
Activity in treasury stock |  |  |  |  |  |  |
Treasury stock balance at the end of the period (in shares) |  |  | 99,059,107 |  | 99,059,107 |  | 111,485,617
Dividends paid as cash dividend (in dollars per share) | $ 0.0056 | $ 0.0104 |  |  |  |  |
Reduction of shares in treasury stock | 4,374,118 | 8,039,992 |  |  |  |  |
Treasury stock retired amount | $ 108.6 | $ 199.5 |  |  |  |  |
TREASURY STOCK: |  |  |  |  |  |  |
Activity in treasury stock |  |  |  |  |  |  |
Dividend paid in Common Stock |  |  | $ 108.6 |  | $ 308.1 |  |
TREASURY STOCK: | Parent Company (Grupo Mexico) common shares |  |  |  |  |  |  |
Activity in treasury stock |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  | 2,766.7 | $ 2,766.9 |
Dividend paid in Common Stock |  |  |  |  | (308.1) |  |
Used for corporate purposes |  |  |  |  | (0.3) | (0.2) |
Balance at the end of the period |  |  | 2,458.3 | 2,766.7 | 2,458.3 | 2,766.7 |
TREASURY STOCK: | Parent Company (Grupo Mexico) |  |  |  |  |  |  |
Activity in treasury stock |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  | 382.3 | 340.7 |
Other activity, including dividend, interest and foreign currency translation effect |  |  | (6.5) | (0.6) | (9.6) | 23.7 |
Balance at the end of the period |  |  | $ 372.7 | $ 364.4 | $ 372.7 | $ 364.4 |

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