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STOCKHOLDERS' EQUITY - Treasury Stock (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 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 | $ 3,157.2 | $ 3,115.1 |
Parent Company (Grupo Mexico) common shares |  |  |
Activity in treasury stock |  |  |
Treasury stock balance at the end of the period (in shares) | 111,482,817 |  | 111,485,617
TREASURY STOCK: | Parent Company (Grupo Mexico) common shares |  |  |
Activity in treasury stock |  |  |
Balance at the beginning of the period | $ 2,766.6 | 2,766.9 |
Used for corporate purposes | (0.1) | (0.1) |
Balance at the end of the period | 2,766.6 | 2,766.8 |
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 transaction effect | 8.3 | 7.6 |
Balance at the end of the period | 390.6 | $ 348.3 |
TREASURY STOCK: | Maximum | Parent Company (Grupo Mexico) common shares |  |  |
Activity in treasury stock |  |  |
Used for corporate purposes | $ 0.1 |  |

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