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STOCKHOLDERS' EQUITY: - Directors Stock Award Plan (Details) - shares |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | ---
May 27, 2022 | Apr. 26, 2018 | Apr. 25, 2018 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Parent Company (Grupo Mexico) |  |  |  |  |  |
Activity in directors' stock award plan |  |  |  |  |  |
Treasury stock balance at the end of the period (in shares) |  |  |  | 67,798,524 |  | 79,728,356
Directors' Stock Award Plan |  |  |  |  |  |
Share based Compensation Plan |  |  |  |  |  |
Common shares received on election as director |  |  |  | 1,200 |  |
Additional shares issued at each annual general meeting |  |  | 1,200 | 1,200 |  |
Total SCC shares reserved for the plan |  |  |  | 600,000 | 600,000 |
Period of extension of plan | 5 years | 5 years |  |  |  |
Increased share awards issued to directors |  | 1,600 |  |  |  |
Numbers of shares shall be granted quarterly and conditioned upon the attendance of each director to each Board meeting |  |  |  | 1,600 |  |
Activity in directors' stock award plan |  |  |  |  |  |
Total shares granted at the beginning of the period (in shares) |  |  |  | (416,800) | (405,200) |
Granted (in shares) |  |  |  | (9,600) | (8,800) |
Total shares granted at the end of the period (in shares) |  |  |  | (426,400) | (414,000) |
Remaining shares reserved |  |  |  | 173,600 | 186,000 |

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