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Bonus Programs - Summary of Number of Shares Held by the Trust (Details) - shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
FEMSA UBD |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period (in shares) | 5,723,019 | 3,672,586
Shares acquired by the administrative trust to employees (in shares) | 4,844,120 | 4,256,433
Number of other equity instruments exercised or vested in share-based payment arrangement | (3,283,941) | (2,206,000)
Number of other equity instruments outstanding in share-based payment arrangement at end of period (in shares) | 7,283,198 | 5,723,019
KOFL UBL |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period (in shares) | 1,860,379 | 1,701,074
Shares acquired by the administrative trust to employees (in shares) | 1,139,180 | 1,266,283
Number of other equity instruments exercised or vested in share-based payment arrangement | (1,095,319) | (1,106,978)
Number of other equity instruments outstanding in share-based payment arrangement at end of period (in shares) | 1,904,240 | 1,860,379

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