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Bonus Programs - Summary of Shares Granted Under the Company's Executive Incentive Plans (Detail) - shares | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 0 | 0 | 0
FEMSA |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 3,876,340,000,000 |  |
FEMSA | 2020 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 666,281,000,000 |  |
FEMSA | 2021 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 780,524,000,000 |  |
FEMSA | 2022 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 856,664,000,000 |  |
FEMSA | 2023 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 926,288,000,000 |  |
FEMSA | 2024 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 646,583,000,000 |  |
KOF |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 5,467,272,000,000 |  |
KOF | 2020 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 956,926,000,000 |  |
KOF | 2021 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 1,197,820,000,000 |  |
KOF | 2022 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 1,289,204,000,000 |  |
KOF | 2023 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 1,134,810,000,000 |  |
KOF | 2024 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement | 888,512,000,000 |  |

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