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Bonus Programs - Summary of Number of Shares Held by the Trust (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2021 MXN ($) | Dec. 31, 2020 MXN ($)
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Fair value of shares held by trust | $ 706 | $ 638
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 | 3,414,900 | 2,249,665
Shares acquired by the administrative trust to employees | 2,221,136 | 2,445,983
Shares released from administrative trust to employees upon vesting | 1,963,450 | 1,280,748
Number of other equity instruments outstanding in share-based payment arrangement at end of period | 3,672,586 | 3,414,900
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 | 1,360,158 | 752,847
Shares acquired by the administrative trust to employees | 921,125 | 985,535
Shares released from administrative trust to employees upon vesting | 580,209 | 378,224
Number of other equity instruments outstanding in share-based payment arrangement at end of period | 1,701,074 | 1,360,158

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