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Mergers, Acquisitions and Disposals - Acquisition Information (Detail) $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 MXN ($) customer item | May 15, 2020 | Jan. 31, 2020 | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
Acquisition Of WAXIE Sanitary Supply And North American Corporation [Member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired | 89.50% | 89.00% |  |  |
Business acquisition, consideration transferred | $ 20,233 |  |  |  |
Number of distribution centers | item | 26 |  |  |  |
Threshold number of customers served in various industries | customer | 27,000 |  |  |  |
Southeastern Paper Group, Inc [Member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired | 100.00% |  |  |  |
Business acquisition, consideration transferred | $ 2,984 |  |  |  |
GPF [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired |  |  |  | 100.00% |
AGV [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired |  |  | 100.00% |  |
Other acquisitions [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, consideration transferred |  |  |  | $ 7,807 |
Coca-Cola FEMSA [member] | Abasa [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired |  |  |  |  | 100.00%
Coca-Cola FEMSA [member] | Los Volcanes [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired |  |  |  |  | 100.00%
Coca-Cola FEMSA [member] | MONRESA [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, percentage of voting equity interests acquired |  |  |  |  | 100.00%
Coca-Cola FEMSA [member] | Other acquisitions [member] |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Business acquisition, consideration transferred |  |  |  |  | $ 6,552

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