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Intangible Assets - Carrying Amounts of Goodwill and Distribution Rights (Detail) $ in Millions, $ in Millions | Dec. 31, 2020 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
--- | --- | --- | --- | ---
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated | $ 7,817 | $ 155,501 | $ 146,562 | $ 145,610
Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 100,082 | 107,088 |
Mexico [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 56,352 | 56,352 |
Guatemala [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 1,755 | 1,679 |
Nicaragua [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 433 | 420 |
Costa Rica [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 1,425 | 1,442 |
Panama [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 1,200 | 1,131 |
Colombia [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 4,414 | 4,367 |
Brazil [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 31,741 | 38,765 |
Argentina [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | 312 | 306 |
Uruguay [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |  |  |
Disclosure of information for cash-generating units [line items] |  |  |  |
Goodwill and distribution rights allocated |  | $ 2,450 | $ 2,626 |

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