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Equity - Dividends Declared and Paid (Detail) - MXN ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid | $ 10,360 | $ 9,692 | $ 9,220
Repurchased shares | $ 0 | $ 0 |
Series B shares [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid per share | $ 0.51667 | $ 0.48333 | $ 0.45980
Series D shares [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid per share | $ 0.64583 | $ 0.60417 | $ 0.57480
Coca-Cola FEMSA [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid | $ 10,210 | $ 7,437 | $ 7,038
Top of range [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Debt to earnings before interest, taxes, depreciation and amortization ratio | 1.50% |  |

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