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Equity - Summary of Dividends Declared and Paid (Detail) - MXN ($) $ / shares in Units, $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid | $ 8,636 | $ 8,355 | $ 7,350
Series B shares [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid per share | $ 0.43067 | $ 0.41666 |
Series D shares [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid per share | $ 0.53833 | $ 0.52083 |
Coca Cola FEMSA [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Dividend declared and paid | $ 6,991 | $ 6,945 | $ 6,405

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