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Equity Accounted Investees - Additional Information (Detail) € in Millions, $ in Millions |  | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2010 | Jun. 30, 2019 MXN ($) | Jun. 30, 2018 MXN ($) | Dec. 31, 2018 MXN ($) | Sep. 26, 2019 MXN ($) | Sep. 26, 2019 EUR (€) | Jun. 30, 2019 EUR (€) | Dec. 31, 2018 EUR (€)
Heineken [member] |  |  |  |  |  |  |  |
Disclosure of Investments in Subsidiaries Joint Ventures and Associates [Line items] |  |  |  |  |  |  |  |
Ownership Percentage | 20.00% | 14.80% |  | 14.76% |  |  |  |
Equity income recognized from ownership interest, net of tax |  | $ 3,140 | $ 3,109 |  |  |  |  |
Dividends received |  | $ 1,832 | $ 1,797 |  |  |  |  |
Heineken Company [member] |  |  |  |  |  |  |  |
Disclosure of Investments in Subsidiaries Joint Ventures and Associates [Line items] |  |  |  |  |  |  |  |
Ownership Percentage |  | 8.63% |  |  |  |  |  |
Fair value of investments in accociates representing 20% of its outstanding shares |  | $ 177,913 |  | $ 145,177 |  |  | € 8,137 | € 6,441
Heineken Company [member] | Actuarial assumption of retirement age [member] |  |  |  |  |  |  |  |
Disclosure of Investments in Subsidiaries Joint Ventures and Associates [Line items] |  |  |  |  |  |  |  |
Fair value of investment in joint ventures |  |  |  |  | $ 183,518 | € 8,526 |  |

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