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Income Taxes - Schedule of Deferred Income Tax (Parenthetical) (Detail) $ in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 MXN ($) | Dec. 31, 2017 USD ($) | [1] | Dec. 31, 2016 MXN ($)
Disclosure of income taxes [Line Items] |  |  |
Deferred tax recovery period | 10 years |  |
Deferred tax liability | $ 6,133 | $ 312 | $ 11,037
Venezuela [member] |  |  |
Disclosure of income taxes [Line Items] |  |  |
Deferred tax liability | $ 1,107 |  |
[1] | Convenience translation to U.S. dollars ($) - See Note 2.2.3

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