The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Income Taxes - Summary of Temporary Differences Giving Rise to Deferred Income Tax Liabilities (Assets) (Parenthetical) (Detail) $ in Millions	Dec. 31, 2017 MXN ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 MXN ($)	Dec. 31, 2016 USD ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liability	$ 1,714	$ 87,000,000	$ 1,205
Venezuela [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liability				$ 1,107