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Mergers and Acquisitions - Summary of Vonpar's Pro Forma Financial Data of Historical Financial Statements Related to Business Combinations (Detail) - Vonpar [member] $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016 MXN ($) $ / shares
Disclosure of Detailed Information About Business Combination [Line Items]
Total revenues	$ 187,139
(Loss) income before taxes	15,819
Net (loss) income	$ 11,539
Earnings per share | $ / shares	$ 4.86

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The profit (loss) of the combined entity as though the acquisition date for all business combinations that occurred during the year had been as of the beginning of the annual reporting period. [Refer: Business combinations [member]; Profit (loss)]

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The revenue of the combined entity as though the acquisition date for all business combinations that occurred during the year had been as of the beginning of the annual reporting period. [Refer: Business combinations [member]; Revenue]

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