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Other Current Assets and Other Current Financial Assets - Additional Information (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other Current Assets [abstract]      
Amortization of advertising and promotional expenses paid in advance $ 4,504 $ 5,030 $ 3,447