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Operating Expenses, Depreciation and Amortization - Summary of Consolidated Operating Expense (Detail) - MXN ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Analysis of income and expense [abstract]      
Administrative expenses $ 21,081 $ 20,750 $ 18,653
Selling expenses 6,450 6,974 5,883
Distribution and logistics expenses 28,495 26,245 23,374
Operating expenses $ 56,026 $ 53,969 $ 47,910