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Operating Expenses, Depreciation and Amortization - Summary of Consolidated Operating Expense (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Analysis of income and expense [abstract]      
Administrative expenses $ 22,387 $ 21,053 $ 20,733
Selling expenses 6,315 6,429 6,945
Distribution and logistics expenses 31,992 28,485 26,235
Operating expenses $ 60,694 $ 55,967 $ 53,913