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Operating Expenses, Depreciation and Amortization - Summary of Depreciation and Amortization Recognized (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Depreciation and amortisation expense [abstract]      
Depreciation and amortization expense included in cost of sales $ 14,146 $ 14,180 $ 13,154
Depreciation and amortization expense included in administrative, selling and distribution and logistics expenses 1,846 1,811 1,504
Depreciation and amortization $ 15,992 $ 15,991 $ 14,658