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Property, Plant and Equipment, Net - Additional Information (Detail) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [line items]      
Impairment in the property plan and equipment $ 1,098    
Property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Borrowing costs capitalized   $ 61 $ 57
Borrowing costs incurred in relation to qualifying assets   $ 99 $ 993
capitalization rate of borrowing costs eligible for capitalizations   4.50% 4.10%