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Intangible Assets - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2017
MXN ($)
BasisPoint
Dec. 31, 2016
MXN ($)
Dec. 31, 2015
MXN ($)
Disclosure of detailed information about intangible assets [line items]      
Risk premium basis points | BasisPoint 0.0100    
Cost of Sales [member]      
Disclosure of detailed information about intangible assets [line items]      
Amortization of intangible assets $ 22 $ 8 $ 5
Selling and Marketing Expense [member]      
Disclosure of detailed information about intangible assets [line items]      
Amortization of intangible assets 83 106 60
General and Administrative Expense [member]      
Disclosure of detailed information about intangible assets [line items]      
Amortization of intangible assets $ 544 358 309
Intangible assets and goodwill [member]      
Disclosure of detailed information about intangible assets [line items]      
Borrowing costs capitalized   8 28
Borrowing costs incurred in relation with qualifying assets   $ 28 $ 410
capitalization rate of borrowing costs eligible for capitalization   4.10% 4.10%
Technology costs and management systems [member] | Bottom of range [member]      
Disclosure of detailed information about intangible assets [line items]      
Useful lives of intangible assets 3 years    
Technology costs and management systems [member] | Top of range [member]      
Disclosure of detailed information about intangible assets [line items]      
Useful lives of intangible assets 10 years