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Other Liabilities, Provisions and Commitments - Summary of Other Non-current Financial Liabilities (Detail) - MXN ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure of financial liabilities [line items]    
Other financial liabilities $ 1,169 $ 5,745
Derivative financial instruments [member]    
Disclosure of financial liabilities [line items]    
Other financial liabilities 578 5,476
Security deposits [member]    
Disclosure of financial liabilities [line items]    
Other financial liabilities $ 591 $ 269