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Other Liabilities, Provisions and Contingencies - Nature and Amount of Loss Contingencies (Detail) - MXN ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Disclosure of financial liabilities [line items]    
Provisions $ 9,756 $ 9,928
Indirect taxes [member]    
Disclosure of financial liabilities [line items]    
Provisions 5,403 5,421
Labor [member]    
Disclosure of financial liabilities [line items]    
Provisions 1,192 2,601
Legal [member]    
Disclosure of financial liabilities [line items]    
Provisions $ 3,161 $ 1,906