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Accounts Receivable from Subscribers, Distributors, Recoverable Taxes and Other, Net - Summary of Accounts Receivable from Subscribers and Distributors Included in the Allowance for Doubtful Accounts (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Disclosure of accounts receivable [line items]        
Allowance for bad debts $ 39,044,925 $ 37,351,677 $ 27,495,158 $ 25,685,528
Receivable from subscribers and distributors [member]        
Disclosure of accounts receivable [line items]        
Allowance for bad debts 39,044,925 37,351,677    
61 - 90 days [member] | Receivable from subscribers and distributors [member]        
Disclosure of accounts receivable [line items]        
Allowance for bad debts 3,807,945 3,970,770    
Greater than 90 days [member] | Receivable from subscribers and distributors [member]        
Disclosure of accounts receivable [line items]        
Allowance for bad debts $ 35,236,980 $ 33,380,907