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Trade Notes and Accounts Receivable, Net - Carrying Amount (Details) - MXN ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net $ 24,727,073 $ 24,906,452
U.S. dollar    
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net 2,103,300 3,508,188
Other currencies    
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net 210,621 325,116
Currencies other than Peso    
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net $ 2,313,921 $ 3,833,304