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Trade Notes and Accounts Receivable, Net - Aging Analysis (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
1 to 90 days    
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net 3,830,620 5,421,772
91 to 180 days    
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net 1,019,717 1,303,596
More than 180 days    
Disclosure of trade notes and accounts receivable    
Trade notes and accounts receivable, net $ 4,295,611 $ 3,233,269