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Income Taxes - Schedule of Effective Tax Rate (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Taxes [Abstract]      
Income tax by applying the weighted average statutory rate 30.00% 30.00% 29.50%
Effects of tax inflation over monetary assets (3.90%) (7.80%) (0.10%)
(Unrecognized) applied tax loss carryforwards 0.80% 1.00% (2.10%)
Derecognition of deferred tax asset 0.90% 1.00%  
Loss of goodwill impairment, not deductible   (0.10%)  
Tax rate change in border area 0.30%    
Employee benefits 0.10% (0.20%)  
Cancellation of recoverable tax on assets - undue payments (0.80%) (0.10%)  
Other (0.60%) (0.60%) 0.10%
Effective tax rate 26.70% 23.30% 27.40%
Income before income taxes $ 7,007,672 $ 6,171,722 $ 4,620,132
Income tax by applying the weighted average statutory rate 2,102,302 1,851,517 1,362,939
Effects of tax inflation over monetary assets (271,601) (478,609) (4,893)
(Unrecognized) applied tax loss carryforwards 57,733 62,975 (96,635)
Derecognition of deferred tax asset 60,115 63,657  
Loss of goodwill impairment, not deductible   (4,043)  
Tax rate change in border area 19,391    
Employee benefits (603) (12,220)  
Cancellation of recoverable tax on assets - undue payments (54,444) (7,587)  
Other (43,852) (35,049) 5,162
Income tax $ 1,869,041 $ 1,440,641 $ 1,266,573