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Income Taxes - Schedule of Effective Tax Rate (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes [Abstract]      
Income tax by applying the weighted average statutory rate 30.00% 29.50% 29.50%
Effects of tax inflation over monetary assets (7.80%) (0.10%) (3.80%)
(Unrecognized) applied tax loss carryforwards 1.00% (2.10%) (2.30%)
Derecognition of deferred tax asset 1.00%    
Loss of goodwill impairment, not deductible (0.10%)    
Employee benefits (0.20%)    
Cancellation of recoverable tax on assets - undue payments (0.10%)    
Cancellation of non-recoverable ISR from dividends     0.30%
Other (0.60%) 0.10% (0.30%)
Effective tax rate 23.30% 27.40% 23.40%
Income before income taxes $ 6,171,722 $ 4,620,132 $ 3,618,086
Income tax by applying the weighted average statutory rate 1,851,517 1,362,939 1,067,335
Effects of tax inflation over monetary assets (478,609) (4,893) (138,985)
(Unrecognized) applied tax loss carryforwards 62,975 (96,635) (81,645)
Derecognition of deferred tax asset 63,657    
Loss of goodwill impairment, not deductible (4,043)    
Employee benefits (12,220)    
Cancellation of recoverable tax on assets - undue payments (7,587)    
Cancellation of non-recoverable ISR from dividends     11,379
Other (35,049) 5,162 (10,775)
Income tax $ 1,440,641 $ 1,266,573 $ 847,309