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Income Taxes - Schedule of Effective Tax Rate (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]      
Income tax by applying the weighted average statutory rate 30.00% 30.00% 30.00%
Effects of inflation over monetary assets (3.50%) (3.90%) (7.80%)
(Unrecognized) applied tax loss carryforwards 0.80% 0.80% 1.00%
Derecognition of deferred tax asset   0.90% 1.00%
Loss of goodwill impairment, not deductible     (0.10%)
Tax rate change in border area (0.10%) 0.30%  
Employee benefits (0.10%) (0.10%) (0.20%)
Cancellation of recoverable tax on assets - undue payments   (0.80%) (0.10%)
Other (1.30%) (0.60%) (0.60%)
Effective tax rate 25.80% 26.60% 23.20%
Income before income taxes $ 7,346,185 $ 7,007,672 $ 6,171,722
Income tax by applying the weighted average statutory rate 2,203,856 2,102,302 1,851,517
Effects of inflation over monetary assets (260,249) (271,601) (478,609)
(Unrecognized) applied tax loss carryforwards 61,953 57,733 62,975
Derecognition of deferred tax asset   60,115 63,657
Loss of goodwill impairment, not deductible     (4,043)
Tax rate change in border area (10,332) 19,391  
Employee benefits (9,586) (603) (12,220)
Cancellation of recoverable tax on assets - undue payments   (54,444) (7,587)
Other (94,199) (43,852) (35,049)
Income tax $ 1,891,443 $ 1,869,041 $ 1,440,641