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Finance Cost - Net - Summary of Net Finance (Cost) Income (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Finance Income Expense [Abstract]      
Interest income from cash equivalents $ 464,499 $ 393,529 $ 354,439
Interest on recovered taxes 22,691 1,472 8,791
Gain on derivative financial instruments 97,449 115,938 34,361
Interests in favor of hedge 71,854 44,292  
Other 9,336 21,463 23,144
Total finance income 665,829 576,694 420,735
Interest cost from bank loans (177,504) (151,971) (124,438)
Interest cost from hedges (1,284)    
Loss in market value (247,219) (86,295)  
Other financing costs (23,967) (29,891) (18,394)
Interest cost for debt securities (975,772) (744,254) (476,375)
Total finance cost (1,425,746) (1,012,411) (619,207)
Exchange gain 1,187,240 1,422,685 1,025,183
Exchange loss (1,098,455) (1,223,001) (926,100)
Exchange gain - Net 88,785 199,684 99,083
Finance cost - Net $ (671,132) $ (236,033) $ (99,389)