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Finance Cost - Net - Summary of Net Finance (Cost) Income (Detail) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Finance Income Expense [Abstract]      
Interest income from cash equivalents $ 393,529 $ 354,439 $ 182,426
Interest on recovered taxes 1,472 8,791 16,199
Gain on derivative financial instruments 115,938 34,361 68,261
Interests in favor of hedge 44,292    
Other 21,463 23,144 12,684
Total interest income 576,694 420,735 279,570
Interest cost from bank loans (151,971) (124,438) (107,680)
Loss in market value (86,295)    
Other financing costs (29,891) (18,394) (24,622)
Interest cost for debt securities (744,254) (476,375) (249,406)
Total interest expense (1,012,411) (619,207) (381,708)
Foreign exchange gain 1,422,685 1,025,183 759,965
Foreign exchange loss (1,223,001) (926,100) (1,260,859)
Foreign exchange gains (loss) - Net 199,684 99,083 (500,894)
Finance cost - Net $ (236,033) $ (99,389) $ (603,032)