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Income Taxes - Summary of Income Tax Expense (Benefit) (Detail) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of income taxes [line items]      
Current $ 722,474 $ 2,055,783 $ 2,117,491
Deferred (255,407) (164,340) (248,450)
Income tax 467,067 1,891,443 1,869,041
ISR [Member]      
Disclosure of income taxes [line items]      
Current 722,474 2,055,783 2,117,491
Deferred (255,407) (164,340) (248,450)
Income tax $ 467,067 $ 1,891,443 $ 1,869,041