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Financial Risk Management - Summary of Decrease in Interbank Interest Rates (Basis Points) (Detail)
$ in Thousands
Dec. 31, 2020
MXN ($)
Likely (25 bps) [Member]  
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]  
Derivative, value or contract $ (55,514)
Possible (50 bps) [Member]  
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]  
Derivative, value or contract (83,271)
Stress (100 bps) [Member]  
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]  
Derivative, value or contract (210,953)
Cash flow hedge [Member] | Likely (25 bps) [Member]  
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]  
Derivative, value or contract (55,514)
Cash flow hedge [Member] | Possible (50 bps) [Member]  
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]  
Derivative, value or contract (83,271)
Cash flow hedge [Member] | Stress (100 bps) [Member]  
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]  
Derivative, value or contract $ (210,953)