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Bank Loans and issuance of Debt Securities - Summary of Issuance of Debt Securities (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Nov. 09, 2017
Apr. 06, 2017
Dec. 31, 2016
Jul. 08, 2016
Jan. 29, 2016
Feb. 20, 2015
Disclosure of debt securities [line items]                
Debt securities (Note 17.b) $ 9,000,000 $ 9,000,000     $ 5,200,000      
TIIE Rate Plus 24 Basis Point [Member] | Unsecured Debt GAP-15 [Member]                
Disclosure of debt securities [line items]                
Debt securities (Note 17.b) 2,200,000 2,200,000     2,200,000   $ 1,100,000 $ 1,100,000
Fixed Rate Interest [Member] | Unsecured Debt GAP-15-2 [Member]                
Disclosure of debt securities [line items]                
Debt securities (Note 17.b) 1,500,000 1,500,000     1,500,000     $ 1,500,000
TIIE Rate Plus 49 Basis Point [Member] | Unsecured Debt GAP-16 [Member]                
Disclosure of debt securities [line items]                
Debt securities (Note 17.b) 1,500,000 1,500,000     $ 1,500,000 $ 1,500,000    
TIIE Rate Plus 49 Basis Point [Member] | Unsecured Debt GAP-17 [Member]                
Disclosure of debt securities [line items]                
Debt securities (Note 17.b) 1,500,000 1,500,000   $ 1,500,000        
TIIE Rate Plus 44 Basis Point [Member] | Unsecured Debt GAP-17-2 [Member]                
Disclosure of debt securities [line items]                
Debt securities (Note 17.b) $ 2,300,000 $ 2,300,000 $ 2,300,000