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Derivative Financial Instruments - Additional Information (Detail)
$ in Millions
 12 Months Ended
Mar. 29, 2019
MXN ($)
Feb. 27, 2019
MXN ($)
Feb. 26, 2019
MXN ($)
May 04, 2017
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2019
USD ($)
May 02, 2017
MXN ($)
Feb. 29, 2016
USD ($)
Jan. 31, 2016
MXN ($)
Jan. 31, 2016
USD ($)
Feb. 28, 2015
MXN ($)
Disclosure of detailed information about financial instruments [Line Items]                          
Issuance of debt securities         $ 12,000,000,000 $ 9,000,000,000 $ 9,000,000,000            
Description of derivative instruments variable interest rate basis Interest will be payable every 28 days at a variable rate of TIIE-28 plus 45 basis points                        
Derivative financial instrument basis points 45.00%                        
Unsecured credit agreement $ 3,000,000,000             $ 191.0          
Description of loan agreement maturity date         with monthly interest payments, for a term of 5 years                
Gain (loss) on derivative financial instruments         $ 149,770,000 29,642,000 34,361,000            
Amount recognized as derivative in other comprehensive income         $ 0 0 0            
Capitalization interest rate one         1.75%     1.75%          
Amount recognized as application of coverage in finance and interest income         $ 9,919,000 19,275,000              
Gain (loss) on sale of derivatives         97,449,000 115,938,000 34,361,000            
Interest rate swaps [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Amount recognized as derivative finance income (cost)         559,000                
Cash flow hedge [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Reserve for loss of the fair value         $ 172,094,000                
TIIE Rate [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Interest rate   8.03% 8.0315%           7.21%        
TIIE 28 [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Capitalization interest rate one         5.75%     5.75%          
Amount recognized as application of coverage in finance and interest income         $ 22,305,000 22,856,000 $ 19,607,000            
TIIE Rate Plus 49 Basis Point [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Description of derivative instruments variable interest rate basis         debt securities were placed at a 28-day TIIE variable rate plus 49 basis points                
Debt instrument interest rate       7.21%                  
TIIE Rate Plus 49 Basis Point [Member] | Interest rate swaps [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Gain (loss) on sale of derivatives         $ 17,300,000 $ 11,517,000              
TIIE Rate Plus 44 Basis Point [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Description of derivative instruments variable interest rate basis         debt securities were placed at a 28-day TIIE variable rate plus 44 basis points                
Debt instrument interest rate     8.0315%                    
TIIE Rate Plus 44 Basis Point [Member] | Interest rate swaps [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Gain (loss) on sale of derivatives         $ 6,450,000                
TIIE Variable Rate Plus 45 Basis Point [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Description of derivative instruments variable interest rate basis         stock certificates were placed at a 28-day TIIE variable rate plus 45 basis points                
Debt instrument interest rate   8.03%                      
TIIE Variable Rate Plus 45 Basis Point [Member] | Interest rate swaps [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Amount recognized as derivative finance income (cost)         $ 6,828,000                
TIIE Variable Rate Plus 45 Basis Point [Member] | Cash flow hedge [Member] | Interest rate swaps [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Amount recognized as derivative finance income (cost)         $ 725,000                
Scotiabank [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Unsecured credit agreement                       $ 95.5  
Scotiabank [Member] | TIIE 28 [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Capitalization interest rate one         5.75% 5.75% 5.75% 5.75%          
BBVA [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Unsecured credit agreement                   $ 95.5      
Nova Scotiabank And BBVA [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Borrowings interest rate basis         Libor 1M plus 99 and 105 basis points                
Debt securities [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Debt securities, value   $ 3,000,000,000 $ 2,300,000,000           $ 1,500,000,000        
Floor [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Collar category interest rate         4.05%                
Floor [Member] | Nova Scotiabank And BBVA [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Collar category interest rate         0.42%                
CAP I [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Collar category interest rate         5.75%                
CAP I [Member] | Nova Scotiabank And BBVA [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Collar category interest rate         1.75%                
CAP [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Collar category interest rate         6.75%                
CAP [Member] | Nova Scotiabank And BBVA [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Collar category interest rate         2.75%                
Tranche One [Member] | Unsecured Debt Securities G A P 15 [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Issuance of debt securities                         $ 1,100,000,000
Tranche Two [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Description of derivative instruments variable interest rate basis         Generates interest at a variable rate of TIIE-28 plus 24 basis points with a term of 5 years                
Derivative financial instrument basis points         0.24%     0.24%          
Description on period of derivative financial instruments variable interest rate         Term of 5 years                
Tranche Two [Member] | Unsecured Debt Securities G A P 15 [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Issuance of debt securities                     $ 1,100,000,000    
Unsecured Debt Securities G A P 15 [Member] | Debt securities [Member]                          
Disclosure of detailed information about financial instruments [Line Items]                          
Issuance of debt securities     $ 2,200,000,000