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Derivative Financial Instruments - Additional Information (Detail)
$ in Millions
 12 Months Ended
May 04, 2017
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Dec. 31, 2017
USD ($)
Mar. 04, 2016
Feb. 29, 2016
USD ($)
Jan. 31, 2016
USD ($)
Dec. 31, 2015
MXN ($)
Feb. 28, 2015
MXN ($)
Disclosure of detailed information about financial instruments [Line Items]                  
Issuance of debt securities   $ 9,000,000,000 $ 5,200,000,000         $ 2,600,000,000  
Description of derivative instruments variable interest rate basis   debt securities certificates were issued at a 28-day TIIE variable rate plus 49 base points              
Unsecured credit agreement       $ 191.0          
Description of loan agreement maturity date   with monthly interest payments, for a term of 5 years              
Gain (loss) on derivative financial instruments   $ 34,361,000 68,261,000            
Amount recognised as derivative in other comprehensive income   0              
Amount recognised as application of coverage in comprehensive income   19,607,000 607,000            
Gain (loss) on sale of derivatives   34,361,000 $ 68,261,000            
Debt instrument interest rate 7.21%                
Interest Rate Swap Contract [Member]                  
Disclosure of detailed information about financial instruments [Line Items]                  
Gain (loss) on sale of derivatives   $ 715,000              
T I I E 28 [Member]                  
Disclosure of detailed information about financial instruments [Line Items]                  
Capitalization interest rate one   5.75% 5.75% 5.75%          
Top of Range [Member]                  
Disclosure of detailed information about financial instruments [Line Items]                  
Capitalization interest rate one         1.75%        
Bottom of Range [Member]                  
Disclosure of detailed information about financial instruments [Line Items]                  
Capitalization interest rate two         2.75%        
Scotiabank [Member]                  
Disclosure of detailed information about financial instruments [Line Items]                  
Unsecured credit agreement             $ 95.5    
Scotiabank [Member] | T I I E 28 [Member]                  
Disclosure of detailed information about financial instruments [Line Items]                  
Capitalization interest rate one   5.75% 5.75% 5.75%          
Capitalization interest rate two   6.75% 6.75% 6.75%          
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   one month LIBOR plus 99 and 105 basis points              
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   $ 110,000,001,000