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Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 1 Months Ended 12 Months Ended
Apr. 30, 2017
Nov. 30, 2016
Dec. 31, 2018
Dec. 31, 2017
MXN ($)
$ / $
/ $
/ EUR
Years
Age
Dec. 31, 2017
USD ($)
Years
Age
Dec. 31, 2016
MXN ($)
/ $
Dec. 31, 2015
MXN ($)
Dec. 31, 2016
USD ($)
/ $
Disclosure of changes in accounting estimates [line items]                
Impairment charges of property plan and equipment       $ 1,098,000,000        
Net sales       203,374,000,000 $ 10,355 $ 177,082,000,000 $ 151,914,000,000  
Net (loss) income       $ (11,654,000,000) $ (594) 10,527,000,000 10,329,000,000  
Official exchange rate | $ / $       19.64        
Cash and cash equivalents maturity period       3 months 3 months      
Amortization expense       $ 759,000,000   582,000,000 317,000,000  
Investment in joint venture       0   0    
Impairment on investment       $ 210,000,000        
Minimum year of service for retirement benefits | Years       0 0      
Minimum age for retirement benefits | Age       60 60      
Distribution costs       $ 25,041,000,000   $ 20,250,000,000 $ 20,205,000,000  
Profit sharing computation ratio on income       10.00% 10.00%      
Income tax rate       30.00% 30.00% 30.00% 30.00%  
Property, plant and equipment [member]                
Disclosure of changes in accounting estimates [line items]                
Impairment of long lived assets       $ 1,098,000,000        
Distribution rights 1 [member]                
Disclosure of changes in accounting estimates [line items]                
Impairment of long lived assets       $ 745,000,000        
National wholesale price index [member]                
Disclosure of changes in accounting estimates [line items]                
Cumulative inflation percentage   92.20%            
Coeficiente de estabilizacion de referencia [member]                
Disclosure of changes in accounting estimates [line items]                
Cumulative inflation percentage 95.50%              
Bottler agreement [member]                
Disclosure of changes in accounting estimates [line items]                
Intangible assets renewable term       10 years 10 years      
Glass bottles [member]                
Disclosure of changes in accounting estimates [line items]                
Estimated useful life of bottles       3 years 3 years      
PET bottles [member]                
Disclosure of changes in accounting estimates [line items]                
Estimated useful life of bottles       1.5 years 1.5 years      
Venezuela [member]                
Disclosure of changes in accounting estimates [line items]                
Extraordinary loss related to deconsolidation       $ 28,177,000,000        
Reclasification of previously recorded in accumulated foreign currency translation losses in equity       26,123,000,000        
Impairment charge       2,053,000,000        
Impairment charges of distribution rights       745,000,000        
Impairment charges of property plan and equipment       1,098,000,000        
Impairment charges of remeasurement at fair-value of investment       210,000,000        
Net sales       4,005,000,000        
Net (loss) income       $ (2,223,000,000)        
Official exchange rate | / $       22,793        
Cumulative inflation percentage       100.00% 100.00%      
Cumulative inflation period       P3Y P3Y      
Mexico [member]                
Disclosure of changes in accounting estimates [line items]                
Income tax rate       30.00% 30.00% 30.00% 30.00%  
Mexico [member] | Scenario, forecast [member]                
Disclosure of changes in accounting estimates [line items]                
Income tax rate     30.00%          
DIPRO [member]                
Disclosure of changes in accounting estimates [line items]                
Liabilities recorded using exchange rate               $ 629
Official exchange rate | / $           10   10
DICOM [member]                
Disclosure of changes in accounting estimates [line items]                
Liabilities recorded using exchange rate               $ 104
Official exchange rate | / $           673.76   673.76
DICOM [member] | Venezuela [member] | United States of America, Dollars [member]                
Disclosure of changes in accounting estimates [line items]                
Official exchange rate | / $       25,000        
DICOM [member] | Venezuela [member] | Euro member countries, Euro (member)                
Disclosure of changes in accounting estimates [line items]                
Official exchange rate | / EUR       30,987