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Income Taxes - Additional Information (Detail)
$ in Millions
 1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended 5 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2020
Nov. 18, 2019
Jun. 30, 2019
Mar. 01, 2019
Dec. 31, 2018
MXN ($)
Sep. 01, 2018
Nov. 17, 2019
Jan. 31, 2021
Dec. 31, 2019
MXN ($)
Sep. 30, 2019
Dec. 31, 2018
MXN ($)
May 31, 2020
Nov. 30, 2020
Jun. 30, 2019
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
MXN ($)
$ / l
Dec. 31, 2020
USD ($)
$ / l
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Major Components Of Tax Expense Income [line items]                                        
Unrecognized deferred tax liabilities         $ 9,237,000,000       $ 13,187,000,000   $ 9,237,000,000           $ 5,212,000,000   $ 13,187,000,000 $ 9,237,000,000
Deferred tax expense arising from write-down or reversal of write-down of deferred tax asset                                 $ 2,349,000,000      
NOLs usage limit                                 30.00% 30.00%    
Applicable tax rate                                 30.00% 30.00% 30.00% 30.00%
Non deductible interests limitation period percentage                                 30.00% 30.00%    
Brazil                                        
Major Components Of Tax Expense Income [line items]                                        
Recoverable taxes                 $ 4,223               $ 2,523   $ 4,223  
Average federal production and federal sales tax                                 15.90% 15.90%    
Excise tax rate           20.00%         4.00%                  
Excise tax rate increased                         8.00%       8.00% 8.00%    
Excise tax rate decreased               4.00%                        
Brazil | Changes in Tax Rates or Tax Laws Enacted or Announced                                        
Major Components Of Tax Expense Income [line items]                                        
Excise tax rate     12.00%           10.00% 8.00%   4.00%   4.00%            
Argentina                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate                                     35.00% 35.00%
Sales taxes percentage                                 1.50% 1.50%   1.75%
Argentina | Bottom of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                                       1.00%
Argentina | Top of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                                       2.00%
Argentina | Two Thousand Eighteen and Nineteen                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate                                     30.00% 30.00%
Argentina | Two Thousand Nineteen Onwards                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate                                 25.00% 25.00%    
Percentage of dividend received nonresidents withholding                                 13.00% 13.00%    
Argentina | Two Thousand Twenty Onwards                                        
Major Components Of Tax Expense Income [line items]                                        
Dividend withholding tax rate                                 7.00% 7.00% 7.00% 7.00%
Corporate income tax                                 30.00% 30.00%    
Argentina | Two Thousand and Eighteen                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                                       1.50%
Argentina | Two Thousand and Nineteen                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                                     1.50%  
Argentina | Two Thousand and Twenty                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                                 1.00% 1.00%    
Argentina | Two Thousand and Twenty One                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                               0.50%        
Argentina | Two Thousand and Twenty Two                                        
Major Components Of Tax Expense Income [line items]                                        
Sales taxes percentage                                       0.00%
Mexico                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate                                 30.00% 30.00% 30.00% 30.00%
Mexico | Two Thousand Twenty Onwards                                        
Major Components Of Tax Expense Income [line items]                                        
Excise tax rate                                 25.00% 25.00%    
Net interest deduction adjusted taxable income rate                                 30.00% 30.00%    
Exception for deductible interest                                 $ 20,000,000 $ 1    
Non-deductible interests limitation period                                 10 years 10 years    
Mexico | Two Thousand Twenty Onwards | Bottom of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Excise tax per liter on the production | $ / l                                 1.17 1.17    
Mexico | Two Thousand Twenty Onwards | Top of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Excise tax per liter on the production | $ / l                                 1.2616 1.2616    
Colombia                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         33.00%                              
Minimum assumed income tax rate                                 1.50% 1.50%    
Dividend tax on resident individuals                                 15.00% 15.00%    
Dividends tax rate applicable to foreign nonresidents                                 7.50% 7.50%    
Percent of municipality sales tax as a credit                                 100.00% 100.00%    
Colombia | Bottom of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Dividend tax on distributions                                 5.00% 5.00%    
Colombia | Top of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Dividend tax on distributions                                 7.50% 7.50%    
Colombia | Two Thousand Twenty Onwards                                        
Major Components Of Tax Expense Income [line items]                                        
Minimum assumed income tax rate                                 0.50% 0.50%    
Dividend tax on resident individuals                                 10.00% 10.00%    
Dividends tax rate applicable to foreign nonresidents                                 10.00% 10.00%    
Colombia | Two Thousand and Nineteen                                        
Major Components Of Tax Expense Income [line items]                                        
Percentage of increase in income tax rate         3.50%                              
Municipality sales tax                                     50.00%  
Colombia | Two Thousand and Twenty                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         32.00%                              
Percentage of increase in income tax rate         1.50%                              
Municipality sales tax                                 100.00% 100.00%    
Colombia | Two Thousand and Twenty One                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         31.00%                              
Percentage of increase in income tax rate                             0.00%          
Colombia | Two Thousand and Twenty Two                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         30.00%                              
Colombia | In Two Thousand Twenty One Onwards                                        
Major Components Of Tax Expense Income [line items]                                        
Minimum assumed income tax rate                                 0.00% 0.00%    
Costa Rica                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         15.00%                              
Value-added tax         13.00%                              
Percentage of interest expenses         20.00%                              
Costa Rica | Bottom of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         25.00%                              
Costa Rica | Top of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Applicable tax rate         2000.00%                              
Panama                                        
Major Components Of Tax Expense Income [line items]                                        
Excise tax rate 5.00% 7.00%         5.00%                          
Percentage of consumption tax on syrups             10.00%                   10.00% 10.00%    
Nicaragua | Bottom of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Percentage of reform income tax rate       9.00%                                
Minimum alternative income tax increased percentage       1.00%                                
Nicaragua | Weighted Average                                        
Major Components Of Tax Expense Income [line items]                                        
Percentage of reform income tax rate       11.00%                                
Nicaragua | Top of Range                                        
Major Components Of Tax Expense Income [line items]                                        
Percentage of reform income tax rate       13.00%                                
Minimum alternative income tax increased percentage       3.00%                                
Nicaragua | Two thousand twenty one                                        
Major Components Of Tax Expense Income [line items]                                        
Percentage of reform income tax rate starting                                 15.00% 15.00%