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Revenue - Summary of Disaggregation of Revenue by Geographic Area, Business Unit and Products and Services Categories (Parenthetical) (Detail)
$ in Millions, $ in Millions
 6 Months Ended
Jun. 30, 2019
MXN ($)
Jun. 30, 2019
USD ($)
 [1],[2]
Jun. 30, 2018
MXN ($)
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues $ 244,371 [1] $ 12,722 $ 226,939 [3],[4]
Mexico [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues 167,754   153,386
Brazil [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues 31,513   30,018
Colombia [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues 7,883   8,355
Argentina [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues 3,851   5,780
Chile [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues 24,444   $ 22,339
Uruguay [member]      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Total revenues $ 1,653    
[1] The Company initially adopted IFRS 16 at January 1st, 2019 using the modified retrospectively effect method under which the comparative information is not restated. - See Note 2.4.1
[2] Convenience translation to U.S. dollars ($) - See Note 2.2.3
[3] Revised to reflect the discontinued Philippines operations of Coca-Cola FEMSA - See Note 4.2.1
[4] The information herein was not restated with the adjustment, which was not material, to reflect the financial information of its subsidiary in Argentina that operates in a hyperinflationary economic environment.