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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
 12 Months Ended
Dec. 31, 2018
MXN ($)
Dec. 31, 2018
USD ($)
 [1]
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues $ 469,744 $ 23,924 $ 439,932 [2] $ 399,507
Mexico [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues 319,792   288,783 254,643
Brazil [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues 63,601   64,345 48,924
Colombia [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues 19,245   17,545 17,027
Argentina [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues 9,237   13,938 12,340
Chile [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues 44,576   $ 40,660 $ 36,631
Uruguay [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenues $ 1,925      
[1] Convenience translation to U.S. dollars ($) - See Note 2.2.3
[2] Revised to reflect the discontinued Philippines operations of Coca-Cola FEMSA - See Note 4.2.1