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Bank Loans and Notes Payable - Summary of Interest Expense (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 detailed information about borrowings [abstract]        
Interest on debts and borrowings $ 6,760   $ 6,377 $ 5,694
Capitalized interest (5)   (10) (32)
Finance charges for employee benefits 373   317 282
Derivative instruments 2,649   4,339 3,519
Finance operating charges 47   69 183
Total $ 9,825 $ 500 $ 11,092 [2] $ 9,646
[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