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Trade Accounts Receivable, Net - Summary of Trade Receivable (Detail)
$ in Millions, $ in Millions
Sep. 30, 2019
USD ($)
Sep. 30, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Disclosure of Trade and Other Receivables [Line Items]      
Trade receivables   $ 7,780 $ 11,726
Other   1,317 1,108
Allowance for expected credit losses   (839) (595)
Trade Accounts Receivable, Net $ 555 10,960 14,847
The Coca-Cola Company [member]      
Disclosure of Trade and Other Receivables [Line Items]      
Current receivables from related parties   721 1,173
Loans to Employees [Member]      
Disclosure of Trade and Other Receivables [Line Items]      
Current receivables from related parties   94 77
FEMSA and subsidiaries [member]      
Disclosure of Trade and Other Receivables [Line Items]      
Current receivables from related parties   1,278 783
Other Related Parties [Member]      
Disclosure of Trade and Other Receivables [Line Items]      
Current receivables from related parties   $ 609 $ 575