The rate of expected credit losses, calculated as percentage of the gross carrying amount. Expected credit losses are the weighted average of credit losses with the respective risks of a default occurring as the weights.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph IG20D
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_IG20D&doctype=Implementation%20Guidance
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 35N
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35N&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_ExpectedCreditLossRate
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Trade Accounts Receivable, Net - Additional Information (Detail) - MXN ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Accounts Receivable [line items]
Expected credit loss percentage	5.00%
Top of range [member]
Disclosure Of Accounts Receivable [line items]
Percentage of unrecoverable trade accounts receivables	10.00%
The Coca-Cola company [member]
Disclosure Of Accounts Receivable [line items]
Contributions from related parties	$ 3,542	$ 3,436	$ 4,518