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Financial Instruments - Disclosure of Fair Value of Commodity Price Contracts (Detail) - Coca-Cola FEMSA [member] - MXN ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Sugar Price Contracts [member] | Less than 1 year [member]
Disclosure of detailed information about hedges [line items]
Notional amount	$ 1,223	$ 992
Fair Value Asset	(88)	(7)
Sugar Price Contracts [member] | 1-2 years [member]
Disclosure of detailed information about hedges [line items]
Notional amount		150
Fair Value Asset		$ 3
Aluminum price contracts [member] | Less than 1 year [member]
Disclosure of detailed information about hedges [line items]
Notional amount	265
Fair Value Liability	(17)
PX MEG contracts [member] | Less than 1 year [member]
Disclosure of detailed information about hedges [line items]
Notional amount	1,303
Fair Value Liability	$ (131)

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The fair value of financial assets. [Refer: At fair value [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2018-01-01
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- Definition

The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

+ References

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-IssueDate 2018-01-01
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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

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-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
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