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Financial Instruments - Disclosure of Fair Value of Commodity Price Contracts (Detail) - Coca-Cola FEMSA [member] - MXN ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Aluminum price contracts [member] | Less than 1 year [member] | 2016 [member]
Disclosure of detailed information about hedges [line items]
Notional amount		$ 74
Fair Value Liability		5
Sugar Price Contracts [member] | Less than 1 year [member]
Disclosure of detailed information about hedges [line items]
Notional amount	$ 992
Fair Value Asset	(7)
Sugar Price Contracts [member] | Less than 1 year [member] | 2016 [member]
Disclosure of detailed information about hedges [line items]
Notional amount		572
Fair Value Asset		$ 370
Sugar Price Contracts [member] | 1-2 years [member]
Disclosure of detailed information about hedges [line items]
Notional amount	150
Fair Value Asset	$ 3

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- Definition

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- Definition

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

+ References

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- Definition

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

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- Definition

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