Financial Instruments - Summarizes Sugar Price and Aluminum Price Contracts (Detail) - MXN ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items]
Fair Value Asset	$ 955,000,000	$ 4,615,000,000
Cash flow hedges [member] \| Sugar price contracts [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date		2017
Notional Amount		$ 572,000,000
Fair Value Asset		$ 370,000,000
Cash flow hedges [member] \| Sugar price contracts [member] \| 2019 [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date	2018
Notional Amount	$ 986,000,000
Fair Value (Liability)	(26,000,000)
Fair Value Asset	$ 19,000,000
Cash flow hedges [member] \| Sugar price contracts [member] \| 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date	2019
Notional Amount	$ 150,000,000
Fair Value Asset	$ 3,000,000
Cash flow hedges [member] \| Aluminum price contracts [member]
Disclosure of detailed information about financial instruments [line items]
Maturity Date		2016
Notional Amount		$ 74,000,000
Fair Value Asset		$ 5,000,000

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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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.

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

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
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Derivative instrument maturity date.

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