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Financial Instruments - Summary of Cash Flows Hedge Exposures (Detail) - Foreign exchange currency risk [member] - MXN ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Net sales trade receivables and borrowings [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Cash flow hedge reserve | $ 0 | $ 0
Cash flow hedge costs | 0 | 0
Remained balances of cash flow hedge reserve from which reserve from which hedge accounting is not applied | 0 | 0
Purchase of stock [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Cash flow hedge reserve | 1 | 0
Cash flow hedge costs | 22 | 11
Remained balances of cash flow hedge reserve from which reserve from which hedge accounting is not applied | $ 0 | $ 0

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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. + Details
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- Definition A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2019-01-01 -Paragraph 6.5.11 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2019-en-r&anchor=para_6.5.11&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition A component of equity representing the reserve of cash flow hedges in relation to hedging relationships for which hedge accounting is no longer applied. [Refer: Reserve of cash flow hedges] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24B -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24B_b_iii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Cash flow hedge costs. + References No definition available. + Details
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- Details
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- Details
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- Details
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