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Financial Income and Other Items, Net - Summary of Financial Income and Other Items (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Material income and expense [abstract] |  |  |
Results in the sale of associates and remeasurement of previously held interest before change in control of associates (notes 4.1 and 13.1) | $ 4,164 | $ 0 | $ 0
Financial income | 338 | 402 | 318
Results from financial instruments, net (notes 13.2 and 16.4) | 161 | 113 | (2,729)
Foreign exchange results | (26) | 5,004 | 1,970
Effects of NPV on assets and liabilities and others, net | (1,021) | (1,030) | (892)
Other financial income (expense), net | $ 3,616 | $ 4,489 | $ (1,333)

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- Definition Effect of sale of associates and re-measurement of previously held interest before change in control of associates. + References No definition available. + Details
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- Definition Effects of net present value on assets and liabilities and other. + References No definition available. + Details
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- Definition The increase (decrease) in the fair value of credit derivatives or similar instruments related to financial assets designated as measured at fair value through profit or loss. [Refer: Derivatives [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 9 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_9_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Section A Statement of cash flows for an entity other than a financial institution -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=sect_AStatementofcashflowsforanentityotherthanafinancialinstitution&doctype=Illustrative%20Examples -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2017-01-01 -Paragraph 52 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_52_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of finance income that the entity does not separately disclose in the same statement or note. [Refer: Finance income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of finance income or cost that the entity does not separately disclose in the same statement or note. [Refer: Finance income (cost)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_85&doctype=Standard -URIDate 2017-03-09 + Details
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