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Income Taxes - Gross rollforward of deferred income tax assets, net (Details) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Gross rollforward of deferred income tax assets, net |  |  |
Deferred income tax account at beginning of period | $ 12,380,445 | $ 7,665,038 |
Income statement credit | 1,017,430 | 3,851,836 |
Tax change relating to components of other comprehensive income | (287,996) | 863,571 | $ 386,817
Credit (Charge) to Other Comprehensive Income and Shares Repurchased | (1,080,344) | 863,571 |
Loss on disposition of a Publishing business | (91,315) |  |
Deferred income tax account at end of period | $ 12,317,531 | $ 12,380,445 | $ 7,665,038

X
- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease in deferred tax liability (asset) resulting from the loss of control of a subsidiary. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81&doctype=Standard -URIDate 2017-03-09 + Details
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- References No definition available. + Details
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- Definition The amount of deferred income tax relating to amounts recognised in other comprehensive income. + References No definition available. + Details
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- Definition The amount of deferred income tax expense (income) relating to amounts recognised in other comprehensive income and equity. + References No definition available. + Details
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