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Other Expenses, Net - Summary of Other Expenses (Parenthetical) (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($) | Dec. 31, 2015 MXN ($)
Material income and expense [abstract] |  |  |  |
Impairment losses of fixed assets |  | $ 984 | $ 1,899 | $ 1,145
Impairment losses of goodwill |  | 1,920 | $ 0 | $ 0
Income tax penalty imposed | $ 25 | $ 491 |  |

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- Definition Fines and penalty expense. + References No definition available. + Details
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- Definition Impairment loss on fixed assets. + References No definition available. + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B67_d_v&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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- References No definition available. + Details
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