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Bank Loans and Notes Payables - Summary of Interest Expense (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2017 MXN ($) | Dec. 31, 2017 USD ($) | [1] | Dec. 31, 2016 MXN ($) | Dec. 31, 2015 MXN ($)
Disclosure of detailed information about borrowings [abstract] |  |  |  |
Interest on debts and borrowings | $ 6,409 |  | $ 5,694 | $ 4,586
Capitalized interest | (10) |  | (32) | (60)
Finance charges for employee benefits | 317 |  | 282 | 276
Derivative instruments | 4,339 |  | 3,519 | 2,894
Finance operating charges | 69 |  | 183 | 79
Finance charges payable under finance leases |  |  |  | 2
Total | $ 11,124 | $ 566 | $ 9,646 | $ 7,777
[1] | Convenience translation to U.S. dollars ($) - See Note 2.2.3

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- Definition The gains (losses) on hedging instruments in fair value hedges. [Refer: Fair value hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 24 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_24_a_i&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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