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Balances and Transactions in Foreign Currencies - Summary of Transactions in Foreign Currencies (Detail) - MXN ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Balances and Transactions in Foreign Currencies [Line Items] |  |  |
Revenues | $ 1,909 | $ 4,103 | $ 1,911
Other Operating Revenues | 1,679 | 1,431 | 473
Purchases of Raw Materials | 16,407 | 15,065 | 11,712
Interest Expense | 2,986 | 3,678 | 1,973
Consulting Fees | 302 | 410 | 36
Asset Acquisitions | 276 | 407 | 75
Other | 4,072 | 3,348 | 2,276
U.S. dollars [member] |  |  |
Disclosure of Balances and Transactions in Foreign Currencies [Line Items] |  |  |
Revenues | 1,909 | 4,068 | 1,891
Other Operating Revenues | 1,677 | 1,281 | 472
Purchases of Raw Materials | 16,320 | 14,961 | 11,710
Interest Expense | 2,534 | 3,173 | 1,973
Consulting Fees | 267 | 182 | 34
Asset Acquisitions | 272 | 407 | 75
Other | 4,052 | 3,339 | 2,035
Euro [member] |  |  |
Disclosure of Balances and Transactions in Foreign Currencies [Line Items] |  |  |
Revenues |  | 6 |
Other Operating Revenues | 2 |  | 1
Purchases of Raw Materials | 87 | 104 | 2
Interest Expense | 452 | 355 |
Consulting Fees | 23 | 43 | 2
Asset Acquisitions | 4 |  |
Other | 20 | 5 | 37
Other currencies [member] |  |  |
Disclosure of Balances and Transactions in Foreign Currencies [Line Items] |  |  |
Revenues |  | 29 | 20
Other Operating Revenues |  | 150 |
Interest Expense |  | 150 |
Consulting Fees | $ 12 | 185 |
Other |  | $ 4 | $ 204

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- Definition Other foreign currency transactions. + References No definition available. + Details
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- Definition Other revenue on exchange differences on translation. + References No definition available. + Details
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- Definition Purchase of raw material through foreign currency. + References No definition available. + Details
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- Definition Revenue through foreign currency. + References No definition available. + Details
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- Details
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- Details
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Period Type: |

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- Details
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Period Type: |