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Information by Segment - Summary of Geographic Disclosure (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 geographical areas [line items] |  |  |  |
Total revenues | $ 460,456 | $ 23,445 | $ 399,507 | $ 311,589
Total Non Current Assets | 407,353 |  | 427,672 | 322,609
Geographical Elimination [member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total revenues | (1,071) |  | (1,099) | (806)
Mexico and Central America [member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total revenues | 301,463 |  | 267,732 | 228,563
Total Non Current Assets | 176,174 |  | 176,613 | 158,506
South America [member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total revenues | 135,608 |  | 113,937 | 74,928
Total Non Current Assets | 130,225 |  | 138,549 | 67,568
Venezuela [member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total revenues | 3,932 |  | 18,937 | 8,904
Total Non Current Assets | 1 |  | 7,281 | 3,841
Europe [member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total Non Current Assets | 83,720 |  | $ 105,229 | $ 92,694
Asia [Member] |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Total revenues | 20,524 |  |  |
Total Non Current Assets | $ 17,233 |  |  |
[1] | Convenience translation to U.S. dollars ($) - See Note 2.2.3

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