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Goodwill and Intangible Assets, Net - Summary of Goodwill Balances Allocated by Operating Segment (Detail) - MXN ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | $ 195,474 | $ 206,319 | $ 184,156 | $ 160,544
Mexico [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 7,371 | 7,529 |  |
United States [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 152,486 | 162,692 |  |
Spain [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 10,000 | 12,316 |  |
United Kingdom [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 6,335 | 6,371 |  |
France [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 4,796 | 4,524 |  |
Czech Republic [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 709 | 583 |  |
Colombia [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 6,146 | 6,461 |  |
Dominican Republic [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 279 | 250 |  |
Trinidad Cement Limited [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 2,027 | 0 |  |
Caribbean Argentina Costa Rica And Panama [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 985 | 1,036 |  |
Philippines [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 1,817 | 1,911 |  |
United Arab Emirates [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 1,769 | 1,865 |  |
Egypt [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 232 | 231 |  |
Other countries [member] |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | $ 522 | $ 550 |  |

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