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Intangible Assets, Net and Goodwill - Summary of Aggregate Carrying Amount of Goodwill (Detail) $ in Thousands, $ in Millions | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 MXN ($)
--- | --- | --- | --- | ---
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | $ 145,566,497 | $ 7,396 | $ 151,463,232 | $ 152,632,635
Europe [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 53,066,729 |  | 53,143,542 |
Brazil [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 21,388,124 |  | 24,708,740 |
Puerto Rico [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 17,463,394 |  | 17,463,394 |
Dominican Republic [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 14,186,723 |  | 14,186,723 |
Mexico [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 12,770,381 |  | 13,981,033 |
Ecuador [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 9,856,601 |  | 9,852,912 |
Peru [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 3,086,981 |  | 3,958,110 |
El Salvador [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,576,214 |  | 2,834,134 |
Chile [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,510,577 |  | 2,510,577 |
Colombia [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,155,385 |  | 2,155,385 |
Other countries [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | $ 6,505,388 |  | $ 6,668,682 |

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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d&doctype=Appendix&seq=2 -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_134_a&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_135_a&doctype=Standard -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_c&doctype=Standard -URIDate 2018-03-16 + Details
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