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Intangible Assets - Disclosure of Detailed Information About Carrying Amounts of Goodwill (Detail) - MXN ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | $ 111,347 | $ 118,130
Mexico [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 56,352 | 56,352
Guatemala [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 1,853 | 488
Nicaragua [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 460 | 484
Costa Rica [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 1,417 | 1,520
Panama [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 1,182 | 1,185
Colombia [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 4,600 | 5,824
URUGUAY |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 3,003 |
Brazil [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 42,153 | 48,345
Argentina [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | $ 327 | 50
Philippinnes [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill |  | $ 3,882

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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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