XML 129 R93.htm IDEA: XBRL DOCUMENT
v3.19.1

Business Combinations, Acquisitions, Sale and Non-controlling Interest - Summary of Selected Financial Data From Statements of Financial Position (Parenthetical) (Detail) $ in Thousands | Dec. 31, 2017 MXN ($)
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Undated Subordinated Fixed Rate Bond [member] |
Disclosure of detailed information about business combination [line items] |
Undated subordinated fixed rate bond | $ 14,942,886

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- Definition The amount of bonds issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfBusinessCombinationsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_BorrowingsByNameAxis=amx_UndatedSubordinatedFixedRateBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |