XML 184 R81.htm IDEA: XBRL DOCUMENT
v3.20.1

Property, Plant and Equipment, net - Additional Information (Details) (Detail) - MXN ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items] |  |
Methods used to determine stage of completion of construction in progress | The completion period of construction in progress is variable and depends upon the type of plant and equipment under construction. |
Land and buildings and other equipment [member] | Claro Brasil [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property, plant and equipment, pledged in guarantee of legal proceedings |  | $ 3,166,882

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- Definition Method Used To Determine Stage Of Completion Of Construction In Progress + References No definition available. + Details
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Namespace Prefix: | amx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of property, plant and equipment pledged as security for liabilities. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 74 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_74_a&doctype=Standard -URIDate 2019-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=amx_LandAndBuildingsAndOtherEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=amx_ClaroBrasilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |