XML 137 R101.htm IDEA: XBRL DOCUMENT
v3.19.1

Income Taxes - Combined Income Before Taxes and Combined Provision for Taxes (Detail) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Major components of tax expense (income) [abstract] |  |  |
Combined income before taxes | $ 66,314,883 | $ 38,286,046 | $ 45,697,258
Combined tax provision differences not deducible-not cumulative in the foreign subsidiaries | $ 20,593,392 | $ 5,790,950 | $ 9,169,083

X
- Definition Combined income before taxes. + References No definition available. + Details
Name: | amx_CombinedIncomeBeforeTaxes
Namespace Prefix: | amx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Combined tax provision differences not deductible-not cumulative in the foreign subsidiaries. + References No definition available. + Details
Name: | amx_CombinedTaxProvisionDifferencesNotDeductiblenotCumulativeInTheForeignSubsidiaries
Namespace Prefix: | amx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_MajorComponentsOfTaxExpenseIncomeAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration