XML 155 R82.htm IDEA: XBRL DOCUMENT
v3.21.1

Intangible Assets, Net and Goodwill - Summary of Aggregate Carrying Amount of Goodwill (Detail) $ in Thousands, $ in Millions | Dec. 31, 2020 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
--- | --- | --- | --- | ---
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | $ 143,052,859 | $ 7,171 | $ 152,899,801 | $ 145,566,497
Europe [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 53,388,139 |  | 52,950,325 |
Brazil [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 18,730,686 |  | 28,062,398 |
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 | 10,148,380 |  | 10,148,380 |
Ecuador [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,155,384 |  | 2,155,384 |
Peru [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,710,979 |  | 2,739,947 |
El Salvador [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,499,544 |  | 2,499,552 |
Chile [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 2,558,098 |  | 2,364,816 |
Colombia [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 12,253,743 |  | 12,124,685 |
Other countries [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 1,293,356 |  | 1,738,479 |
United States (Tracfone) [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | 3,362,900 |  | 3,220,105 |
Guatemala [member] |  |  |  |
Disclosure of carrying value of goodwill [line items] |  |  |  |
Goodwill | $ 2,301,533 |  | $ 3,245,613 |

X
- Definition Disclosure of carrying value of goodwill. + References No definition available. + Details
Name: | amx_DisclosureOfCarryingValueOfGoodwillLineItems
Namespace Prefix: | amx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 2020-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_a&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_135_a&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_Goodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_BR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_PR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_DO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_MX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_EC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_PE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_SV
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=amx_OtherCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=amx_UnitedStatesTracfoneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_GT
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |