XML 156 R83.htm IDEA: XBRL DOCUMENT
v3.21.1

Intangible Assets, Net and Goodwill - Additional Information (Detail) R$ in Thousands, $ in Thousands, $ in Thousands, € in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 29, 2020 MXN ($) Band | Feb. 29, 2020 USD ($) Band | Jan. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 COP ($) | Jan. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 BRL (R$) | Dec. 31, 2020 MXN ($) | Dec. 31, 2020 EUR (€) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
Acquisitions 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  | $ 20,338,080 |  | $ 20,209,434 | $ 25,798,610
IFETEL [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  |  |  | $ 459,668 |
Estimated useful life of intangible assets |  |  |  |  |  |  |  |  |  |  | 20 years |
Submarine Cable [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  |  |  |  |  |  |  |  | 10 years |
Renewal of license [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  | 3,457,251 |  |  |
Twenty Twenty Business Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Number of brands | Band | 2,500 | 2,500 |  |  |  |  |  |  |  |  |  |
30 Mhz spectrum [member] | Twenty Twenty Business Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license | $ 9,246,825 | $ 30 |  |  |  |  |  |  |  |  |  |
Estimated useful life of intangible assets | 20 years | 20 years |  |  |  |  |  |  |  |  |  |
400 MHZ [Member] | Renewal of license [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  | $ 1,649,525 |  |  |  |  |  |
400 MHZ [Member] | Twenty Twenty Business Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  | 1,806,875 |  |  |
Dominican Republic [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  | $ 709,829 | R$ 1,831,427 |  |  |  |
Estimated useful life of intangible assets |  |  |  |  |  |  | 11 years | 11 years |  |  |  |
Paraguay Puerto Rico Europe Argentina and other countries [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  | 3,517,415 |  |  |
Comcel [Member] | Renewal of license [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  | $ 2,753,768 | $ (468,511,573,375) |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  | 20 years | 20 years |  |  |  |  |  |  |
Puerto Rico Argentina Guatemala Panam And Others Countries [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  |  |  | $ 1,862,934 |
Puerto Rico Argentina Guatemala Panam And Others Countries [Member] | Twenty Twenty Business Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  | 1,701,682 |  |  |
CTE [Member] | Twenty Twenty Business Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  | $ 620,052 |  |  |  |  |  |  |  |  |
Number Of Pair of Frequencies |  |  | 12 months |  |  |  |  |  |  |  |  |
Austria [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  |  |  | $ 3,023,732 |
Austria [member] | 3.5 GHz [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license | € |  |  |  |  |  |  |  |  |  | € 64.3 |  |
Belarus [member] | 2.1 GHz [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license | € |  |  |  |  |  |  |  |  |  | 9.5 |  |
Croatia [member] | 2.1 GHz [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license | € |  |  |  |  |  |  |  |  |  | € 7.2 |  |
Slovenia [member] | Twenty Twenty Business Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of intangible assets and goodwill [line items] |  |  |  |  |  |  |  |  |  |  |  |
Amount paid for license |  |  |  |  |  |  |  |  | $ 1,704,280 |  |  |

X
- Definition Line items represent disclosure of intangible assets and goodwill. + References No definition available. + Details
Name: | amx_DisclosureOfIntangibleAssetsAndGoodwillLineItems
Namespace Prefix: | amx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated useful lives of intangible asset. + References No definition available. + Details
Name: | amx_EstimatedUsefulLivesOfIntangibleAsset
Namespace Prefix: | amx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of brands. + References No definition available. + Details
Name: | amx_NumberOfBrands
Namespace Prefix: | amx_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of pair of frequencies. + References No definition available. + Details
Name: | amx_NumberOfPairOfFrequencies
Namespace Prefix: | amx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_vi&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 40 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_40_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ConsiderationPaidReceived
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | amx_AcquisitionsAxis=amx_AcquisitionsTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IntangibleAssetsWithIndefiniteUsefulLifeAxis=amx_IfetelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IntangibleAssetsWithIndefiniteUsefulLifeAxis=amx_SubmarineCableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=amx_RenewalOfLicenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=amx_TwentyTwentyBusinessAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=amx_ThirtyMhzSpectrumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=amx_FourHundredMegaHertzFrequencyBandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=amx_ParaguayPuertoRicoEuropeArgentinaAndOtherCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=amx_ComcelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=amx_PuertoRicoArgentinaGuatemalaPanamAndOthersCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=amx_CteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=amx_ThreePointFiveMegaHertzFrequencyBandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=amx_TwoPointOneMegaHertzFrequencyBandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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