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Right of use assets and lease debt - Schedule of maturity of lease liabilities (Detail) $ in Thousands, $ in Millions | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 USD ($) | Jan. 01, 2019 MXN ($)
--- | --- | --- | ---
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Short term | $ 25,894,711 | $ 1,374 |
Long term | 94,702,022 | $ 5,025 |
Total | 120,596,733 |  | $ 119,387,660
Maturity analysis | 120,596,733 |  |
Within one year [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Maturity analysis | 25,894,711 |  |
After one year but not more than five years [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Maturity analysis | 80,981,832 |  |
More than five years [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Maturity analysis | $ 13,720,190 |  |

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- Definition Undiscounted operating lease payments payable. + References No definition available. + Details
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Namespace Prefix: | amx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
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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
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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of non-current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Details
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- Details
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- Details
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