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Other Current Assets and Other Current Financial Assets - Other Current Assets (Details) - MXN ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Current assets [abstract] |  |
Prepaid expenses | $ 3,331 | $ 3,953
Agreements with customers, net of accumulated amortization | 126 | 208
Licenses | 233 | 247
Other | 127 | 70
Other current assets | $ 3,817 | $ 4,478

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- Definition Agreement with customers. + References No definition available. + Details
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Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Licenses, Current + References No definition available. + Details
Name: | fmx_LicensesCurrent
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Other current assets other. + References No definition available. + Details
Name: | fmx_OtherCurrentAssetsOther
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition The amount recognised as a current asset for expenditures made prior to the period when the economic benefit will be realised. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of current assets that the entity does not separately disclose in the same statement or note. [Refer: Current assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant