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v3.25.1

Other Current Assets and Other Current Financial Assets - Restricted Cash Pledged (Details) - MXN ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Other Current Assets and Other Current Financial Assets |  |
Restricted cash | $ 349 | $ 304
U.S. dollars |  |
Other Current Assets and Other Current Financial Assets |  |
Restricted cash | $ 349 | $ 304

X
- Definition Current restricted cash. + References No definition available. + Details
Name: | fmx_CurrentRestrictedCash
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disclosure of restricted cash and cash equivalents line items. + References No definition available. + Details
Name: | fmx_DisclosureOfRestrictedCashAndCashEquivalentsLineItems
Namespace Prefix: | fmx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |