XML 196 R180.htm IDEA: XBRL DOCUMENT
v3.19.1

Income Taxes - Schedule of Changes in Balance of Tax Loss Carryforwards (Detail) - MXN ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Major components of tax expense (income) [abstract] |  |
Balance at beginning of the period | $ 29,487 | $ 27,452
Reserved | (306) |
Additions | 4,124 | 5,673
Usage of tax losses | (1,385) | (3,157)
Translation effect of beginning balances | (1,979) | (481)
Balance at end of the period | $ 29,941 | $ 29,487

X
- Definition Deferred tax assets operating loss carry forwards. + References No definition available. + Details
Name: | fmx_DeferredTaxAssetsOperatingLossCarryForwards1
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Deferred tax assets operating loss carry forwards additions. + References No definition available. + Details
Name: | fmx_DeferredTaxAssetsOperatingLossCarryForwardsAdditions
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred tax assets operating loss carry forwards foreign currency translation. + References No definition available. + Details
Name: | fmx_DeferredTaxAssetsOperatingLossCarryForwardsForeignCurrencyTranslation
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred tax assets operating loss carry forwards provisions. + References No definition available. + Details
Name: | fmx_DeferredTaxAssetsOperatingLossCarryForwardsProvisions
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Deferred tax assets operating loss carry forwards usage of tax losses. + References No definition available. + Details
Name: | fmx_DeferredTaxAssetsOperatingLossCarryForwardsUsageOfTaxLosses
Namespace Prefix: | fmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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