MEXICAN ECONOMIC DEVELOPMENT INC (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	1001 - Document - Document and Entity Information	Network	*	*	http://www.femsa.com/taxonomy/role/DocumentandEntityInformation
2	Document Information [Table]	Table	*	*	dei:DocumentInformationTable
3	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
4	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
5	BD units [member]	Member			fmx:CommonSharesOutstandingBDUnitsMember
6	B units [member]	Member			fmx:CommonSharesOutstandingBUnitsMember
7	Document Information [Line Items]	LineItems			dei:DocumentInformationLineItems
8	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
9	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
10	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
11	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
12	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
13	Trading Symbol	Concept (Text/String)	For Period		dei:TradingSymbol
14	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
15	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
16	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
17	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
18	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
19	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
20	Entity Emerging Growth Company	Concept (Yes/No)	For Period		dei:EntityEmergingGrowthCompany
21	Entity Shell Company	Concept (Yes/No)	For Period		dei:EntityShellCompany
22	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
23	1003 - Statement - Consolidated Statements of Financial Position	Network	*	*	http://www.femsa.com/taxonomy/role/StatementOfFinancialPositionCurrentNonCurrent-210000
24	Implied Table	Table	*	*	implied:Table
25	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
26	Assets	Abstract			ifrs-full:AssetsAbstract
27	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
28	Investments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentInvestments
29	Trade accounts receivables, net	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
30	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
31	Recoverable taxes	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
32	Other current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
33	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentNonfinancialAssets
34	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
35	NON CURRENT ASSETS	Abstract			ifrs-full:NoncurrentAssetsAbstract
36	Equity accounted investees	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
37	Property, plant and equipment, net	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
38	Intangible assets, net	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
39	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
40	Other non-current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
41	Other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentNonfinancialAssets
42	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
43	TOTAL ASSETS	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
44	LIABILITIES AND EQUITY	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
45	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
46	Bank loans and notes payable	Concept (Monetary)	As Of	Credit	fmx:CurrentPortionOfBankLoansAndNotesPayable
47	Current portion of non-current debt	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
48	Interest payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentInterestPayable
49	Trade payable	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
50	Accounts payable	Concept (Monetary)	As Of	Credit	fmx:AccountsPayable
51	Taxes payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
52	Other current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentFinancialLiabilities
53	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
54	NON-CURRENTLIABILITIES	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
55	Bank loans and notes payable	Concept (Monetary)	As Of	Credit	fmx:NonCurrentPortionOfBankLoansAndNotesPayable
56	Post-employment benefits	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisionsForEmployeeBenefits
57	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
58	Other non-current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentFinancialLiabilities
59	Provisions and other non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
60	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
61	TOTAL LIABILITIES	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
62	EQUITY	Abstract			ifrs-full:EquityAbstract
63	Capital stock	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
64	Additional paid-in capital	Concept (Monetary)	As Of	Credit	ifrs-full:AdditionalPaidinCapital
65	Retained earnings	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
66	Other comprehensive income	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedOtherComprehensiveIncome
67	Total controlling interest	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
68	Non-controlling interest	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
69	TOTAL EQUITY	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
70	TOTAL LIABILITIES AND EQUITY	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
71	1004 - Statement - Consolidated Income Statements	Network	*	*	http://www.femsa.com/taxonomy/role/StatementOfComprehensiveIncomeProfitOrLossByNatureOfExpense-320000
72	Statement [table]	Table	*	*	fmx:StatementTable
73	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
74	Ordinary shares [member]	Member			ifrs-full:OrdinarySharesMember
75	Series B shares [member]	Member			fmx:SeriesBSharesMember
76	Series D shares [member]	Member			fmx:SeriesDSharesMember
77	Statement [LineItems]	LineItems			fmx:StatementLineItems
78	Net sales	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoods
79	Other operating revenues	Concept (Monetary)	For Period	Credit	ifrs-full:OtherRevenue
80	Total revenues	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
81	Cost of goods sold	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
82	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
83	Administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AdministrativeExpense
84	Selling expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SalesAndMarketingExpense
85	Other income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
86	Other expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByFunction
87	Interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
88	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:InvestmentIncome
89	Foreign exchange (loss) gain, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
90	Monetary position gain, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
91	Market value (loss) gain on financial instruments	Concept (Monetary)	For Period	Credit	fmx:MarketValueGainLossOnFinancialInstruments
92	Income before income taxes from continuing operations and share of profit in equity accounted investees	Concept (Monetary)	For Period	Credit	fmx:IncomeLossBeforeIncomeTaxesAndShareOfTheProfitOfAssociatesAndJointVenturesAccountedForUsingTheEquityMethod
93	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
94	Share of the profit of equity accounted investees, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
95	Net income from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
96	Net income from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
97	CONSOLIDATED NET INCOME	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
98	Controlling interest from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeFromContinuingOperationsAttributableToOwnersOfParent
99	Controlling interest from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent
100	Non-controlling interest from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperationsAttributableToNoncontrollingInterests
101	Non-controlling interest from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperationsAttributableToNoncontrollingInterests
102	CONSOLIDATED NET INCOME	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
103	Basic earnings per share of continuing operations	Abstract			fmx:BasicEarningsPerShareFromContinuingOperationsAbstract
104	Basic earnings per share of continuing operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromContinuingOperations
105	Basic earnings per share of discontinued operations	Abstract			fmx:BasicEarningsPerShareFromDiscontinuedOperationsAbstract
106	Basic earnings per share of discontinued operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromDiscontinuedOperations
107	Diluted earnings per share of continuing operations	Abstract			fmx:DilutedEarningsPerShareFromContinuingOperationsAbstract
108	Diluted earnings per share of continuing operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromContinuingOperations
109	Diluted earnings per share of discontinued operations	Abstract			fmx:DilutedEarningsPerShareFromDiscontinuedOperationsAbstract
110	Diluted earnings per share of discontinued operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromDiscontinuedOperations
111	1005 - Statement - Consolidated Statements of Comprehensive Income	Network	*	*	http://www.femsa.com/taxonomy/role/StatementOfComprehensiveIncomeOCIComponentsPresentedNetOfTax-410000
112	Implied Table	Table	*	*	implied:Table
113	Statement of comprehensive income [abstract]	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
114	Consolidated net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
115	Items that will be reclassified to consolidated net income, net of tax:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
116	Valuation of the effective portion of derivative financial instruments	Concept (Monetary)	For Period	Credit	fmx:ValuationOfEffectivePortionOfDerivativeFinancialInstrumentsNetOfTax
117	Income (loss) on hedge of a net investment in foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax
118	Exchange differences on the translation of foreign operations and equity accounted investees	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
119	Share of other comprehensive loss of equity accounted investees	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
120	Total items that will be reclassified	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
121	Items that will not to be reclassified to consolidated net income in subsequent periods, net of tax:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
122	Loss due to changes in the fair value in equity financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
123	Share of other comprehensive income (loss) of equity accounted investees	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax
124	Remeasurements of the net defined benefit liability	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
125	Total items that will not be reclassified	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
126	Other items of comprehensive (loss) income, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
127	Consolidated comprehensive income, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
128	Controlling interest comprehensive income	Concept (Monetary)	For Period	Credit	fmx:ComprehensiveIncomeAttributableToOwnersOfParentBeforeReattributionToNoncontrollingInterest
129	Reattribution to non-controlling interest of other comprehensive income by acquisition of Vonpar	Concept (Monetary)	For Period	Debit	fmx:ReattributionToNoncontrollingInterestOfOtherComprehensiveIncomeByAcquisition
130	Controlling interest comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
131	Non-controlling interest comprehensive income	Concept (Monetary)	For Period	Credit	fmx:ComprehensiveIncomeAttributableToNoncontrollingInterestsReattributionFromControllingInterest
132	Reattribution from controlling interest of other comprehensive income by acquisition of Vonpar	Concept (Monetary)	For Period	Credit	fmx:ReattributionFromControllingInterestOfOtherComprehensiveIncomeByAcquisition
133	Non-controlling interest comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
134	Consolidated comprehensive income, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
135	Controlling comprehensive income from continuing operations, net of tax	Concept (Monetary)	For Period	Credit	fmx:ComprehensiveIncomeNetOfTaxFromContinuingOperations
136	Controlling comprehensive income from discontinued operations, net of tax	Concept (Monetary)	For Period	Credit	fmx:ComprehensiveIncomeNetOfTaxFromDiscontinuingOperations
137	Non-controlling comprehensive income from continuing operations, net of tax	Concept (Monetary)	For Period	Credit	fmx:ComprehensiveIncomeAttributableToNoncontrollingInterestsFromContinuingOperations
138	Non-controlling comprehensive income from discontinued operations, net of tax	Concept (Monetary)	For Period	Credit	fmx:ComprehensiveIncomeAttributableToNoncontrollingInterestsFromDiscontinuingOperations
139	1006 - Statement - Consolidated Statements of Changes in Equity	Network	*	*	http://www.femsa.com/taxonomy/role/StatementOfChangesInEquity-610000
140	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
141	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
142	Equity [member]	Member			ifrs-full:EquityMember
143	Capital stock [member]	Member			ifrs-full:IssuedCapitalMember
144	Additional paid-in capital [member]	Member			ifrs-full:AdditionalPaidinCapitalMember
145	Retained earnings [member]	Member			ifrs-full:RetainedEarningsMember
146	Fair value in equity financial instrument [member]	Member			ifrs-full:FinancialAssetsAtFairValueMember
147	Valuation of the effective portion of derivative financial instrument [member]	Member			fmx:ValuationOfEffectivePortionOfDerivativeFinancialInstrumentMember
148	Exchange differences on the translation of foreign operations and equity accounted investees [member]	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
149	Remeasurements of the net defined benefit liability [member]	Member			ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember
150	Total controlling interest [member]	Member			ifrs-full:EquityAttributableToOwnersOfParentMember
151	Non-controlling interest [member]	Member			ifrs-full:NoncontrollingInterestsMember
152	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
153	Currently stated [member]	Member			ifrs-full:RestatedMember
154	Accounting standard adoption effects [member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
155	IAS 29 [member]	Member			fmx:IAS29Member
156	Adjusted balance [member]	Member			fmx:AdjustedBalanceMember
157	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
158	Beginning Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
159	Consolidated net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
160	Other comprehensive income (loss), net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
161	Total other comprehensive income (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
162	Dividends declared and paid	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
163	Issuance (purchase) of share-based compensation plans	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
164	Other equity instruments from acquisition of Vonpar	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
165	Capitalization of issued shares to former owners of Vonpar in Coca-Cola FEMSA	Concept (Monetary)	For Period	Debit	fmx:CapitalisationOfIssuedSharesToFormerOwners
166	Other acquisitions and remeasurements	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
167	Acquisitions of non-controlling interest	Concept (Monetary)	For Period	Debit	fmx:AcquisitionsOfNoncontrollingInterest
168	Contribution from non-controlling interest	Concept (Monetary)	For Period	Credit	fmx:ContributionsFromNonControllingInterest
169	Recognition of non-controlling interest upon consolidation of CCFPI	Concept (Monetary)	For Period	Credit	fmx:RecognitionOfNoncontrollingInterestUponConsolidation
170	Derecognition upon disposal of controlling interest in Philippines	Concept (Monetary)	For Period	Debit	fmx:DerecognitionOfNoncontrollingInterestUponDisposal
171	Recycling from net defined benefit liability on partial disposal of equity accounted investees	Concept (Monetary)	For Period	Credit	fmx:RecyclingFromNetDefinedBenefitLiabilityOnPartialDisposalOfEquityAccountedInvestees
172	Other movements in equity accounted investees, net of tax	Concept (Monetary)	For Period	Credit	fmx:IncreaseDecreaseThroughChangeInEquityMethodOfAssociates
173	Ending Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
174	1007 - Statement - Consolidated Statements of Cash Flows	Network	*	*	http://www.femsa.com/taxonomy/role/StatementOfCashFlowsIndirectMethod-520000
175	Implied Table	Table	*	*	implied:Table
176	Statement of cash flows [abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
177	OPERATING ACTIVITIES	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
178	Income before income taxes from discontinued operations	Concept (Monetary)	For Period	Credit	fmx:ProfitLossBeforeTaxDiscontinuedOperations1
179	Income before income taxes from continuing operations	Concept (Monetary)	For Period	Credit	fmx:ProfitLossBeforeTaxContinuedOperations
180	Non-cash items adjustments:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
181	Operating expenses	Concept (Monetary)	For Period	Debit	fmx:AdjustmentsForNonCashOperatingExpenses
182	Non-operating expenses	Concept (Monetary)	For Period	Debit	fmx:AdjustmentsForNonCashNonoperatingIncomeExpenses
183	Depreciation	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationExpense
184	Amortization	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForAmortisationExpense
185	Gain on sale of long-lived assets	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
186	(Gain) loss on sale of shares	Concept (Monetary)	For Period	Credit	fmx:AdjustmentForGainLossOnSaleOfShares
187	Disposal of long-lived assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
188	Impairment of long-lived assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
189	Share of the profit of equity accounted investees, net of taxes	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod
190	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForInterestIncome
191	Interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForInterestExpense
192	Foreign exchange loss (gain), net	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
193	Monetary position (gain) loss, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
194	Market value loss (gain) on financial instruments	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForFairValueGainsLosses
195	Net cash flow from operating activities before changes in operating accounts	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
196	Trade accounts receivable and other current assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
197	Other current financial assets	Concept (Monetary)	For Period	Debit	fmx:AdjustmentsForIncreaseDecreaseInOtherFinancialAssets
198	Inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
199	Derivative financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives
200	Trade accounts payable and other accounts	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
201	Other non-current liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInOtherLiabilities
202	Other current financial liabilities	Concept (Monetary)	For Period	Debit	fmx:AdjustmentsForIncreaseDecreaseInOtherCurrentFinancialLiabilities
203	Employee benefits paid	Concept (Monetary)	For Period	Credit	fmx:EmployeeBenefitPaidClassifiedAsOperatingActivities
204	Net cash generated from operations	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
205	Income taxes paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
206	Net cash generated by operating activities from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations
207	Net cash generated by operating activities from continuing operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesContinuingOperations
208	INVESTING ACTIVITIES	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
209	Proceeds from the sale of subsidiary, net of cash disposed	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
210	Acquisition of Coca-Cola FEMSA, net of cash acquired (see Note 4)	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
211	Deconsolidation in Coca-Cola FEMSA Venezuela (see Note 3.3)	Concept (Monetary)	For Period	Debit	fmx:NetCashOutflowFromDeconsolidation
212	Partial payment of Vonpar, net	Concept (Monetary)	For Period	Credit	fmx:CashFlowsUsedInObtainingPartialOwnershipInBusinessesClassifiedAsInvestingActivities
213	Other acquisitions, net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherCashPaymentsToAcquireEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities
214	Equity accounted investees	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod
215	Partial disposal of investment in Heineken Group	Concept (Monetary)	For Period	Debit	fmx:ProceedsFromPartialDisposalOfInvestment
216	Purchase of investments	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
217	Proceeds from investments	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
218	Interest received	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsInvestingActivities
219	Derivative financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities
220	Dividends received from equity accounted investees	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceivedClassifiedAsInvestingActivities
221	Property, plant and equipment acquisitions	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
222	Disposal of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
223	Acquisition of intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
224	Investment in other assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities
225	Collections of other assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities
226	Investment in other financial assets	Concept (Monetary)	For Period	Credit	fmx:PurchaseOfOtherFinancialAssetsClassifiedAsInvestingActivities
227	Collection in other financial assets	Concept (Monetary)	For Period	Debit	fmx:ProceedsFromOtherFinancialAssetsClassifiedAsInvestingActivities
228	Net cash (used in) generated by investing activities from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations
229	Net cash (used in) generated by investing activities from continuing operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivitiesContinuingOperations
230	FINANCING ACTIVITIES	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
231	Proceeds from borrowings	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
232	Payments of bank loans	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfNoncurrentBorrowings
233	Interest paid	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsFinancingActivities
234	Derivative financial instruments	Concept (Monetary)	For Period	Credit	fmx:DerivativeFinancialInstrumentsClassifiedAsFinancingActivities
235	Dividends paid	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities
236	Acquisition of non-controlling interest	Concept (Monetary)	For Period	Credit	fmx:PaymentForAcquisitionOfNoncontrollingInterest
237	Other financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
238	Financing from Vonpar's acquisition	Concept (Monetary)	For Period	Debit	fmx:FinancingFromAcquisition
239	Net cash used in financing activities from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations
240	Net cash (used) generated by financing activities from continuing operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivitiesContinuingOperations
241	(Decrease) increase in cash and cash equivalents from continuing operations	Concept (Monetary)	For Period	Debit	fmx:IncreaseDecreaseInCashAndCashEquivalentsContinuedOperations
242	Increase in cash and cash equivalents from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations
243	Cash and cash equivalents at the beginning of the period	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
244	Effects of exchange rate changes and inflation effects on cash and cash equivalents held in foreign currencies	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
245	Cash and cash equivalents at the end of the period	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
246	1008 - Disclosure - Company business	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfParentEntityInformationExplanatory
247	Implied Table	Table	*	*	implied:Table
248	Text block [abstract]	Abstract			fmx:TextBlockAbstract
249	Company business	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfParentEntityInformationExplanatory
250	1009 - Disclosure - Basis of Preparation	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
251	Implied Table	Table	*	*	implied:Table
252	Text block [abstract]	Abstract			fmx:TextBlockAbstract
253	Basis of Preparation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
254	1010 - Disclosure - Significant Accounting Policies	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
255	Implied Table	Table	*	*	implied:Table
256	Text block [abstract]	Abstract			fmx:TextBlockAbstract
257	Significant Accounting Policies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
258	1011 - Disclosure - Mergers, Acquisitions and Disposals	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBusinessCombinationsExplanatory
259	Implied Table	Table	*	*	implied:Table
260	Text block [abstract]	Abstract			fmx:TextBlockAbstract
261	Mergers, Acquisitions and Disposals	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBusinessCombinationsExplanatory
262	1012 - Disclosure - Cash and Cash Equivalents	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatory
263	Implied Table	Table	*	*	implied:Table
264	Text block [abstract]	Abstract			fmx:TextBlockAbstract
265	Cash and Cash Equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
266	1013 - Disclosure - Investments	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory
267	Implied Table	Table	*	*	implied:Table
268	Text block [abstract]	Abstract			fmx:TextBlockAbstract
269	Investments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory
270	1014 - Disclosure - Trade Accounts Receivable, Net	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherReceivablesExplanatory
271	Implied Table	Table	*	*	implied:Table
272	Text block [abstract]	Abstract			fmx:TextBlockAbstract
273	Trade Accounts Receivable, Net	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
274	1015 - Disclosure - Inventories	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatory
275	Implied Table	Table	*	*	implied:Table
276	Text block [abstract]	Abstract			fmx:TextBlockAbstract
277	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
278	1016 - Disclosure - Other Current Assets and Other Current Financial Assets	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherCurrentAssetsAndOtherFinancialAssetsExplanatory
279	Implied Table	Table	*	*	implied:Table
280	Text block [abstract]	Abstract			fmx:TextBlockAbstract
281	Other Current Assets and Other Current Financial Assets	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOtherCurrentAssetsAndOtherFinancialAssetsExplanatory
282	1017 - Disclosure - Equity Accounted Investees	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
283	Implied Table	Table	*	*	implied:Table
284	Text block [abstract]	Abstract			fmx:TextBlockAbstract
285	Equity Accounted Investees	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
286	1018 - Disclosure - Property, Plant and Equipment, Net	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatory
287	Implied Table	Table	*	*	implied:Table
288	Text block [abstract]	Abstract			fmx:TextBlockAbstract
289	Property, Plant and Equipment, Net	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
290	1019 - Disclosure - Intangible Assets	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsExplanatory
291	Implied Table	Table	*	*	implied:Table
292	Text block [abstract]	Abstract			fmx:TextBlockAbstract
293	Intangible Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
294	1020 - Disclosure - Other Assets and Other Financial Assets	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherAssetsAndOtherFinancialAssetsExplanatory
295	Implied Table	Table	*	*	implied:Table
296	Text block [abstract]	Abstract			fmx:TextBlockAbstract
297	Other Assets and Other Financial Assets	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOtherAssetsAndOtherFinancialAssetsExplanatory
298	1021 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesExplanatory
299	Implied Table	Table	*	*	implied:Table
300	Text block [abstract]	Abstract			fmx:TextBlockAbstract
301	Balances and Transactions with Related Parties and Affiliated Companies	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesExplanatory
302	1022 - Disclosure - Balances and Transactions in Foreign Currencies	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory
303	Implied Table	Table	*	*	implied:Table
304	Text block [abstract]	Abstract			fmx:TextBlockAbstract
305	Balances and Transactions in Foreign Currencies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory
306	1023 - Disclosure - Employee Benefits	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatory
307	Implied Table	Table	*	*	implied:Table
308	Text block [abstract]	Abstract			fmx:TextBlockAbstract
309	Employee Benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
310	1024 - Disclosure - Bonus Programs	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSharebasedPaymentArrangementsExplanatory
311	Implied Table	Table	*	*	implied:Table
312	Text block [abstract]	Abstract			fmx:TextBlockAbstract
313	Bonus Programs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
314	1025 - Disclosure - Bank Loans and Notes Payable	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBorrowingsExplanatory
315	Implied Table	Table	*	*	implied:Table
316	Text block [abstract]	Abstract			fmx:TextBlockAbstract
317	Bank Loans and Notes Payable	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
318	1026 - Disclosure - Other Income and Expenses	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherIncomeAndExpensesExplanatory
319	Implied Table	Table	*	*	implied:Table
320	Text block [abstract]	Abstract			fmx:TextBlockAbstract
321	Other Income and Expenses	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOtherIncomeAndExpensesExplanatory
322	1027 - Disclosure - Financial Instruments	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatory
323	Implied Table	Table	*	*	implied:Table
324	Text block [abstract]	Abstract			fmx:TextBlockAbstract
325	Financial Instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
326	1028 - Disclosure - Non-ControllingInterest in Consolidated Subsidiaries	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfNoncontrollingInterestsExplanatory
327	Implied Table	Table	*	*	implied:Table
328	Text block [abstract]	Abstract			fmx:TextBlockAbstract
329	Non-ControllingInterest in Consolidated Subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNoncontrollingInterestsExplanatory
330	1029 - Disclosure - Equity	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
331	Implied Table	Table	*	*	implied:Table
332	Text block [abstract]	Abstract			fmx:TextBlockAbstract
333	Equity	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
334	1030 - Disclosure - Earnings per Share	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatory
335	Implied Table	Table	*	*	implied:Table
336	Text block [abstract]	Abstract			fmx:TextBlockAbstract
337	Earnings per Share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
338	1031 - Disclosure - Income Taxes	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatory
339	Implied Table	Table	*	*	implied:Table
340	Text block [abstract]	Abstract			fmx:TextBlockAbstract
341	Income Taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
342	1032 - Disclosure - Other Liabilities, Provisions, Contingencies and Commitments	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory
343	Implied Table	Table	*	*	implied:Table
344	Text block [abstract]	Abstract			fmx:TextBlockAbstract
345	Other Liabilities, Provisions, Contingencies and Commitments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsContingentLiabilitiesAndContingentAssetsExplanatory
346	1033 - Disclosure - Information by Segment	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntitysReportableSegmentsExplanatory
347	Implied Table	Table	*	*	implied:Table
348	Text block [abstract]	Abstract			fmx:TextBlockAbstract
349	Information by Segment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
350	1034 - Disclosure - Revenues	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRevenueFromContractsWithCustomersExplanatory
351	Implied Table	Table	*	*	implied:Table
352	Text block [abstract]	Abstract			fmx:TextBlockAbstract
353	Revenues	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueFromContractsWithCustomersExplanatory
354	1035 - Disclosure - Future Impact of Recently Issued Accounting Standards not yet in Effect	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFirstTimeAdoptionExplanatory
355	Implied Table	Table	*	*	implied:Table
356	Text block [abstract]	Abstract			fmx:TextBlockAbstract
357	Future Impact of Recently Issued Accounting Standards not yet in Effect	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFirstTimeAdoptionExplanatory
358	1036 - Disclosure - Subsequent Events	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEventsAfterReportingPeriodExplanatory
359	Implied Table	Table	*	*	implied:Table
360	Text block [abstract]	Abstract			fmx:TextBlockAbstract
361	Subsequent Events	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
362	1037 - Disclosure - Significant Accounting Policies (Policies)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryPolicies
363	Implied Table	Table	*	*	implied:Table
364	Text block [abstract]	Abstract			fmx:TextBlockAbstract
365	Basis of consolidation	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatory
366	Business combinations	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
367	Foreign currencies, consolidation of foreign subsidiaries and accounting equity accounted investees	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForForeignCurrenciesConsolidationOfForeignSubsidiariesAndAccountingEquityAccountedInvesteesExplanatory
368	Recognition of the effects of inflation in countries with hyperinflationary economic environments	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForRecognitionOfEffectsOfInflationInCountriesWithHyperinflationaryEconomicEnvironmentsExplanatory
369	Cash and cash equivalents and restricted cash	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory
370	Investments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory
371	Financial assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory
372	Other financial assets	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForOtherFinancialAssetsExplanatory
373	Derivative financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory
374	Fair value measurement	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory
375	Inventories and cost of goods sold	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForInventoriesAndCostOfGoodsSoldExplanatory
376	Loans and receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLoansAndReceivablesExplanatory
377	Other current assets	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForOtherCurrentAssetsExplanatory
378	Equity accounted investees	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory
379	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
380	Borrowing costs	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory
381	Intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
382	Non-current assets held for sale and discontinued operations	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
383	Impairment of long-lived assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
384	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
385	Financial liabilities and equity instruments	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForFinancialLiabilitiesAndEquityInstrumentsExplanatory
386	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
387	Post-employment and other long-term employee benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
388	Revenue recognition	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
389	Administrative and selling expenses	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForAdministrativeAndSellingExpensesExplanatory
390	Income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
391	Share-based payments arrangements	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
392	Earnings per share	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
393	Issuance of subsidiary common shares	Concept (Text Block (HTML))	For Period		fmx:DescriptionOfAccountingPolicyForIssuanceOfSubsidiaryStockExplanatory
394	1038 - Disclosure - Company business (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfParentEntityInformationExplanatoryTables
395	Implied Table	Table	*	*	implied:Table
396	Text block [abstract]	Abstract			fmx:TextBlockAbstract
397	Summary of Significant Investments in Subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
398	1039 - Disclosure - Significant Accounting Policies (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryTables
399	Implied Table	Table	*	*	implied:Table
400	Text block [abstract]	Abstract			fmx:TextBlockAbstract
401	Disclosure of Exchange Rates of Local Currencies Translated to Mexican Pesos	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfChangesInForeignExchangeRatesExplanatory
402	Disclosure of Recognition of Effects of Inflation in Countries with Hyperinflationary Economic Environments	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailInformationAboutEffectsOfInflationInHyperinflationaryEconomicEnvironmentExplanatory
403	Disclosure of Estimated Useful Lives of Company's Assets	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfFixedAssetsWithEstimatedUsefulLifeExplanatory
404	1040 - Disclosure - Mergers, Acquisitions and Disposals (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBusinessCombinationsExplanatoryTables
405	Statement [table]	Table	*	*	fmx:StatementTable
406	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
407	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
408	CCFPI [member]	Member			fmx:CocaColaFEMSAPhilippinesIncMember
409	Vonpar [member]	Member			fmx:VonparMember
410	Other acquisitions [member]	Member			ifrs-full:AggregatedIndividuallyImmaterialBusinessCombinationsMember
411	Other acquisitions [member]	Member			fmx:OtherAcquisitionsMember
412	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
413	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
414	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
415	Statement [LineItems]	LineItems			fmx:StatementLineItems
416	Summary of Preliminary Estimate of Fair Value of Net Assets Acquired and Reconciliation of Cash Flows	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
417	Summary of Selected Income Statement for Period from Acquisition Date	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfIncomeStatementOfSignificantAssociateExplanatory
418	Summary of Selected Income Statement Information Related to Business Acquisition	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfSelectedIncomeStatementInformationRelatedToBusinessCombinationExplanatory
419	Summary of Unaudited Pro Forma Financial Information	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfUnauditedProFormaFinancialDataExplanatory
420	Summary of Income Statement of Discontinued Operations	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsExplanatory
421	1041 - Disclosure - Cash and Cash Equivalents (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatoryTables
422	Implied Table	Table	*	*	implied:Table
423	Text block [abstract]	Abstract			fmx:TextBlockAbstract
424	Schedule of Cash and Cash Equivalents	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailedInformationOfCashAndCashEquivalentsExplanatory
425	1042 - Disclosure - Investments (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatoryTables
426	Implied Table	Table	*	*	implied:Table
427	Text block [abstract]	Abstract			fmx:TextBlockAbstract
428	Schedule of Investments Classified as Amortized Cost	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfInvestmentsClassifiedAsAmortizedCostExplanatory
429	1043 - Disclosure - Trade Accounts Receivable, Net (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAndOtherReceivablesExplanatoryTables
430	Statement [table]	Table	*	*	fmx:StatementTable
431	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
432	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
433	Trade receivables [member]	Member			ifrs-full:TradeReceivablesMember
434	Statement [LineItems]	LineItems			fmx:StatementLineItems
435	Disclosure of Accounts Receivable, Net	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsExplanatory
436	Disclosure of Aging of Accounts Receivable (Days Current or Outstanding)	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedExplanatory
437	Disclosure of Changes in Allowance for Expected Credit Losses	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAllowanceForCreditLossesExplanatory
438	1044 - Disclosure - Inventories (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatoryTables
439	Implied Table	Table	*	*	implied:Table
440	Text block [abstract]	Abstract			fmx:TextBlockAbstract
441	Summary of Inventories	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailedInformationAboutInventoriesExplanatory
442	Summary of Changes in Inventories	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfChangesInInventoriesExplanatory
443	1045 - Disclosure - Other Current Assets and Other Current Financial Assets (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherCurrentAssetsAndOtherFinancialAssetsExplanatoryTables
444	Implied Table	Table	*	*	implied:Table
445	Text block [abstract]	Abstract			fmx:TextBlockAbstract
446	Summary of Other Current Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
447	Summary of Prepaid Expenses	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailedInformationAboutPrepaidExpensesExplanatory
448	Summary of Other Current Financial Assets	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOtherCurrentFinancialAssetsExplanatory
449	Summary of Carrying of Restricted Cash Pledged	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRestrictedCashAndCashEquivalentsExplanatory
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452	Text block [abstract]	Abstract			fmx:TextBlockAbstract
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454	Summarized Financial Information in Respect of Associate Accounted for Under Equity Method	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesExplanatory
455	Reconciliation from Equity of Associate to Investment of Company	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfSummarisedFinancialInformationOfAssociateAccountedForUsingEquityMethodToCarryingAmountOfInterestInAssociateExplanatory
456	Schedule of Company's Share of Other Comprehensive Income from Equity Investees, Net of Taxes	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfEntitysShareOfOtherComprehensiveIncomeFromEquityInvesteesExplanatory
457	1047 - Disclosure - Property, Plant and Equipment, Net (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatoryTables
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459	Text block [abstract]	Abstract			fmx:TextBlockAbstract
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461	Summary of Interest Expense, Interest Income and Net Foreign Exchange Losses and Gains	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfInterestIncomeExpenseAndForeignExchangeGainsLossesExplanatory
462	1048 - Disclosure - Intangible Assets (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsExplanatoryTables
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466	FEMSA Comercio - Health Division [member]	Member			fmx:HealthDivisionMember
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469	Schedule of Allocation of Amortization Expenses	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfAllocationOfAmortisationExpensesExplanatory
470	Summary of Average Remaining Period for Company's Intangible Assets Subject to Amortization	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
471	Disclosure of Aggregate Carrying Amounts of Goodwill and Distribution Rights Allocated to Each CGU	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
472	Details of Key Assumptions by CGU for Impairment Test	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailedInformationAboutKeyAssumptionsByCguForImpairmentTestExplanatory
473	Disclosure of Detailed Information About Sensitivity to Changes in Assumptions	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailedInformationAboutSensitivityToChangesInAssumptionsExplanatory
474	1049 - Disclosure - Other Assets and Other Financial Assets (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherAssetsAndOtherFinancialAssetsExplanatoryTables
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476	Text block [abstract]	Abstract			fmx:TextBlockAbstract
477	Disclosure of Other Non-Current Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherAssetsExplanatory
478	Disclosure of Other Non-Current Financial Assets	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOtherNonCurrentFinancialAssetsExplanatory
479	1050 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesExplanatoryTables
480	Implied Table	Table	*	*	implied:Table
481	Text block [abstract]	Abstract			fmx:TextBlockAbstract
482	Summary of Balances and Transactions with Related Parties and Affiliated Companies	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfSummaryOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesExplanatory
483	Summary of Transaction with Related Parties	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
484	Commitments with Related Parties	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfCommitmentsWithRelatedPartiesExplanatory
485	Schedule of Key Management Remuneration	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
486	1051 - Disclosure - Balances and Transactions in Foreign Currencies (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEffectOfChangesInForeignExchangeRatesExplanatoryTables
487	Implied Table	Table	*	*	implied:Table
488	Text block [abstract]	Abstract			fmx:TextBlockAbstract
489	Summary of Assets, Liabilities and Transactions in Foreign Currencies	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfBalancesAndTransactionsInForeignCurrenciesExplanatory
490	Summary of Exchange Rates	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfExchangeRatesExplanatory
491	1052 - Disclosure - Employee Benefits (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatoryTables
492	Statement [table]	Table	*	*	fmx:StatementTable
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494	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
495	Discount rates [member]	Member			ifrs-full:ActuarialAssumptionOfDiscountRatesMember
496	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
497	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
498	Present value of defined benefit obligation [member]	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
499	Statement [LineItems]	LineItems			fmx:StatementLineItems
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501	Summary of Defined Benefit Plan Expected Future Benefit Payments	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDefinedBenefitPlanExpectedFutureBenefitPaymentsExplanatory
502	Summary of Balances of the Liabilities for Employee Benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
503	Summary of Trust Assets	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfTrustAssetExplanatory
504	Summary of Amounts and Types of Securities in Related Parties Included in Portfolio Fund	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfAmountsAndTypesOfSecuritiesInRelatedPartiesIncludedInPortfolioFundExplanatory
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507	Summary of Changes in the Balance of the Defined Benefit Obligation for Post-employment	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfChangesInBalanceOfDefinedBenefitObligationForPostemploymentExplanatory
508	Summary of Changes in the Balance of Plan Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
509	Summary of Amount of Defined Benefit Plan Expense and OCI Impact in Absolute Terms of Variation on Net Defined Benefit Liability	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfAmountOfDefinedBenefitPlanExpenseAndOtherComprehensiveIncomeImpactInAbsoluteTermsOfVariationOnNetDefinedBenefitLiabilityExplanatory
510	Summary of Employee Benefit Expenses Recognized in Consolidated Income Statements	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDefinedBenefitPlansExpenseRecognizedInIncomeStatementExplanatory
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515	1054 - Disclosure - Bank Loans and Notes Payable (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBorrowingsExplanatoryTables
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519	Summary of Financial Instruments by Type of Interest Rate	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateExplanatory
520	Summary of Interest Expense	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfInterestExpenseOnBorrowingExplanatory
521	Summary of Liabilities Arising from Financing Activities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
522	1055 - Disclosure - Other Income and Expenses (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherIncomeAndExpensesExplanatoryTables
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526	1056 - Disclosure - Financial Instruments (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatoryTables
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535	Summary of Financial Assets and Liabilities Measured at Fair Value	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
536	Fair Value of Company's Publicly Traded Debt	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialLiabilitiesHeldForTradingExplanatory
537	Disclosure of Outstanding Interest Rate Swap Agreements	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOutstandingInterestRateSwapAgreementsExplanatory
538	Disclosure of Outstanding Forward Agreements to Purchase Foreign Currency	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOutstandingForwardAgreementsToPurchaseForeignCurrencyExplanatory
539	Summary of Outstanding Colar Options to Purchase Foreign Currency	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOutstandingCollarToPurchaseForeignCurrencyTextBlock
540	Disclosure of Outstanding Cross Currency Swap Agreements	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfCrossCurrencySwapContractExplanatory
541	Disclosure of Fair Value of Commodity Price Contracts	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfFairValueOfCommodityPriceContractsExplanatory
542	Disclosure of Net Effects of Expired Contracts Met Hedging Criteria	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfNetEffectsOfExpiredContractsThatMetHedgingCriteriaExplanatory
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544	Disclosure of Sensitivity Analysis of Market Risks Management	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsExplanatory
545	Summary of Sensitivity Analysis of Interest Rate Risks Management	Concept (Text Block (HTML))	For Period		ifrs-full:ExplanationOfRiskManagementStrategyRelatedToHedgeAccountingExplanatory
546	Summary of Maturity Analysis for Non-derivative and Derivative Financial Liabilities	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilitiesExplanatory
547	Summary of Financial Instruments to Hedge Exposure to Foreign Exchange Rates and Interest Rates	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfFinancialInstrumentsToHedgeExposureToForeignExchangeRatesAndInterestRateExplanatory
548	Summary of Cash Flows Hedge Exposures	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfCashFlowsHedgeExplanatory
549	Summary of Cash Flows Financial Instruments Amounts and Its Related Non-effective Portion	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory
550	Reconciliation Per Category of Equity Components and Analysis of OCI Components, Net of Tax Generated by Cash Flow Hedges	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfReconciliationByRiskCategoryOfComponentsOfEquityAndAnalysisOfOtherComprehensiveIncomeItemsResultingFromHedgeAccountingExplanatory
551	1057 - Disclosure - Non-ControllingInterest in Consolidated Subsidiaries (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfNoncontrollingInterestsExplanatoryTables
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554	Summary of Analysis of FEMSAs Non-Controlling Interest in its Consolidated Subsidiaries	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfNonControllingInterestInItsConsolidatedSubsidiariesExplanatory
555	Summary of Changes in the FEMSA's Non-Controlling Interest	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfChangesInNonControllingInterestExplanatory
556	Summary of Non-Controlling Interest's Accumulated Other Comprehensive Loss	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfDetailedInformationAboutNonControllingInterestCumulativeOtherComprehensiveLossExplanatory
557	Summary of Financial Information of Coca-Cola FEMSA	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfSummarizedFinancialInformationExplanatory
558	1058 - Disclosure - Equity (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatoryTables
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562	Summary of Dividends Declared and Paid	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
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570	Summary of Major Components of Income Tax Expense	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfComponentsOfIncomeTaxExpenseExplanatory
571	Schedule of Recognized in Consolidated Statement of Other Comprehensive Income	Concept (Text Block (HTML))	For Period		fmx:ScheduleOfIncomeTaxRecognizedAsOtherComprehensiveIncomeLossExplanatory
572	Schedule of Domestic Tax Rate	Concept (Text Block (HTML))	For Period		fmx:ScheduleOfDomesticTaxRateExplanatory
573	Schedule of Deferred Income Tax	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
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576	Schedule of Tax Loss Carryforwards	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfTaxLossCarryforwardsExplanatory
577	Summary of Changes in the Balance of Tax Loss Carryforwards	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfChangesInTaxLossCarryforwardsExplanatory
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582	Schedule of Provisions and Other Non-Current Liabilities	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfProvisionsAndOtherLongTermLiabilitiesExplanatory
583	Schedule of Other Financial Liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherLiabilitiesExplanatory
584	Schedule of Provisions Recorded in Consolidated Statement of Financial Position	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfNatureAndAmountOfLossContingenciesExplanatory
585	Summary of Changes in Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProvisionsExplanatory
586	Schedule of Contractual Maturities of Operating Lease Commitments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
587	Schedule of Future Minimum Lease Payments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
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591	Summary of Inter Segment Policies for Segment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
592	Summary of Geographic Disclosure	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
593	1063 - Disclosure - Revenues (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRevenueFromContractsWithCustomersExplanatoryTables
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596	Summary of Disaggregation of Revenue by Geographic Area, Business Unit and Products and Services Categories	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory
597	1064 - Disclosure - Subsequent Events (Tables)	Network	*	*	http://www.femsa.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEventsAfterReportingPeriodExplanatoryTables
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601	Schedule of Outstanding Shares Immediately after Stock Split	Concept (Text Block (HTML))	For Period		fmx:DisclosureOfOutstandingSharesImmediatelyAfterStockSplitExplanatory
602	1065 - Disclosure - Company Business - Summary of Significant Investments in Subsidiaries (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureCompanyBusinessSummaryOfSignificantInvestmentsInSubsidiaries
603	Disclosure Of Parent Entity Information [table]	Table	*	*	fmx:DisclosureOfParentEntityInformationTable
604	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
605	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
606	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
607	S.A.B. de C.V. and subsidiaries [member]	Member			fmx:SabDeCvAndSubsidiariesMember
608	FEMSA Comercio - Proximity Division [member]	Member			fmx:ProximityDivisionMember
609	FEMSA Comercio - Fuel Division [member]	Member			fmx:FuelDivisionMember
610	FEMSA Comercio - Health Division [member]	Member			fmx:HealthDivisionMember
611	Heineken investment [member]	Member			fmx:HeinekenInvestmentMember
612	Other businesses [member]	Member			fmx:OtherBusinessesMember
613	Disclosure Of Parent Entity Information [line items]	LineItems			fmx:DisclosureOfParentEntityInformationLineItems
614	Percentage of ownership in subsidiary	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
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620	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
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622	Farmacias Yza [member]	Member			fmx:FarmaciasYzaMember
623	Grupo Socofar [member]	Member			fmx:GrupoSocofarMember
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652	Mexico [member]	Member			country:MX
653	Brazil [member]	Member			country:BR
654	Argentina [member]	Member			country:AR
655	Colombia [member]	Member			country:CO
656	Guatemala [member]	Member			country:GT
657	Costa Rica [member]	Member			country:CR
658	Nicaragua [member]	Member			country:NI
659	Panama [member]	Member			country:PA
660	Uruguay [member]	Member			country:UY
661	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
662	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
663	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
664	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
665	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
666	Heineken [member]	Member			fmx:HeinekenGroupMember
667	Entity Listings, Exchange [Axis]	Axis			dei:EntityListingsExchangeAxis
668	Exchange [Domain]	Member			dei:ExchangeDomain
669	DIPRO [member]	Member			fmx:DIPROMember
670	DICOM [member]	Member			fmx:DICOMMember
671	Range [axis]	Axis			ifrs-full:RangeAxis
672	Ranges [member]	Member			ifrs-full:RangesMember
673	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
674	Top of range [member]	Member			ifrs-full:TopOfRangeMember
675	Biological assets by type [axis]	Axis			ifrs-full:BiologicalAssetsByTypeAxis
676	Biological assets, type [member]	Member			ifrs-full:BiologicalAssetsTypeMember
677	PET bottles [member]	Member			fmx:PETBottlesMember
678	Glass bottles [member]	Member			fmx:GlassBottlesMember
679	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
680	Property, plant and equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
681	Information technology and management system costs [member]	Member			fmx:InformationTechnologyAndManagementSystemCostsMember
682	Long-term alcohol licenses [member]	Member			fmx:LongTermAlcoholLicensesMember
683	Disclosure of significant accounting policies [line items]	LineItems			fmx:DisclosureOfSignificantAccountingPoliciesLineItems
684	Goodwill recognized	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
685	Sale percentage of investment	Concept (Percent)	For Period		fmx:BusinessAcquisitionSaleOfEquityInterestPercentage
686	Other comprehensive income to consolidated net income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
687	Other expenses amount	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByNature
688	Other expense reclassification	Concept (Monetary)	For Period	Debit	fmx:ReclassificationAdjustments
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690	Impairment charge	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
691	Distribution rights	Concept (Monetary)	As Of	Debit	ifrs-full:LicencesAndFranchises
692	Net sale	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoods
693	Losses	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
694	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
695	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
696	Liabilities recorded using exchange rate	Concept (Monetary)	As Of	Credit	fmx:ForeignExchangeLiabilities
697	Exchange rate	Concept (Decimal)	As Of		ifrs-full:ClosingForeignExchangeRate
698	Description of identity of price index	Concept (Text/String)	For Period		ifrs-full:IdentityOfPriceIndex
699	Cumulative inflation percentage	Concept (Percent)	For Period		fmx:EffectOfCumulativeInflationPercentageRecognised
700	Cumulative inflation period	Concept (Text/String)	For Period		fmx:EffectOfCumulativeInflationRecognitionPeriod
701	Recognized interest income on loans and receivables	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnLoansAndReceivables
702	Amortization expense	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
703	Estimated useful lives	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
704	Estimated useful lives	Concept (xbrli:durationItemType)	For Period		fmx:UsefulLivesPropertyPlantAndEquipment
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706	Automatic renewable term	Concept (xbrli:durationItemType)	For Period		fmx:IntangibleAssetsRenewableTerm
707	Impairment recognized	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
708	Gain or loss recognized in profit or loss	Concept (Monetary)	For Period		ifrs-full:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementEntitysOwnEquityInstruments
709	Minimum year of service for retirement benefits	Concept (Decimal)	For Period		fmx:MinimumYearOfServiceForRetirementBenefits
710	Minimum age for retirement benefits	Concept (Integer)	For Period		fmx:MinimumAgeForRetirementBenefits
711	Minimum wages or salary for service	Concept (xbrli:durationItemType)	For Period		fmx:MinimumWagesOrServiceForService
712	Maximum wages or salary for service	Concept (xbrli:durationItemType)	For Period		fmx:MaximumWagesOrServiceForService
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714	Profit sharing computation ratio on income	Concept (Percent)	For Period		fmx:ProfitSharingComputationPercentageOnTaxableIncome
715	Income tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
716	1069 - Disclosure - Significant Accounting Policies - Disclosure of Exchange Rates of Local Currencies Translated to Mexican Pesos (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureSignificantAccountingPoliciesDisclosureOfExchangeRatesOfLocalCurrenciesTranslatedToMexicanPesos
717	Disclosure of significant accounting policies [table]	Table	*	*	fmx:DisclosureOfSignificantAccountingPoliciesTable
718	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
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720	Guatemala [member]	Member			country:GT
721	Costa Rica [member]	Member			country:CR
722	Panama [member]	Member			country:PA
723	Colombia [member]	Member			country:CO
724	Nicaragua [member]	Member			country:NI
725	Argentina [member]	Member			country:AR
726	Venezuela [member]	Member			country:VE
727	Brazil [member]	Member			country:BR
728	Chile [member]	Member			country:CL
729	Euro Zone [member]	Member			fmx:EuroZoneMember
730	Peru [member]	Member			country:PE
731	Ecuador [member]	Member			country:EC
732	Philippines [member]	Member			country:PH
733	Uruguay [member]	Member			country:UY
734	Currency [Axis]	Axis			srt:CurrencyAxis
735	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
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737	Costa Rica, Colon [member]	Member			currency:CRC
738	U S dollar [member]	Member			currency:USD
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740	Nicaragua, Cordoba [member]	Member			currency:NIO
741	Argentine peso [member]	Member			currency:ARS
742	Venezuelan bolivar fuerte [member]	Member			currency:VEF
743	Brazilian reais [member]	Member			currency:BRL
744	Chilean peso [member]	Member			currency:CLP
745	Euro [member]	Member			currency:EUR
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747	Philippine peso [member]	Member			currency:PHP
748	Uruguay Peso en Unidades Indexadas (UPUI) [member]	Member			currency:UYI
749	Disclosure of significant accounting policies [line items]	LineItems			fmx:DisclosureOfSignificantAccountingPoliciesLineItems
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753	1070 - Disclosure - Significant Accounting Policies - Disclosure of Recognition of Effects of Inflation in Countries with Hyperinflationary Economic Environments (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureSignificantAccountingPoliciesDisclosureOfRecognitionOfEffectsOfInflationInCountriesWithHyperinflationaryEconomicEnvironments
754	Disclosure of Hyperinflationary Reporting [table]	Table	*	*	fmx:DisclosureOfHyperinflationaryReportingTable
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758	2015 - 2017 [member]	Member			fmx:TwoThousandFifteenToTwoThousandSeventeenMember
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760	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
761	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
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763	Guatemala [member]	Member			country:GT
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765	Panama [member]	Member			country:PA
766	Colombia [member]	Member			country:CO
767	Nicaragua [member]	Member			country:NI
768	Argentina [member]	Member			country:AR
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770	Brazil [member]	Member			country:BR
771	Philippines [member]	Member			country:PH
772	Euro Zone [member]	Member			fmx:EuroZoneMember
773	Chile [member]	Member			country:CL
774	Peru [member]	Member			country:PE
775	Ecuador [member]	Member			country:EC
776	Uruguay [member]	Member			country:UY
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780	1071 - Disclosure - Significant Accounting Policies - Disclosure of Estimated Useful Lives of Company's Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureSignificantAccountingPoliciesDisclosureOfEstimatedUsefulLivesOfCompanysAssets
781	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
782	Range [axis]	Axis			ifrs-full:RangeAxis
783	Ranges [member]	Member			ifrs-full:RangesMember
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785	Top of range [member]	Member			ifrs-full:TopOfRangeMember
786	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
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792	Returnable bottles [member]	Member			fmx:ReturnableBottlesMember
793	Leasehold improvements [member]	Member			ifrs-full:LeaseholdImprovementsMember
794	Information technology equipment [member]	Member			fmx:InformationTechnologyEquipmentMember
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796	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
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798	1072 - Disclosure - Mergers, Acquisitions and Disposals - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureMergersAcquisitionsAndDisposalsAdditionalInformation
799	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
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801	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
802	CCFPI [member]	Member			fmx:CocaColaFEMSAPhilippinesIncMember
803	Vonpar [member]	Member			fmx:VonparMember
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806	Specialtys Cafe and Bakery Inc [member]	Member			fmx:SpecialtysCafeAndBakeryIncorporationMember
807	Comercial Big John Limitada [member]	Member			fmx:ComercialBigJohnLimitadaMember
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810	Open market [member]	Member			fmx:OpenMarketMember
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816	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
817	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
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832	Promissory notes [member]	Member			fmx:PromissoryNotesMember
833	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
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868	1073 - Disclosure - Mergers, Acquisitions and Disposals - Summary of Purchase Price to Fair Value of Net Assets Acquired and Reconciliation of Cash Flows (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureMergersAcquisitionsAndDisposalsSummaryOfPurchasePriceToFairValueOfNetAssetsAcquiredAndReconciliationOfCashFlows
869	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
870	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
871	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
872	CCFPI [member]	Member			fmx:CocaColaFEMSAPhilippinesIncMember
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876	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
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878	Distribution rights [member]	Member			fmx:DistributionRights1Member
879	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
880	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
881	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
882	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
883	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssetsRecognisedAsOfAcquisitionDate
884	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsRecognisedAsOfAcquisitionDate
885	Total assets	Concept (Monetary)	As Of	Debit	fmx:AssetsRecognisedAsOfAcquisitionDate
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891	Net cash paid	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
892	Intangible assets recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
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901	1074 - Disclosure - Mergers, Acquisitions and Disposals - Summary of Selected Income Statement Information Related to Business Acquisition (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureMergersAcquisitionsAndDisposalsSummaryOfSelectedIncomeStatementInformationRelatedToBusinessAcquisition
902	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
903	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
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916	1075 - Disclosure - Mergers, Acquisitions and Disposals - Summary of Purchase Price to Fair Value of Net Assets Acquired and Reconciliation of Cash Flows (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureMergersAcquisitionsAndDisposalsSummaryOfPurchasePriceToFairValueOfNetAssetsAcquiredAndReconciliationOfCashFlowsParenthetical
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924	Intangible assets [Member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
925	Distribution rights [member]	Member			fmx:DistributionRights1Member
926	Trademark rights [member]	Member			ifrs-full:BrandNamesMember
927	Other [member]	Member			ifrs-full:OtherIntangibleAssetsMember
928	Fair Value Adjustments [axis]	Axis			fmx:FairValueAdjustmentsAxis
929	Fair Value Adjustments [domain]	Member			fmx:FairValueAdjustmentsDomain
930	Effect of acquisition [member]	Member			fmx:EffectOfAcquisitionMember
931	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
932	Non-controlling majority stake acquired	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
933	Cash acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
934	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsRecognisedAsOfAcquisitionDate
935	Intangible assets recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:CustomerrelatedIntangibleAssetsRecognisedAsOfAcquisitionDate
936	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
937	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
938	Intangible assets recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
939	Other liabilities as of acquisition date	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate
940	1076 - Disclosure - Mergers, Acquisitions and Disposals - Summary of Unaudited Pro Forma Financial Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureMergersAcquisitionsAndDisposalsSummaryOfUnauditedProFormaFinancialInformation
941	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
942	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
943	Ordinary shares [member]	Member			ifrs-full:OrdinarySharesMember
944	Series B 1 [member]	Member			fmx:SeriesB1Member
945	Series D [member]	Member			fmx:SeriesDMember
946	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
947	Total revenues	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfCombinedEntity
948	Income before income taxes and share of the profit of equity accounted investees	Concept (Monetary)	For Period	Credit	fmx:BusinessCombinationProformaIncomeBeforeIncomeTaxesAndShareOfTheProfitOfEquityAccountedInvestees
949	Net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfCombinedEntity
950	Basic net controlling interest income per share	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
951	1077 - Disclosure - Mergers, Acquisitions and Disposals - Summary of Income Statement of Discontinued Operations (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureMergersAcquisitionsAndDisposalsSummaryOfIncomeStatementOfDiscontinuedOperations
952	Disclosure of analysis of single amount of discontinued operations [table]	Table	*	*	ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsTable
953	Continuing and discontinued operations [axis]	Axis			ifrs-full:ContinuingAndDiscontinuedOperationsAxis
954	Continuing operations [member]	Member			ifrs-full:ContinuingOperationsMember
955	Discontinued operations [member]	Member			ifrs-full:DiscontinuedOperationsMember
956	Disclosure of analysis of single amount of discontinued operations [line items]	LineItems			ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsLineItems
957	Total revenues	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
958	Cost of goods sold	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
959	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
960	Operating expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OperatingExpense
961	Other expenses, net	Concept (Monetary)	For Period	Credit	fmx:OtherProductsExpensesNet
962	Financial income, net	Concept (Monetary)	For Period	Debit	fmx:FinancialExpensesIncomeNet
963	Foreign exchange gain, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
964	Income before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
965	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
966	Net income for discontinued operations before currency translation effect for the subsidiary disposal and the gain from the sale	Concept (Monetary)	For Period	Credit	fmx:NetIncomeForDiscontinuedOperationsBeforeCurrencyTranslationEffectForSubsidiaryDisposalAndGainFromSales
967	Less: non-controlling interest in discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperationsAttributableToNoncontrollingInterests
968	Controlling interest in discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
969	Accumulated currency translation effect for the subsidiary disposal	Concept (Monetary)	For Period	Credit	fmx:AccumulatedCurrencyTranslationEffectForTheSubsidiaryDisposal
970	Gain from sale	Concept (Monetary)	For Period	Credit	fmx:GainLossRecognizedFromDiscontinuedOperations
971	Net income for subsidiary disposal - controlling interest	Concept (Monetary)	As Of	Credit	fmx:NetIncomeForSubsidiaryDisposalControllingInterest
972	Net income for discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
973	1078 - Disclosure - Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureCashAndCashEquivalentsScheduleOfCashAndCashEquivalents
974	Implied Table	Table	*	*	implied:Table
975	Cash and cash equivalents [abstract]	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
976	Cash and bank balances	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
977	Cash equivalents (see Note 3.5)	Concept (Monetary)	As Of	Debit	ifrs-full:CashEquivalents
978	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
979	1079 - Disclosure - Cash and Cash Equivalents - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureCashAndCashEquivalentsAdditionalInformation
980	Cash And Cash Equivalents [table]	Table	*	*	fmx:CashAndCashEquivalentsTable
981	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
982	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
983	Venezuela [member]	Member			country:VE
984	Cash and cash equivalents1 [line items]	LineItems			fmx:CashAndCashEquivalents1LineItems
985	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
986	1080 - Disclosure - Investments - Schedule of Investments Classified as Amortized Cost (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInvestmentsScheduleOfInvestmentsClassifiedAsAmortizedCost
987	Disclosure Of Investments [table]	Table	*	*	fmx:DisclosureOfInvestmentsTable
988	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
989	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
990	Fixed rate debt [member]	Member			ifrs-full:FixedInterestRateMember
991	Variable rate debt [member]	Member			ifrs-full:FloatingInterestRateMember
992	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
993	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
994	US Government agencies debt securities [member]	Member			fmx:UsGovernmentAgenciesDebtSecuritiesMember
995	Corporate debt securities [member]	Member			fmx:CorporateDebtSecurities1Member
996	Disclosure Of Investments [line items]	LineItems			fmx:DisclosureOfInvestmentsLineItems
997	Acquisition cost	Concept (Monetary)	As Of	Debit	fmx:AcquisitionCost
998	Accrued interest	Concept (Monetary)	As Of	Credit	fmx:AccruedInterest
999	Total fixed rate/variable rate	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentHeldtomaturityInvestments
1000	Total investments	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentInvestments
1001	1081 - Disclosure - Trade Accounts Receivable, Net - Disclosure of Trade Accounts Receivable, Net (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureTradeAccountsReceivableNetDisclosureOfTradeAccountsReceivableNet
1002	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1003	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1004	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1005	The Coca-Cola company [member]	Member			fmx:CocaColaCompanyMember
1006	Heineken [member]	Member			fmx:HeinekenGroupMember
1007	Former Shareholders Vonpar [member]	Member			fmx:FormerShareholdersVonparMember
1008	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1009	Trade accounts receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
1010	Receivables from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
1011	Loans to employees	Concept (Monetary)	As Of	Debit	fmx:CurrentLoansToEmployees
1012	Others	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
1013	Allowance for expected credit losses	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1014	Trade accounts receivable, Net	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
1015	1082 - Disclosure - Trade Accounts Receivable, Net - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureTradeAccountsReceivableNetAdditionalInformation
1016	Disclosure of Accounts receivable [table]	Table	*	*	fmx:DisclosureOfAccountsReceivableTable
1017	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1018	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1019	The Coca-Cola company [member]	Member			fmx:CocaColaCompanyMember
1020	Range [axis]	Axis			ifrs-full:RangeAxis
1021	Ranges [member]	Member			ifrs-full:RangesMember
1022	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1023	Disclosure Of Accounts Receivable [line items]	LineItems			fmx:DisclosureOfAccountsReceivableLineItems
1024	Percentage of unrecoverable trade accounts receivables	Concept (Percent)	For Period		fmx:PercentageOfUnrecoverableTradeAccountsReceivables
1025	Expected credit loss percentage	Concept (Percent)	As Of		ifrs-full:ExpectedCreditLossRate
1026	Contributions from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
1027	1083 - Disclosure - Trade Accounts Receivable, Net - Disclosure of Aging of Accounts Receivable (Days Current or Outstanding) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureTradeAccountsReceivableNetDisclosureOfAgingOfAccountsReceivableDaysCurrentOrOutstanding
1028	Disclosure of financial assets that are either past due or impaired [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable
1029	Past due status [axis]	Axis			ifrs-full:PastDueStatusAxis
1030	Past due status [member]	Member			ifrs-full:PastDueStatusMember
1031	Current [member]	Member			ifrs-full:CurrentMember
1032	0-30 days [member]	Member			ifrs-full:NotLaterThanOneMonthMember
1033	31-60 days [member]	Member			ifrs-full:LaterThanOneMonthAndNotLaterThanTwoMonthsMember
1034	60-90 days [member]	Member			ifrs-full:LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember
1035	90-120 days [member]	Member			ifrs-full:LaterThanThreeMonthsAndNotLaterThanFourMonthsMember
1036	120+ days [member]	Member			ifrs-full:LaterThanFourMonthsMember
1037	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1038	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1039	Trade receivables [member]	Member			ifrs-full:TradeReceivablesMember
1040	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
1041	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1042	Financial assets past due but not impaired [member]	Member			ifrs-full:FinancialAssetsPastDueButNotImpairedMember
1043	Disclosure of financial assets that are either past due or impaired [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems
1044	Accounts receivable , days current or outstanding	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1045	1084 - Disclosure - Trade Accounts Receivable, Net - Disclosure of Changes in Allowance for Expected Credit Losses (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureTradeAccountsReceivableNetDisclosureOfChangesInAllowanceForExpectedCreditLosses
1046	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1047	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1048	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1049	Trade receivables [member]	Member			ifrs-full:TradeReceivablesMember
1050	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1051	Balance at the beginning of the period	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1052	Effect of adoption of IFRS 9	Concept (Monetary)	For Period	Credit	fmx:IncreaseDecreaseDueToTheAdoptionOfIFRS9
1053	Adjusted balance at the beginning of the period	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInAllowanceAccountForCreditLossesOfFinancialAssets
1054	Allowance for the period	Concept (Monetary)	For Period		ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
1055	Additions (write-offs) of uncollectible accounts	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughAdjustmentsArisingFromPassageOfTimeAllowanceAccountForCreditLossesOfFinancialAssets
1056	Addition from business combinations	Concept (Monetary)	For Period	Credit	fmx:AdditionsFromBusinessCombinationsTradeReceivables
1057	Effects of changes in foreign exchange rates	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets
1058	Effect of Venezuela deconsolidation	Concept (Monetary)	For Period	Credit	fmx:DeconsolidationEffectReductionOfAssetsPropertyPlantAndEquipmentGross
1059	Balance at the end of the period	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1060	1085 - Disclosure - Trade Accounts Receivable, Net - Disclosure of Changes in Allowance for Expected Credit Losses (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureTradeAccountsReceivableNetDisclosureOfChangesInAllowanceForExpectedCreditLossesParenthetical
1061	Implied Table	Table	*	*	implied:Table
1062	Reconciliation of changes in allowance account for credit losses of financial assets [abstract]	Abstract			ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
1063	Sale of Coca-Cola FEMSA Philippines, Inc	Concept (Monetary)	For Period	Debit	fmx:ProceedsFromDisposalOfBusiness
1064	1086 - Disclosure - Inventories - Summary of Inventories (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInventoriesSummaryOfInventories
1065	Implied Table	Table	*	*	implied:Table
1066	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1067	Finished products	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
1068	Raw materials	Concept (Monetary)	As Of	Debit	ifrs-full:RawMaterials
1069	Spare parts	Concept (Monetary)	As Of	Debit	ifrs-full:SpareParts
1070	Work in process	Concept (Monetary)	As Of	Debit	ifrs-full:WorkInProgress
1071	Inventories in transit	Concept (Monetary)	As Of	Debit	ifrs-full:Merchandise
1072	Other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherInventories
1073	Total inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1074	1087 - Disclosure - Inventories - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInventoriesAdditionalInformation
1075	Implied Table	Table	*	*	implied:Table
1076	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1077	Inventory write-downs	Concept (Monetary)	For Period		ifrs-full:InventoryWritedown2011
1078	1088 - Disclosure - Inventories - Summary of Changes in Inventories (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInventoriesSummaryOfChangesInInventories
1079	Implied Table	Table	*	*	implied:Table
1080	Classes of current inventories [abstract]	Abstract			ifrs-full:ClassesOfInventoriesAbstract
1081	Changes in inventories of finished goods and work in progress	Concept (Monetary)	For Period	Debit	ifrs-full:ChangesInInventoriesOfFinishedGoodsAndWorkInProgress
1082	Raw materials and consumables used	Concept (Monetary)	For Period	Debit	ifrs-full:RawMaterialsAndConsumablesUsed
1083	Total	Concept (Monetary)	As Of	Debit	ifrs-full:InventoriesTotal
1084	1089 - Disclosure - Other Current Assets and Other Current Financial Assets - Summary of Other Current Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherCurrentAssetsAndOtherCurrentFinancialAssetsSummaryOfOtherCurrentAssets
1085	Implied Table	Table	*	*	implied:Table
1086	Disclosure Of Other Current Assets [abstract]	Abstract			fmx:DisclosureOfOtherCurrentAssetsAbstract
1087	Prepaid expenses	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepaidExpenses
1088	Recoverable taxes	Concept (Monetary)	As Of	Debit	fmx:CurrentRecoverableTaxes
1089	Agreements with customers	Concept (Monetary)	As Of	Debit	fmx:AgreementWithCustomers
1090	Licenses	Concept (Monetary)	As Of	Debit	fmx:Licenses
1091	Other	Concept (Monetary)	As Of	Debit	fmx:OtherCurrentAssetsOther
1092	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
1093	1090 - Disclosure - Other Current Assets and Other Current Financial Assets - Summary of Prepaid Expenses (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherCurrentAssetsAndOtherCurrentFinancialAssetsSummaryOfPrepaidExpenses
1094	Implied Table	Table	*	*	implied:Table
1095	Disclosure Of Prepaid Expense Current [abstract]	Abstract			fmx:DisclosureOfPrepaidExpenseCurrentAbstract
1096	Advances for inventories	Concept (Monetary)	As Of	Debit	fmx:AdvancesForInventories
1097	Advertising and promotional expenses paid in advance	Concept (Monetary)	As Of	Debit	fmx:AdvertisingAndPromotionalExpensesPaidInAdvance
1098	Advances to service suppliers	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAdvancesToSuppliers
1099	Prepaid leases	Concept (Monetary)	As Of	Debit	fmx:PrepaidLeases
1100	Prepaid insurance	Concept (Monetary)	As Of	Debit	fmx:PrepaidInsurance1
1101	Others	Concept (Monetary)	As Of	Debit	fmx:OtherPrepaidExpenses
1102	Current prepaid expenses	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepaidExpenses
1103	1091 - Disclosure - Other Current Assets and Other Financial Assets - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherCurrentAssetsAndOtherFinancialAssetsAdditionalInformation
1104	Implied Table	Table	*	*	implied:Table
1105	Disclosure of carrying amount and value in use of investments in associates and joint ventures [abstract]	Abstract			fmx:DisclosureOfCarryingAmountAndValueInUseOfInvestmentsInAssociatesAndJointVenturesAbstract
1106	Prepaid advertising and promotional expenses	Concept (Monetary)	As Of	Debit	fmx:PrepaidAdvertisingAndPromotionalExpenses
1107	1092 - Disclosure - Other Current Assets and Other Current Financial Assets - Summary of Other Current Financial Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherCurrentAssetsAndOtherCurrentFinancialAssetsSummaryOfOtherCurrentFinancialAssets
1108	Implied Table	Table	*	*	implied:Table
1109	Disclosure Of Other Current Financial Assets [abstract]	Abstract			fmx:DisclosureOfOtherCurrentFinancialAssetsAbstract
1110	Restricted cash	Concept (Monetary)	As Of	Debit	fmx:CurrentRestrictedCash
1111	Derivative financial instruments (see Note 20)	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentDerivativeFinancialAssets
1112	Note receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivables
1113	Other current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
1114	1093 - Disclosure - Other Current Assets and Other Current Financial Assets - Summary of Carrying of Restricted Cash Pledged (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherCurrentAssetsAndOtherCurrentFinancialAssetsSummaryOfCarryingOfRestrictedCashPledged
1115	Disclosure of Restricted Cash and Cash Equivalents [table]	Table	*	*	fmx:DisclosureOfRestrictedCashAndCashEquivalentsTable
1116	Currency [Axis]	Axis			srt:CurrencyAxis
1117	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1118	Brazilian reais [member]	Member			fmx:BrazilianReaisMember
1119	Colombian pesos [member]	Member			fmx:ColombianPesosMember
1120	Chilean pesos [member]	Member			fmx:ChileanPesosMember
1121	Disclosure of Restricted Cash and Cash Equivalents [line items]	LineItems			fmx:DisclosureOfRestrictedCashAndCashEquivalentsLineItems
1122	Current restricted cash	Concept (Monetary)	As Of	Debit	fmx:CurrentRestrictedCash
1123	1094 - Disclosure - Equity Accounted Investees - Summary of Equity Accounted Investees (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAccountedInvesteesSummaryOfEquityAccountedInvestees
1124	Disclosure of Investments in Associates and Joint Ventures [table]	Table	*	*	fmx:DisclosureOfInvestmentsInAssociatesAndJointVenturesTable
1125	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1126	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1127	FEMSA Comercio [member]	Member			fmx:FEMSAComercioMember
1128	Other investments [member]	Member			fmx:OtherInvestmentsMember
1129	Heineken [member]	Member			fmx:HeinekenGroupMember
1130	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1131	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1132	Compania Panamena de Bebidas, S.A.P.I. de C.V. [member]	Member			fmx:CompaniaPanamenaDeBebidasSAPIDeCVMember
1133	Dispensadoras de Cafe, S.A.P.I. de C.V. [member]	Member			fmx:DispensadorasDeCafeSAPIDeCVMember
1134	Fountain Agua Mineral, LTDA [member]	Member			fmx:FountainAguaMineralLTDAMember
1135	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1136	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1137	Promotora Industrial Azucarera, S.A. de C.V. ("PIASA") [member]	Member			fmx:PromotoraIndustrialAzucareraSADeCVPIASAMember
1138	Industria Envasadora De Queretaro SA De CVIEQSA [member]	Member			fmx:IndustriaEnvasadoraDeQueretaroSADeCVIEQSAMember
1139	Industria Mexicana de Reciclaje, S.A. de C.V. ("IMER") [member]	Member			fmx:IndustriaMexicanaDeReciclajeSADeCVIMERMember
1140	Jugos del Valle, S.A.P.I. de C.V. [member]	Member			fmx:JugosDelValleSAPIDeCVMember
1141	KSP Participacoes LTDA [member]	Member			fmx:KSPParticipacoesLTDAMember
1142	Leao Alimentos e Bebidas, LTDA [member]	Member			fmx:LeaoAlimentosEBebidasLTDAMember
1143	UBI 3 Participacoes, LTDA [member]	Member			fmx:UBI3ParticipacoesLTDAMember
1144	Other Investments In Coca Cola FEMSAs Companies [member]	Member			fmx:OtherInvestmentsInCocaColaFEMSAsCompaniesMember
1145	Cafe Del Pacifico SAPI De CV Caffenio [member]	Member			fmx:CafeDelPacificoSAPIDeCVCaffenioMember
1146	Disclosure of Investments in Associates and Joint Ventures [line items]	LineItems			fmx:DisclosureOfInvestmentsInAssociatesAndJointVenturesLineItems
1147	Joint ventures	Concept (Text/String)	For Period		ifrs-full:NameOfAssociate
1148	Principal Activity	Concept (Text/String)	For Period		ifrs-full:DescriptionOfNatureOfEntitysRelationshipWithAssociate
1149	Place of Incorporation	Concept (Text/String)	For Period		ifrs-full:CountryOfIncorporationOrResidenceOfAssociate
1150	Ownership Percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1151	Carrying Value	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
1152	Joint ventures	Concept (Text/String)	For Period		ifrs-full:NameOfJointVenture
1153	Principal Activity	Concept (Text/String)	For Period		ifrs-full:DescriptionOfNatureOfEntitysRelationshipWithJointVenture
1154	Place of Incorporation	Concept (Text/String)	For Period		ifrs-full:CountryOfIncorporationOfJointVenture
1155	Ownership Percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
1156	1095 - Disclosure - Equity Accounted Investees - Summary of Equity Accounted Investees (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAccountedInvesteesSummaryOfEquityAccountedInvesteesParenthetical
1157	Disclosure of Investments in Associates and Joint Ventures [table]	Table	*	*	fmx:DisclosureOfInvestmentsInAssociatesAndJointVenturesTable
1158	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1159	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1160	Caffenio [member]	Member			fmx:CaffenioMember
1161	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1162	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1163	Heineken Company [member]	Member			fmx:HeinekenNVMember
1164	Heineken Holding N.V. [member]	Member			fmx:HeinekenHoldingNVMember
1165	Heineken [member]	Member			fmx:HeinekenGroupMember
1166	Disclosure of Investments in Associates and Joint Ventures [line items]	LineItems			fmx:DisclosureOfInvestmentsInAssociatesAndJointVenturesLineItems
1167	Proportion of ownership interest in associate	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1168	Percentage of stake acquired	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
1169	Percentage of ownership interest	Concept (Percent)	As Of		fmx:PercentageOfOwnershipInterest
1170	1096 - Disclosure - Equity Accounted Investees - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAccountedInvesteesAdditionalInformation
1171	Disclosure of Investments in Subsidiaries Joint Ventures and Associates [table]	Table	*	*	fmx:DisclosureOfInvestmentsInSubsidiariesJointVenturesAndAssociatesTable
1172	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1173	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1174	AdeS [member]	Member			fmx:AdeSMember
1175	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1176	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1177	Leao Alimentos e Bebidas, LTDA [member]	Member			fmx:LeaoAlimentosEBebidasLTDAMember
1178	Industria Envasadora de Quertaro, S.A. de C.V. (IEQSA) [member]	Member			fmx:IndustriaEnvasadoraDeQuertaroDeIeqsaMember
1179	Promotora Industrial Azucarera, S.A. de C.V. ("PIASA") [member]	Member			fmx:PromotoraIndustrialAzucareraSADeCVPIASAMember
1180	Heineken [member]	Member			fmx:HeinekenGroupMember
1181	Heineken Company [member]	Member			fmx:HeinekenNVMember
1182	Heineken Holding N.V. [member]	Member			fmx:HeinekenHoldingNVMember
1183	Jugos del Valle, S.A.P.I. de C.V. [member]	Member			fmx:JugosDelValleSAPIDeCVMember
1184	UBI 3 Participacoes, LTDA [member]	Member			fmx:UBI3ParticipacoesLTDAMember
1185	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1186	Non-adjusting Events After Reporting Period [Member]	Member			ifrs-full:NonadjustingEventsMember
1187	Actuarial assumption of retirement age [member]	Member			ifrs-full:ActuarialAssumptionOfRetirementAgeMember
1188	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1189	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1190	Promotora Mexicana de Embotelladores, S.A. de C.V. [member]	Member			fmx:PromotoraMexicanaDeEmbotelladoresSADeCVMember
1191	Compania Panamena de Bebidas, S.A.P.I. de C.V. [member]	Member			fmx:CompaniaPanamenaDeBebidasSAPIDeCVMember
1192	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1193	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1194	Spal Industria Brasileria de Bebidas, S.A.[member]	Member			fmx:SpalIndustriaBrasileriaDeBebidasMember
1195	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
1196	Income Statement Location 1 [axis]	Axis			fmx:IncomeStatementLocation1Axis
1197	Income Statement Location 1 [member]	Member			fmx:IncomeStatementLocationMember
1198	Other expense [member]	Member			fmx:OtherExpenseMember
1199	Disclosure of Investments in Subsidiaries Joint Ventures and Associates [Line items]	LineItems			fmx:DisclosureOfInvestmentsInSubsidiariesJointVenturesAndAssociatesLineItems
1200	Dividends received	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceived
1201	Capital contribution	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1202	Capitalization of borrowing costs	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1203	Impairment loss on investments	Concept (Monetary)	For Period	Debit	fmx:ImpairmentLossOnInvestments
1204	Percentage of interests divested in associate	Concept (Percent)	For Period		fmx:PercentageOfInterestsDivestedInAssociate
1205	Other changes in equity	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
1206	Ownership Percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1207	Portion of investment sold	Concept (Percent)	For Period		fmx:ProportionOfOwnershipInterestSold
1208	Number of shares sold	Concept (Shares)	For Period		fmx:NumberOfOrdinarySharesOfAssociateSold
1209	Share price	Concept (Share)	For Period		fmx:SharePricePerShare
1210	Equity income recognized from ownership interest, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1211	Amortisation expense related to net income attributable to equity holders	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
1212	Fair value of investments in accociates representing 20% of its outstanding shares	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished
1213	Fair value of investment in joint ventures	Concept (Monetary)	As Of	Debit	fmx:FairValueOfInvestmentInJointVentures
1214	Net income corresponding to the immaterial associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
1215	Net income (loss) corresponding to the immaterial joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
1216	1097 - Disclosure - Equity Accounted Investees - Summarized Financial Information in Respect of Associate Accounted for Under Equity Method (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAccountedInvesteesSummarizedFinancialInformationInRespectOfAssociateAccountedForUnderEquityMethod
1217	Disclosure of associates [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1218	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1219	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1220	Heineken [member]	Member			fmx:HeinekenGroupMember
1221	Disclosure of associates and joint ventures [line items]	LineItems			fmx:DisclosureOfAssociatesAndJointVenturesLineItems
1222	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1223	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
1224	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1225	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
1226	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1227	Equity attributable to equity holders	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
1228	Total revenue and other income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueAndOperatingIncome
1229	Total cost and expenses	Concept (Monetary)	For Period	Debit	fmx:CostsAndExpenses1
1230	Net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
1231	Net income attributable to equity holders	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
1232	Other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
1233	Total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
1234	Total comprehensive income attributable to equity holders	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
1235	1098 - Disclosure - Equity Accounted Investees - Reconciliation from Equity of Associate to Investment of Company (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAccountedInvesteesReconciliationFromEquityOfAssociateToInvestmentOfCompany
1236	Disclosure of associates [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1237	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1238	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1239	Heineken [member]	Member			fmx:HeinekenGroupMember
1240	Disclosure of associates and joint ventures [line items]	LineItems			fmx:DisclosureOfAssociatesAndJointVenturesLineItems
1241	Equity attributable to equity holders of Heineken	Concept (Monetary)	As Of	Credit	fmx:EquityAttributableToEquityShareHolders
1242	Economic ownership percentage	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1243	Investment in Heineken investment exclusive of goodwill and other adjustments	Concept (Monetary)	As Of	Debit	fmx:InvestmentsInAssociatesExcludingGoodwillAndOtherAdjustments
1244	Effects of fair value determined by purchase price allocation	Concept (Monetary)	As Of	Debit	fmx:EffectsOfFairValueDeterminedByPurchasePriceAllocation
1245	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1246	Heineken investment	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociates
1247	1099 - Disclosure - Equity Accounted Investees - Schedule of Companys Share of Other comprehensive Income from Equity Investees, Net of Taxes (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAccountedInvesteesScheduleOfCompanysShareOfOtherComprehensiveIncomeFromEquityInvesteesNetOfTaxes
1248	Disclosure Of Entitys Share Of Other Comprehensive Income From Equity Investees [table]	Table	*	*	fmx:DisclosureOfEntitysShareOfOtherComprehensiveIncomeFromEquityInvesteesTable
1249	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1250	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1251	Equity investments [member]	Member			ifrs-full:EquityInvestmentsMember
1252	Disclosure Of Entitys Share Of Other Comprehensive Income From Equity Investees [line items]	LineItems			fmx:DisclosureOfEntitysShareOfOtherComprehensiveIncomeFromEquityInvesteesLineItems
1253	Items that may be reclassified to consolidated net income:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
1254	Valuation of the effective portion of derivative financial instruments	Concept (Monetary)	For Period	Credit	fmx:OtherComprehensiveIncomeNetOfTaxValuationOfEffectivePortionOfDerivativeFinancialInstruments
1255	Exchange differences on translating foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
1256	Total	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
1257	Items that may not be reclassified to consolidated net income in subsequent periods:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
1258	Remeasurements of the net defined benefit liability	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1259	1100 - Disclosure - Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment, Net (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetScheduleOfPropertyPlantAndEquipmentNet
1260	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1261	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1262	Property, plant and equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1263	Land [member]	Member			ifrs-full:LandMember
1264	Buildings [member]	Member			ifrs-full:BuildingsMember
1265	Machinery and equipment [member]	Member			fmx:MachineryAndEquipment1Member
1266	Refrigeration equipment [member]	Member			fmx:RefrigerationEquipmentMember
1267	Returnable bottles [member]	Member			fmx:ReturnableBottlesMember
1268	Investments in Fixed Assets in Progress [member]	Member			fmx:InvestmentsInFixedAssetsInProgressMember
1269	Leasehold improvements [member]	Member			ifrs-full:LeaseholdImprovementsMember
1270	Other [member]	Member			ifrs-full:OtherPropertyPlantAndEquipmentMember
1271	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1272	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1273	Cost [member]	Member			ifrs-full:GrossCarryingAmountMember
1274	Accumulated depreciation, amortisation and impairment [member]	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1275	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1276	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1277	Philippines [member]	Member			country:PH
1278	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1279	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1280	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1281	Depreciation for the year	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
1282	Additions from business acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1283	Changes in fair value of past acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:RevaluationIncreaseDecreasePropertyPlantAndEquipment
1284	Transfer of completed projects in progress	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment
1285	Transfer (to)/from assets classified as held for sale	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersFromToInvestmentPropertyPropertyPlantAndEquipment
1286	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
1287	Effects of changes in foreign exchange rates	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1288	Changes in value on the recognition of inflation effects	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnNetMonetaryPosition
1289	Capitalization of borrowing costs	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1290	Capitalization of borrowing costs	Concept (Monetary)	For Period	Debit	fmx:CapitalizationOfBorrowingCosts
1291	Venezuela deconsolidation effect	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment
1292	Venezuela impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1293	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1294	1101 - Disclosure - Property, Plant and Equipment, Net - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetAdditionalInformation
1295	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1296	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1297	Property, plant and equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1298	Other [member]	Member			ifrs-full:OtherPropertyPlantAndEquipmentMember
1299	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1300	Capitalization of borrowing costs	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1301	Qualifying assets	Concept (Monetary)	As Of	Debit	fmx:QualifyingAssetsCapitalised
1302	Effective interest rate used to determine amount of borrowing costs eligible for capitalization	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1303	1102 - Disclosure - Property, Plant and Equipment, Net - Summary of Interest Expense, Interest Income and Net Foreign Exchange Losses and Gains (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetSummaryOfInterestExpenseInterestIncomeAndNetForeignExchangeLossesAndGains
1304	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1305	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1306	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1307	Property, plant and equipment and intangible assets [member]	Member			fmx:PropertyPlantAndEquipmentAndIntangibleAssetsMember
1308	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1309	Interest expense, interest income and net foreign exchange	Concept (Monetary)	For Period	Debit	fmx:InterestExpenseInterestIncomeAndNetForeignExchangeGainLossesIncurred
1310	Amount capitalized	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1311	Net amount in consolidated income statements	Concept (Monetary)	For Period	Credit	fmx:NonOperatingIncomeExpense1
1312	1103 - Disclosure - Intangible Assets - Summary of Reconciliation of Changes in Intangible Assets and Goodwill (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsSummaryOfReconciliationOfChangesInIntangibleAssetsAndGoodwill
1313	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1314	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1315	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1316	Philippines [member]	Member			country:PH
1317	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1318	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1319	Cost [member]	Member			ifrs-full:GrossCarryingAmountMember
1320	Accumulated depreciation, amortisation and impairment [member]	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1321	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1322	Intangible assets [Member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1323	Right to produce and distribute trademark products [member]	Member			fmx:RightToProduceAndDistributeTrademarkProductsMember
1324	Goodwill [member]	Member			ifrs-full:GoodwillMember
1325	Trademark rights [member]	Member			ifrs-full:BrandNamesMember
1326	Other indefinite lived intangible assets [member]	Member			fmx:OtherIndefiniteLivedIntangibleAssetsMember
1327	Total unamortized intangible assets [member]	Member			fmx:UnamortisedIntangibleAssetsMember
1328	Technology costs and management systems [member]	Member			fmx:TechnologyCostsAndManagementSystemsMember
1329	Systems in Development [member]	Member			ifrs-full:IntangibleAssetsUnderDevelopmentMember
1330	Alcohol licenses [member]	Member			fmx:AlcoholLicensesMember
1331	Other [member]	Member			ifrs-full:OtherIntangibleAssetsMember
1332	Total amortized intangible assets [member]	Member			fmx:AmortisedIntangibleAssetsMember
1333	Disclosure of reconciliation of changes in intangible assets and goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1334	Beginning balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1335	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1336	Amortization expense	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1337	Acquisitions from business combinations (see Note 4)	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1338	Impairment losses	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
1339	Changes in fair value of past acquisitions	Concept (Monetary)	For Period	Debit	ifrs-full:RevaluationIncreaseDecreaseIntangibleAssetsOtherThanGoodwill
1340	Internal development	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill
1341	Transfer of completed development systems	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill
1342	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1343	Effect of movements in exchange rates	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
1344	Changes in value on the recognition of inflation effects	Concept (Monetary)	For Period	Debit	fmx:ChangesInValueOnRecognitionOfInflationEffects
1345	Venezuela deconsolidation effect	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryIntangibleAssetsAndGoodwill
1346	Capitalization of borrowing costs	Concept (Monetary)	For Period	Debit	fmx:CapitalizationOfBorrowingCosts
1347	Venezuela impairment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInOtherComprehensiveIncomeIntangibleAssetsOtherThanGoodwill
1348	Ending balance	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1349	1104 - Disclosure - Intangible Assets - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformation
1350	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1351	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1352	Intangible assets [Member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1353	Other [member]	Member			ifrs-full:OtherIntangibleAssetsMember
1354	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1355	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1356	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1357	Venezuela [member]	Member			country:VE
1358	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1359	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1360	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
1361	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1362	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1363	FEMSA Comercio - Health Division [member]	Member			fmx:HealthDivisionMember
1364	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1365	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1366	Vonpar [member]	Member			fmx:VonparMember
1367	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1368	Borrowing costs capitalized	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1369	Qualifying assets	Concept (Monetary)	As Of	Debit	fmx:QualifyingAssetsCapitalised
1370	Effective interest rate used to determine amount of borrowing costs eligible for capitalization	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1371	Cash acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
1372	Impairment recognized	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1373	Risk premium basis points	Concept (Decimal)	For Period		fmx:RiskPremiumBasisPoints
1374	Total carrying amount of goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1375	Impairment charge on goodwill	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1376	1105 - Disclosure - Intangible Assets - Schedule of Allocation for Amortization Expense (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsScheduleOfAllocationForAmortizationExpense
1377	Implied Table	Table	*	*	implied:Table
1378	Disclosure Of Allocation Of Amortisation Expenses [abstract]	Abstract			fmx:DisclosureOfAllocationOfAmortisationExpensesAbstract
1379	Cost of goods sold	Concept (Monetary)	For Period	Debit	fmx:AmortisationExpenseReportedInCostOfGoodsSold
1380	Administrative expenses	Concept (Monetary)	For Period	Debit	fmx:AmortisationExpenseReportedInAdministrativeExpenses
1381	Selling expenses	Concept (Monetary)	For Period	Debit	fmx:AmortisationExpenseReportedInSellingExpenses
1382	Total	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
1383	1106 - Disclosure - Intangible Assets - Summary of Average Remaining Period for Company's Intangible Assets Subject to Amortization (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsSummaryOfAverageRemainingPeriodForCompanysIntangibleAssetsSubjectToAmortization
1384	Disclosure of intangible assets material to entity [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsMaterialToEntityTable
1385	Range [axis]	Axis			ifrs-full:RangeAxis
1386	Ranges [member]	Member			ifrs-full:RangesMember
1387	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1388	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1389	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1390	Intangible assets [Member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1391	Technology costs and management systems [member]	Member			fmx:TechnologyCostsAndManagementSystemsMember
1392	Alcohol licenses [member]	Member			fmx:AlcoholLicensesMember
1393	Disclosure of intangible assets material to entity [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsMaterialToEntityLineItems
1394	Average Remaining Period Intangible Assets Subject to Amortization	Concept (Decimal)	As Of		ifrs-full:RemainingAmortisationPeriodOfIntangibleAssetsMaterialToEntity
1395	1107 - Disclosure - Intangible Assets - Disclosure of Aggregate Carrying Amounts of Goodwill and Distribution Rights Allocated to Each CGU (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsDisclosureOfAggregateCarryingAmountsOfGoodwillAndDistributionRightsAllocatedToEachCGU
1396	Disclosure of information for cash-generating units [table]	Table	*	*	ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable
1397	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1398	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1399	Mexico [member]	Member			country:MX
1400	Guatemala [member]	Member			country:GT
1401	Nicaragua [member]	Member			country:NI
1402	Costa Rica [member]	Member			country:CR
1403	Panama [member]	Member			country:PA
1404	Colombia [member]	Member			country:CO
1405	Brazil [member]	Member			country:BR
1406	Argentina [member]	Member			country:AR
1407	Uruguay [member]	Member			country:UY
1408	Philippines [member]	Member			country:PH
1409	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1410	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1411	Cash Generating Units [member]	Member			ifrs-full:AggregateNotSignificantIndividualAssetsOrCashgeneratingUnitsMember
1412	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1413	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1414	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
1415	Disclosure of information for cash-generating units [line items]	LineItems			ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
1416	Goodwill and distribution rights allocated	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1417	1108 - Disclosure - Intangible Assets - Details of Key Assumptions by CGU for Impairment Test (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsDetailsOfKeyAssumptionsByCGUForImpairmentTest
1418	Disclosure of information for cash-generating units [table]	Table	*	*	ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable
1419	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1420	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1421	2017 - 2026 [member]	Member			fmx:TwoThousandSeventeenToTwoThousandTwentySixMember
1422	2018 - 2027 [member]	Member			fmx:TwoThousandEighteenToTwoThousandTwentySevenMember
1423	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1424	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1425	Mexico [member]	Member			country:MX
1426	Colombia [member]	Member			country:CO
1427	Costa Rica [member]	Member			country:CR
1428	Guatemala [member]	Member			country:GT
1429	Nicaragua [member]	Member			country:NI
1430	Panama [member]	Member			country:PA
1431	Argentina [member]	Member			country:AR
1432	Brazil [member]	Member			country:BR
1433	South America [member]	Member			srt:SouthAmericaMember
1434	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1435	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1436	Cash Generating Units [member]	Member			ifrs-full:AggregateNotSignificantIndividualAssetsOrCashgeneratingUnitsMember
1437	FEMSA Comercio - Health Division [member]	Member			fmx:HealthDivisionMember
1438	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1439	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1440	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
1441	Creation date [axis]	Axis			ifrs-full:CreationDateAxis
1442	Default financial statements date [member]	Member			ifrs-full:DefaultFinancialStatementsDateMember
1443	2017 - 2026 [member]	Member			fmx:TwoThousandSeventeenToTwoThousandTwentySixMember
1444	2018 - 2027 [member]	Member			fmx:TwoThousandEighteenToTwoThousandTwentySevenMember
1445	Disclosure of information for cash-generating units [line items]	LineItems			ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
1446	Pre-tax WACC	Concept (Percent)	As Of		fmx:WeightedAverageCostOfCapitalPreTaxPercentage
1447	Post-tax WACC	Concept (Percent)	As Of		fmx:WeightedAverageCostOfCapitalAfterTaxPercentage
1448	Expected Annual Long- Term	Concept (Percent)	As Of		fmx:ExpectedAnnualLongtermInflationPercentage
1449	Expected Volume Growth Rates	Concept (Percent)	As Of		fmx:ExpectedVolumeGrowthRatesPercentage
1450	1109 - Disclosure - Intangible Assets - Detailed Information About Sensitivity to Changes in Assumptions (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIntangibleAssetsDetailedInformationAboutSensitivityToChangesInAssumptions
1451	Disclosure of sensitivity analysis for actuarial assumptions [table]	Table	*	*	ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
1452	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1453	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1454	Cash Generating Units [member]	Member			ifrs-full:AggregateNotSignificantIndividualAssetsOrCashgeneratingUnitsMember
1455	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1456	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1457	Mexico [member]	Member			country:MX
1458	Colombia [member]	Member			country:CO
1459	Costa Rica [member]	Member			country:CR
1460	Guatemala [member]	Member			country:GT
1461	Nicaragua [member]	Member			country:NI
1462	Panama [member]	Member			country:PA
1463	Argentina [member]	Member			country:AR
1464	Brazil [member]	Member			country:BR
1465	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1466	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1467	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
1468	Disclosure of sensitivity analysis for actuarial assumptions [line items]	LineItems			ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
1469	Change in WACC	Concept (Percent)	As Of		fmx:ChangeInWeightedAverageCostOfCapitalPercentage
1470	Change in Sales Growth CAGR	Concept (Percent)	As Of		fmx:ChangeInVolumeGrowthOfCompoundAnnualGrowthRate
1471	Effect on Valuation	Concept (Text/String)	For Period		fmx:EffectOnValuation
1472	1110 - Disclosure - Other Assets and Other Financial Assets - Disclosure of Other Non-Current Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherAssetsAndOtherFinancialAssetsDisclosureOfOtherNonCurrentAssets
1473	Implied Table	Table	*	*	implied:Table
1474	Miscellaneous assets [abstract]	Abstract			ifrs-full:MiscellaneousAssetsAbstract
1475	Agreement with customers	Concept (Monetary)	As Of	Debit	fmx:AgreementWithCustomersOtherNonCurrentAssets
1476	Long term prepaid advertising expenses	Concept (Monetary)	As Of	Debit	fmx:LongTermPrepaidAdvertisingExpenses
1477	Guarantee deposits	Concept (Monetary)	As Of	Debit	fmx:GuaranteeDepositsOtherNoncurrentAssets
1478	Prepaid bonuses	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentPrepayments
1479	Advances to acquire property, plant and equipment	Concept (Monetary)	As Of	Debit	fmx:AdvancesToAcquirePropertyPlantAndEquipment
1480	Recoverable taxes	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsNoncurrent
1481	Indemnifiable assets from business combinations	Concept (Monetary)	As Of	Debit	fmx:IndemnifiableAssetsFromBusinessCombination
1482	Recoverable taxes from business combinations	Concept (Monetary)	As Of	Debit	fmx:RecoverableTaxesFromAcquisition
1483	Others	Concept (Monetary)	As Of	Debit	fmx:OtherMiscelleneousAssets
1484	Total other assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentNonfinancialAssets
1485	1111 - Disclosure - Other Assets and Other Financial Assets - Disclosure of Other Non-Current Financial Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherAssetsAndOtherFinancialAssetsDisclosureOfOtherNonCurrentFinancialAssets
1486	Implied Table	Table	*	*	implied:Table
1487	Categories of financial assets [abstract]	Abstract			ifrs-full:CategoriesOfFinancialAssetsAbstract
1488	Non-current accounts receivable	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivables
1489	Derivative financial instruments (see Note 20)	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentDerivativeFinancialAssets
1490	Investments	Concept (Monetary)	As Of	Debit	ifrs-full:CorporateDebtInstrumentsHeld
1491	Investments in other entities	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociates
1492	Others	Concept (Monetary)	As Of	Debit	fmx:OtherNonCurrentFinancialAssetsClassifiedAsOthers
1493	Total other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
1494	1112 - Disclosure - Other Assets and Other Financial Assets - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherAssetsAndOtherFinancialAssetsAdditionalInformation
1495	Disclosure Of Other Assets And Other Financial Assets [table]	Table	*	*	fmx:DisclosureOfOtherAssetsAndOtherFinancialAssetsTable
1496	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1497	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1498	Fair value [member]	Member			ifrs-full:AtFairValueMember
1499	Disclosure Of Other Assets And Other Financial Assets [line items]	LineItems			fmx:DisclosureOfOtherAssetsAndOtherFinancialAssetsLineItems
1500	Non-current accounts receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentReceivables
1501	1113 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Summary of Balances and Transactions with Related Parties and Affiliated Companies (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesSummaryOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompanies
1502	Disclosure Of Balances And Transactions With Related Parties And Affiliates [table]	Table	*	*	fmx:DisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesTable
1503	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1504	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1505	The Coca-Cola company [member]	Member			fmx:CocaColaCompanyMember
1506	BBVA Bancomer, S.A. de C.V. [member]	Member			fmx:BBVABancomerSADeCVMember
1507	JP Morgan Chase & Co. [member]	Member			fmx:JPMorganChaseCoMember
1508	Banco Mercantil del Norte S.A. [member]	Member			fmx:BancoMercantilDelNorteSAMember
1509	Grupo Industrial Saltillo S.A.B. de C.V [member]	Member			fmx:GrupoIndustrialSaltilloSABDeCVMember
1510	Heineken [member]	Member			fmx:HeinekenGroupMember
1511	Former Shareholders Vonpar [member]	Member			fmx:FormerShareholdersVonparMember
1512	Caffenio [member]	Member			fmx:CaffenioMember
1513	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1514	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1515	Accounts receivable [member]	Member			fmx:AccountsReceivable1Member
1516	Cash and cash equivalent [member]	Member			fmx:CashAndCashEquivalentMember
1517	Other financial asset [member]	Member			fmx:OtherFinancialAssetMember
1518	Accounts receivable and other financial assets [Member]	Member			fmx:AccountsReceivableAndOtherFinancialAssetsMember
1519	Accounts receivable and other current financial assets [Member]	Member			fmx:AccountsReceivableAndOtherCurrentFinancialAssetsMember
1520	Classes of liabilities [axis]	Axis			ifrs-full:ClassesOfLiabilitiesAxis
1521	Liabilities [member]	Member			ifrs-full:LiabilitiesMember
1522	Bank loans and notes payables and accounts payable [Member]	Member			fmx:BankLoansNotesPayablesAndAccountsPayableMember
1523	Bank loans and notes payables [member]	Member			fmx:BankLoansAndNotesPayablesMember
1524	Accounts payable [member]	Member			fmx:AccountsPayable1Member
1525	Disclosure of balances and transactions with related parties and affiliates [Line Items]	LineItems			fmx:DisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesLineItems
1526	Balances	Abstract			ifrs-full:OutstandingBalancesForRelatedPartyTransactionsAbstract
1527	Account receivable with related party transaction	Concept (Monetary)	As Of	Debit	ifrs-full:AmountsReceivableRelatedPartyTransactions
1528	Assets balance with related party transaction	Concept (Monetary)	As Of	Debit	fmx:AssetsBalanceWithRelatedPartyTransaction
1529	Other receivables	Concept (Monetary)	As Of	Debit	fmx:OtherReceivableRelatedPartyTransaction
1530	Account payables with related party transactions	Concept (Monetary)	As Of	Credit	ifrs-full:AmountsPayableRelatedPartyTransactions
1531	Other payables	Concept (Monetary)	As Of	Credit	fmx:OtherPayablesToRelatedPartyTransaction
1532	1114 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Summary of Balances and Transactions with Related Parties and Affiliated Companies (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesSummaryOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesParenthetical
1533	Disclosure Of Balances And Transactions With Related Parties And Affiliates [table]	Table	*	*	fmx:DisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesTable
1534	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1535	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1536	Cafe Del Pacifico SAPI De CV Caffenio [member]	Member			fmx:CafeDelPacificoSAPIDeCVCaffenioMember
1537	Disclosure of balances and transactions with related parties and affiliates [Line Items]	LineItems			fmx:DisclosureOfBalancesAndTransactionsWithRelatedPartiesAndAffiliatesLineItems
1538	Non-controlling interest rate	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1539	1115 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesAdditionalInformation
1540	Implied Table	Table	*	*	implied:Table
1541	Disclosure of transactions between related parties [abstract]	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
1542	Expense resulting from the uncollectibility of balances due from related parties	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseRecognisedDuringPeriodForBadAndDoubtfulDebtsForRelatedPartyTransaction
1543	1116 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Summary of Transaction with Related Parties (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesSummaryOfTransactionWithRelatedParties
1544	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1545	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1546	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1547	The Coca-Cola company [member]	Member			fmx:CocaColaCompanyMember
1548	Heineken [member]	Member			fmx:HeinekenGroupMember
1549	Grupo Industrial Saltillo, S.A. de C.V. [member]	Member			fmx:GrupoIndustrialSaltilloSADeCVMember
1550	Jugos del Valle, S.A.P.I. de C.V. [member]	Member			fmx:JugosDelValleSAPIDeCVMember
1551	Caffenio [member]	Member			fmx:CaffenioMember
1552	Grupo Industrial Bimbo, S.A.B. de C. V. [member]	Member			fmx:GrupoIndustrialBimboSABDeCVMember
1553	Promotora Industrial Azucarera, S.A. de C.V. [member]	Member			fmx:PromotoraIndustrialAzucareraSAdeCVMember
1554	BBVA Bancomer, S.A. de C.V. [member]	Member			fmx:BBVABancomerSADeCVMember
1555	Beta San Miguel [member]	Member			fmx:BetaSanMiguelMember
1556	Promotora Mexicana de Embotelladores, S.A. de C.V. [member]	Member			fmx:PromotoraMexicanaDeEmbotelladoresSADeCVMember
1557	Industria Envasadora De Queretaro SA De CVIEQSA [member]	Member			fmx:IndustriaEnvasadoraDeQueretaroSADeCVIEQSAMember
1558	Leao Alimentos e Bebidas, LTDA [member]	Member			fmx:LeaoAlimentosEBebidasLTDAMember
1559	Grupo Televisa, S.A.B. de C.V. [member]	Member			fmx:GrupoTelevisaSABDeCVMember
1560	Grupo Nacional Provincial, S.A.B. [Member]	Member			fmx:GrupoNacionalProvincialSABMember
1561	Fundacion FEMSA, A.C. [member]	Member			fmx:FundacionFemsaAcMember
1562	Difusion y Fomento Cultural, A.C. [member]	Member			fmx:DifusionYFomentoCulturalACMember
1563	Donations to ITESM [member]	Member			fmx:DonationsToItesmMember
1564	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
1565	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
1566	Logistic services [member]	Member			fmx:LogisticServicesMember
1567	Other revenue [member]	Member			fmx:OtherRevenueMember
1568	Concentrate [member]	Member			fmx:ConcentrateMember
1569	Beer [member]	Member			fmx:BeerMember
1570	Coffee [member]	Member			fmx:CoffeeMember
1571	Baked goods and snacks [member]	Member			fmx:BakedGoodsAndSnacksMember
1572	Advertising [member]	Member			fmx:AdvertisingMember
1573	Juices [member]	Member			fmx:JuicesMember
1574	Sugar [member]	Member			fmx:SugarMember
1575	Sugar, cans and aluminum lids [member]	Member			fmx:SugarCansAndAluminumLidsMember
1576	Canned products [member]	Member			fmx:CannedProductsMember
1577	Inventories [member]	Member			fmx:Inventories1Member
1578	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1579	Income:	Abstract			fmx:IncomeFromRelatedPartyAbstract
1580	Income from related party transaction	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
1581	Expenses:	Abstract			fmx:ExpensesFromRelatedPartyAbstract
1582	Purchase of goods from related party transaction	Concept (Monetary)	For Period	Debit	ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
1583	Services received to related party transaction	Concept (Monetary)	For Period	Debit	ifrs-full:ServicesReceivedRelatedPartyTransactions
1584	Interest expense and fee paid to related party transaction	Concept (Monetary)	For Period	Credit	fmx:InterestExpenseAndFeePaidRelatedPartyTransactions
1585	Insurance premiums for policies with Grupo Nacional Provincial, S.A.B. (3)	Concept (Monetary)	For Period		ifrs-full:SettlementOfLiabilitiesByEntityOnBehalfOfRelatedPartyRelatedPartyTransactions
1586	Donations to related party transactions	Concept (Monetary)	For Period	Debit	fmx:DonationsToRelatedPartyTransactions
1587	Other expenses with related parties	Concept (Monetary)	For Period	Debit	fmx:OtherExpensesWithRelatedParty
1588	1117 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Summary of Transaction with Related Parties (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesSummaryOfTransactionWithRelatedPartiesParenthetical
1589	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1590	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1591	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1592	The Coca-Cola company [member]	Member			fmx:CocaColaCompanyMember
1593	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1594	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1595	Cafe Del Pacifico SAPI De CV Caffenio [member]	Member			fmx:CafeDelPacificoSAPIDeCVCaffenioMember
1596	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1597	Contributions	Concept (Monetary)	As Of	Debit	fmx:ContributionsDueFromRelatedParties
1598	Non-controlling interest rate	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1599	1118 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Commitments with Related Parties (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesCommitmentsWithRelatedParties
1600	Implied Table	Table	*	*	implied:Table
1601	Disclosure of transactions between related parties [abstract]	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
1602	Commitment	Concept (Text/String)	For Period		ifrs-full:DescriptionOfNatureOfRelatedPartyRelationship
1603	Conditions	Concept (Text/String)	For Period		ifrs-full:ExplanationOfTermsAndConditionsOfOutstandingBalancesForRelatedPartyTransaction
1604	1119 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Commitments with Related Parties (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesCommitmentsWithRelatedPartiesParenthetical
1605	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1606	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1607	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1608	Heineken [member]	Member			fmx:HeinekenGroupMember
1609	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1610	Renewal option for supply contract	Concept (xbrli:durationItemType)	For Period		fmx:TermOfRenewalOptionForRelatedPartyTransaction
1611	Restriction period from holding exclusive contract with another supplier at the end of the contract term	Concept (xbrli:durationItemType)	For Period		fmx:RestrictionPeriodForRelatedPartyTransaction
1612	1120 - Disclosure - Balances and Transactions with Related Parties and Affiliated Companies - Benefits and Aggregate Compensation Paid to Executive Officers and Senior Management (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsWithRelatedPartiesAndAffiliatedCompaniesBenefitsAndAggregateCompensationPaidToExecutiveOfficersAndSeniorManagement
1613	Implied Table	Table	*	*	implied:Table
1614	Disclosure of transactions between related parties [abstract]	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
1615	Short-term employee benefits paid	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1616	Postemployment benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
1617	Termination benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationTerminationBenefits
1618	Share based payments	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1619	1121 - Disclosure - Balances and Transactions in Foreign Currencies - Summary of Assets, Liabilities Foreign Currencies (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsInForeignCurrenciesSummaryOfAssetsLiabilitiesForeignCurrencies
1620	Disclosure of Balances and Transactions in Foreign Currencies [table]	Table	*	*	fmx:DisclosureOfBalancesAndTransactionsInForeignCurrenciesTable
1621	Currency [Axis]	Axis			srt:CurrencyAxis
1622	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1623	U.S. dollars [member]	Member			fmx:USDollarMember
1624	Euro [member]	Member			fmx:EuroMember
1625	Other currencies [member]	Member			fmx:OtherCurrenciesMember
1626	Disclosure of Balances and Transactions in Foreign Currencies [line items]	LineItems			fmx:DisclosureOfBalancesAndTransactionsInForeignCurrenciesLineItems
1627	Short-Term Assets	Concept (Monetary)	As Of	Debit	fmx:ShortTermForeignCurrencyFinancialAssets
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1630	Long-Term Liabilities	Concept (Monetary)	As Of	Credit	fmx:LongTermForeignCurrencyFinancialLiabilities
1631	1122 - Disclosure - Balances and Transactions in Foreign Currencies - Summary of Transactions in Foreign Currencies (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsInForeignCurrenciesSummaryOfTransactionsInForeignCurrencies
1632	Disclosure of Balances and Transactions in Foreign Currencies [table]	Table	*	*	fmx:DisclosureOfBalancesAndTransactionsInForeignCurrenciesTable
1633	Currency [Axis]	Axis			srt:CurrencyAxis
1634	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1635	U.S. dollars [member]	Member			fmx:USDollarMember
1636	Euro [member]	Member			fmx:EuroMember
1637	Other currencies [member]	Member			fmx:OtherCurrenciesMember
1638	Disclosure of Balances and Transactions in Foreign Currencies [line items]	LineItems			fmx:DisclosureOfBalancesAndTransactionsInForeignCurrenciesLineItems
1639	Revenues	Concept (Monetary)	For Period	Credit	fmx:RevenueThroughForeignCurrency
1640	Other Operating Revenues	Concept (Monetary)	For Period	Credit	fmx:OtherRevenueOnExchangeDifferencesOnTranslation
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1642	Interest Expense	Concept (Monetary)	For Period	Debit	fmx:InterestExpenseThroughForeignCurrency
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1644	Asset Acquisitions	Concept (Monetary)	For Period	Debit	fmx:AssetsAcquisitionsThroughForeignCurrency
1645	Other	Concept (Monetary)	For Period	Debit	fmx:OtherForeignCurrencyTransactions
1646	1123 - Disclosure - Balances and Transactions in Foreign Currencies - Summary of Exchange Rates (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBalancesAndTransactionsInForeignCurrenciesSummaryOfExchangeRates
1647	Disclosure Of Exchange Rates [table]	Table	*	*	fmx:DisclosureOfExchangeRatesTable
1648	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1649	Non-adjusting Events After Reporting Period [Member]	Member			ifrs-full:NonadjustingEventsMember
1650	Changes in foreign exchange rates [member]	Member			ifrs-full:AbnormallyLargeChangesInAssetPricesOrForeignExchangeRatesMember
1651	Currency [Axis]	Axis			srt:CurrencyAxis
1652	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1653	U.S. dollars [member]	Member			fmx:USDollarMember
1654	Euro [member]	Member			fmx:EuroMember
1655	Disclosure of exchange rates [Line Items]	LineItems			fmx:DisclosureOfExchangeRatesLineItems
1656	Closing foreign exchange rate	Concept (Decimal)	As Of		ifrs-full:ClosingForeignExchangeRate
1657	1124 - Disclosure - Employee Benefits - Summary of Actuarial Assumptions (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfActuarialAssumptions
1658	Implied Table	Table	*	*	implied:Table
1659	Disclosure of defined benefit plans [abstract]	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
1660	Financial:	Abstract			ifrs-full:SurplusDeficitInPlanAbstract
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1662	Salary increase	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
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1664	Healthcare cost increase rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
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1670	1125 - Disclosure - Employee Benefits - Summary of Defined Benefit Plan Expected Future Benefit Payments (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfDefinedBenefitPlanExpectedFutureBenefitPayments
1671	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1672	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
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1674	Pension and retirement plans [member]	Member			fmx:PensionAndRetirementPlansMember
1675	Seniority premiums [member]	Member			fmx:SeniorityPremiumsMember
1676	Post retirement medical services [member]	Member			fmx:PostRetirementMedicalServicesMember
1677	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
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1680	2021	Concept (Monetary)	As Of	Credit	fmx:DefinedBenefitPlanExpectedFutureBenefitPaymentYearThree
1681	2022	Concept (Monetary)	As Of	Credit	fmx:DefinedBenefitPlanExpectedFutureBenefitPaymentYearFour
1682	2023	Concept (Monetary)	As Of	Credit	fmx:DefinedBenefitPlanExpectedFutureBenefitPaymentYearFive
1683	2024 to 2028	Concept (Monetary)	As Of	Credit	fmx:DefinedBenefitPlanExpectedFutureBenefitPaymentYearSixToTen
1684	1126 - Disclosure - Employee Benefits - Summary of Balances of the Liabilities for Employee Benefits (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfBalancesOfTheLiabilitiesForEmployeeBenefits
1685	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1686	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1687	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1688	Pension and retirement plans [member]	Member			fmx:PensionAndRetirementPlansMember
1689	Seniority premiums [member]	Member			fmx:SeniorityPremiumsMember
1690	Post retirement medical services [member]	Member			fmx:PostRetirementMedicalServicesMember
1691	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1692	Defined benefit obligation	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
1693	Defined benefit obligation funds at fair value	Concept (Monetary)	As Of	Debit	fmx:DefinedBenefitObligationFundsAtFairValue
1694	Net defined benefit liability	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1695	Total Employee Benefits	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisionsForEmployeeBenefits
1696	1127 - Disclosure - Employee Benefits - Summary of Trust Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfTrustAssets
1697	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1698	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
1699	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
1700	Level 1 [member]	Member			ifrs-full:Level1OfFairValueHierarchyMember
1701	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
1702	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
1703	Traded Securities [member]	Member			fmx:TradedSecuritiesMember
1704	Bank instruments [member]	Member			fmx:BankInstrumentsMember
1705	Federal government instruments of the respective countries [member]	Member			fmx:FederalGovernmentInstrumentsMember
1706	Publicly traded shares [member]	Member			fmx:PubliclyTradedSharesMember
1707	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
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1710	Variable return:	Abstract			fmx:VariableReturnAbstract
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1712	Trust assets fixed and variable return percentage	Concept (Percent)	As Of		fmx:TrustAssetsFixedAndVariableReturnPercentage
1713	1128 - Disclosure - Employee Benefits - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsAdditionalInformation
1714	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1715	Range [axis]	Axis			ifrs-full:RangeAxis
1716	Ranges [member]	Member			ifrs-full:RangesMember
1717	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1718	Continuing involvement in derecognised financial assets by type of instrument [axis]	Axis			ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis
1719	Types of instrument [member]	Member			ifrs-full:TypesOfInstrumentMember
1720	Mexican Federal Government instruments [member]	Member			fmx:MexicanFederalGovernmentInstrumentsMember
1721	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1722	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1723	Discount rates [member]	Member			ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1724	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1725	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1726	Mexican subsidiaries [member]	Member			ifrs-full:SubsidiariesMember
1727	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1728	Plan asset investment for related parties, percentage	Concept (Percent)	For Period		fmx:PercentageOfPlanAssetInvestmentForRelatedParties
1729	Fund assets, percentage	Concept (Percent)	For Period		fmx:PercentageOfFundAssets
1730	Impact on absolute terms of variation in the assumptions on net defined benefit liability	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
1731	1129 - Disclosure - Employee Benefits - Summary of Amounts and Types of Securities in Related Parties Included in Portfolio Fund (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfAmountsAndTypesOfSecuritiesInRelatedPartiesIncludedInPortfolioFund
1732	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1733	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1734	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1735	Debt [member]	Member			ifrs-full:DebtSecuritiesMember
1736	Capital [member]	Member			fmx:CapitalSecuritiesMember
1737	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1738	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1739	Grupo Televisa, S.A.B. de C.V. [member]	Member			fmx:GrupoTelevisaSABDeCVMember
1740	El Puerto de Liverpool, S.A.B. de C.V. [member]	Member			fmx:E1PuertoDeLiverpoolSABDeCVMember
1741	Grupo Financiero Banorte, S.A.B. de C.V. [member]	Member			fmx:GrupoFinancieroBanorteSABDeCVMember
1742	Grupo BBVA Bancomer, S.A. de C.V. [member]	Member			fmx:GrupoBbvaBancomerSaDeCvMember
1743	Gentera, S.A.B. de C.V. [member]	Member			fmx:GenteraSABDeCVMember
1744	Grupo Industrial Bimbo, S.A.B. de C. V. [member]	Member			fmx:GrupoIndustrialBimboSABDeCVMember
1745	Grupo Aeroportuario del Suereste, S.A.B. de C.V. [member]	Member			fmx:GrupoAeroportuarioDelSueresteDeMember
1746	CEMEX, S.A.B. de C.V. [member]	Member			fmx:CemexDeMember
1747	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1748	Investments in securities	Concept (Monetary)	As Of	Debit	fmx:InvestmentsInSecurities
1749	1130 - Disclosure - Employee Benefits - Summary of Amount Recognized in Consolidated Income Statements and Consolidated Statements of Comprehensive Income (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfAmountRecognizedInConsolidatedIncomeStatementsAndConsolidatedStatementsOfComprehensiveIncome
1750	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1751	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
1752	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
1753	Net benefit cost recognized in the consolidated statements of income [member]	Member			fmx:NetBenefitCostRecognizedInTheConsolidatedStatementsOfIncomeMember
1754	Net benefit cost recognized in consolidated statements of accumulated other comprehensive income [member]	Member			fmx:NetBenefitCostRecognizedInConsolidatedStatementsOfAccumulatedOtherComprehensiveIncomeMember
1755	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
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1757	Pension and retirement plans [member]	Member			fmx:PensionAndRetirementPlansMember
1758	Seniority premiums [member]	Member			fmx:SeniorityPremiumsMember
1759	Post retirement medical services [member]	Member			fmx:PostRetirementMedicalServicesMember
1760	Disclosure of net defined benefit liability (asset) [line items]	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1761	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
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1763	Gain or Loss on Settlement or Curtailment	Concept (Monetary)	For Period	Credit	fmx:GainsLossesArisingFromSettlementsOrCurtailmentsNetDefinedBenefitLiabilityAsset
1764	Net Interest on the Net Defined Benefit Liability	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
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1766	1131 - Disclosure - Employee Benefits - Summary of Remeasurements of Employee Benefit Plans (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfRemeasurementsOfEmployeeBenefitPlans
1767	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1768	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
1769	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
1770	Net benefit cost recognized in consolidated statements of accumulated other comprehensive income [member]	Member			fmx:NetBenefitCostRecognizedInConsolidatedStatementsOfAccumulatedOtherComprehensiveIncomeMember
1771	Disclosure of net defined benefit liability (asset) [line items]	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
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1775	Actuarial gains and (losses) arising from changes in financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
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1778	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
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1784	Post-employment [member]	Member			fmx:PostEmploymentPlanMember
1785	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1786	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1787	Present value of defined benefit obligation [member]	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1788	Disclosure of net defined benefit liability (asset) [line items]	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
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1800	Acquisitions	Concept (Monetary)	For Period	Debit	fmx:AcquisitionsNetDefinedBenefitLiabilityAsset
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1802	1133 - Disclosure - Employee Benefits - Summary of Changes in the Balance of Plan Assets (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfChangesInTheBalanceOfPlanAssets
1803	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1804	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
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1815	1134 - Disclosure - Employee Benefits - Summary of Net Defined Benefit Liability Asset (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfNetDefinedBenefitLiabilityAsset
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1822	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1823	Discount rate +1% [member]	Member			fmx:DiscountRatePlusOnePercentMember
1824	Discount rate -1% [member]	Member			fmx:DiscountRateMinusOnePercentMember
1825	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1826	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1827	Discount rates [member]	Member			ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1828	Future salary growth [Member]	Member			ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember
1829	Medical cost trend rates [Member]	Member			ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember
1830	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1831	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1832	Pension and retirement plans [member]	Member			fmx:PensionAndRetirementPlansMember
1833	Seniority premiums [member]	Member			fmx:SeniorityPremiumsMember
1834	Postretirement medical services [member]	Member			ifrs-full:PostemploymentMedicalDefinedBenefitPlansMember
1835	Post retirement medical services [member]	Member			fmx:PostRetirementMedicalServicesMember
1836	Disclosure of net defined benefit liability (asset) [line items]	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1837	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1838	Gain or Loss on Settlement or Curtailment	Concept (Monetary)	For Period	Credit	fmx:GainsLossesArisingFromSettlementsOrCurtailmentsNetDefinedBenefitLiabilityAsset
1839	Effect of Net Interest on the Net Defined Benefit Liability (Asset)	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1840	Remeasurements of the Net Defined Benefit Liabilility (Assets)	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1841	1135 - Disclosure - Employee Benefits - Summary of Employee Benefit Expenses (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEmployeeBenefitsSummaryOfEmployeeBenefitExpenses
1842	Implied Table	Table	*	*	implied:Table
1843	Classes of employee benefits expense [abstract]	Abstract			ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
1844	Wages and salaries	Concept (Monetary)	For Period	Debit	ifrs-full:WagesAndSalaries
1845	Social security costs	Concept (Monetary)	For Period	Debit	ifrs-full:SocialSecurityContributions
1846	Employee profit sharing	Concept (Monetary)	For Period	Debit	fmx:EmployeeProfitSharing
1847	Post-employment benefits	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1848	Share-based payments	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1849	Termination benefits	Concept (Monetary)	For Period	Debit	ifrs-full:TerminationBenefitsExpense
1850	Employee benefits expense	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
1851	1136 - Disclosure - Bonus Programs - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBonusProgramsAdditionalInformation
1852	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1853	Range [axis]	Axis			ifrs-full:RangeAxis
1854	Ranges [member]	Member			ifrs-full:RangesMember
1855	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1856	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1857	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1858	Percentage of bonus	Concept (Percent)	For Period		fmx:PercentageOfBonus
1859	Percentage of economic value added	Concept (Percent)	For Period		fmx:PercentageOfBonusBasedOnEconomicValueAdded
1860	Percentage of annual bonus	Concept (Percent)	For Period		fmx:PercentageOfAnnualBonus
1861	Compensation expense	Concept (Monetary)	For Period	Debit	ifrs-full:OtherEmployeeExpense
1862	Fair value of shares held by trust	Concept (Shares)	As Of		ifrs-full:SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates
1863	1137 - Disclosure - Bonus Programs - Summary of Number of Shares Held by the Trust (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBonusProgramsSummaryOfNumberOfSharesHeldByTheTrust
1864	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1865	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
1866	Entity [Domain]	Member			dei:EntityDomain
1867	FEMSA UBD [member]	Member			fmx:FEMSAMember
1868	KOFL [member]	Member			fmx:KOFLMember
1869	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1870	Beginning balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1871	Shares acquired by the administrative trust to employees	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1872	Shares released from administrative trust to employees upon vesting	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1873	Forfeitures	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
1874	Ending balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1875	1138 - Disclosure - Bank Loans and Notes Payable - Summary of Detailed Information About Borrowings (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBankLoansAndNotesPayableSummaryOfDetailedInformationAboutBorrowings
1876	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1877	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1878	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1879	Fair value [member]	Member			ifrs-full:AtFairValueMember
1880	Currency [Axis]	Axis			srt:CurrencyAxis
1881	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1882	U S dollar [member]	Member			currency:USD
1883	Mexican peso [member]	Member			currency:MXN
1884	Brazilian reais [member]	Member			currency:BRL
1885	Colombian peso [member]	Member			currency:COP
1886	Chilean peso [member]	Member			currency:CLP
1887	Argentine peso [member]	Member			currency:ARS
1888	Uruguayan peso [member]	Member			currency:UYU
1889	Euro [member]	Member			currency:EUR
1890	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1891	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1892	Less than 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
1893	1-2 years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1894	2-3 years [member]	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1895	3-4 years [member]	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1896	4-5 years [member]	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1897	Later than 5 years [member]	Member			ifrs-full:LaterThanFiveYearsMember
1898	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1899	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1900	Variable rate debt [member]	Member			ifrs-full:FloatingInterestRateMember
1901	Fixed rate debt [member]	Member			ifrs-full:FixedInterestRateMember
1902	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1903	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1904	Bank loans [member]	Member			fmx:LongTermBorrowingsBankLoansMember
1905	Domestic senior notes [member]	Member			fmx:LongTermBorrowingsDomesticSeniorNotesMember
1906	Notes payable [member]	Member			fmx:LongTermBorrowingsNotesPayableMember
1907	Bank loans [member]	Member			fmx:BankLoansMember
1908	Capital leases [member]	Member			fmx:CapitalLeasesMember
1909	Senior unsecured notes [member]	Member			fmx:LongTermBorrowingsSeniorUnsecuredNotesMember
1910	Long term borrowings Yankee bond [member]	Member			fmx:LongTermBorrowingsYankeeBondMember
1911	Long term borrowings promissory note [member]	Member			fmx:LongTermBorrowingsPromissoryNoteMember
1912	Long term borrowings Bank of NY (FEMSA USD 2023) [member]	Member			fmx:LongTermBorrowingsBankOfNNYFEMSAUSD2023Member
1913	Long term borrowings Bank of NY (FEMSA USD 2043) [member]	Member			fmx:LongTermBorrowingsBankOfNYFEMSAUSD2043Member
1914	Long term borrowings capital lease [member]	Member			fmx:LongTermBorrowingsCapitalLeaseMember
1915	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1916	Short-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
1917	Long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1918	Current portion of long term debt	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
1919	Interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1920	Non-current portion of long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1921	1139 - Disclosure - Bank Loans and Notes Payable - Summary of Financial Instruments by Type of Interest Rate (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBankLoansAndNotesPayableSummaryOfFinancialInstrumentsByTypeOfInterestRate
1922	Disclosure of financial instruments by type of interest rate [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable
1923	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1924	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1925	Less than 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
1926	1-2 years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1927	2-3 years [member]	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1928	3-4 years [member]	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1929	4-5 years [member]	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1930	Later than 5 years [member]	Member			ifrs-full:LaterThanFiveYearsMember
1931	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1932	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1933	Cross-currency swaps [member]	Member			ifrs-full:CurrencySwapContractMember
1934	Interest rate swap [member]	Member			ifrs-full:InterestRateSwapContractMember
1935	Currency [Axis]	Axis			srt:CurrencyAxis
1936	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1937	U.S. dollars to Mexican pesos [member]	Member			fmx:USDollarToMexicanPersosMember
1938	U.S. dollars to Brazilian reais [member]	Member			fmx:USDollarToBrazilianReaisMember
1939	Chilean peso [member]	Member			currency:CLP
1940	Mexican peso [member]	Member			currency:MXN
1941	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1942	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1943	7.4% fixed to 7.2% variable interest rate [member]	Member			fmx:SevenPointFourPercentageFixedToSevenPointTwoPercentageVariableInterestRateMember
1944	Fixed to variable interest rate [member]	Member			fmx:FixedToVariableInterestRateMember
1945	Fixed to fixed interest rate [member]	Member			fmx:FixedToFixedInterestRateMember
1946	Variable to variable interest rate [member]	Member			fmx:VariableToVariableInterestRateMember
1947	Variable to fixed interest rate [member]	Member			fmx:VariableToFixedInterestRateMember
1948	6.0% variable to 5.9% fixed interest rate [member]	Member			fmx:VariableToFixedInterestRateTwoMember
1949	7.4% variable to 7.2% fixed interest rate [member]	Member			fmx:VariableToFixedInterestRateThreeMember
1950	Disclosure of financial instruments by type of interest rate [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems
1951	Interest pay rate	Concept (Percent)	For Period		fmx:FinancialInstrumentsDesignatedAsHedgingDerivativeInterestPayableRate
1952	Interest receive rate	Concept (Percent)	For Period		fmx:FinancialInstrumentsDesignatedAsHedgingDerivativeInterestReceivableRate
1953	Notional amount	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1954	1140 - Disclosure - Bank Loans and Notes Payable - Summary of Financial Instruments by Type of Interest Rate (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBankLoansAndNotesPayableSummaryOfFinancialInstrumentsByTypeOfInterestRateParenthetical
1955	Disclosure of financial instruments by type of interest rate [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable
1956	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1957	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1958	Cross-currency swaps [member]	Member			ifrs-full:CurrencySwapContractMember
1959	Interest rate swap [member]	Member			ifrs-full:InterestRateSwapContractMember
1960	Currency [Axis]	Axis			srt:CurrencyAxis
1961	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1962	U.S. dollars to Mexican pesos [member]	Member			fmx:USDollarToMexicanPersosMember
1963	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1964	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1965	Fixed rate debt [member]	Member			ifrs-full:FixedInterestRateMember
1966	Variable rate debt [member]	Member			ifrs-full:FloatingInterestRateMember
1967	Disclosure of financial instruments by type of interest rate [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems
1968	Notional amount	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1969	Interest rate percentage	Concept (Text/String)	For Period		ifrs-full:BorrowingsInterestRateBasis
1970	Units of investment, percentage	Concept (Percent)	For Period		fmx:PercentageOfUnitOfInvestment
1971	1141 - Disclosure - Bank Loans and Notes Payable - Summary of Interest Expense (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBankLoansAndNotesPayableSummaryOfInterestExpense
1972	Implied Table	Table	*	*	implied:Table
1973	Disclosure of detailed information about borrowings [abstract]	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
1974	Interest on debts and borrowings	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnBorrowings
1975	Capitalized interest	Concept (Monetary)	For Period		ifrs-full:InterestCostsCapitalised
1976	Finance charges for employee benefits	Concept (Monetary)	For Period	Debit	fmx:FinanceChargesForEmployeeBenefits
1977	Derivative instruments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnHedgingInstrument
1978	Finance operating charges	Concept (Monetary)	For Period	Debit	fmx:FinanceOperatingCharges
1979	Total	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
1980	1142 - Disclosure - Bank Loans and Notes Payable - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBankLoansAndNotesPayableAdditionalInformation
1981	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1982	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1983	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1984	2.38% debt bonds maturing on 2018 [member]	Member			fmx:TwoPointThreeEightPercentageDebtBondsMaturingOnTwoThousandEighteenMember
1985	1.75% Senior Notes [member]	Member			fmx:OnePointSevenFivePercentageSeniorNotesMember
1986	8.27% Debt Bonds Maturing on 2021 [member]	Member			fmx:EightPointTwoSevenPercentageDebtBondsMaturingOnTwoThousandTwentyOneMember
1987	5.46% Debt Bonds Maturing on 2023 [member]	Member			fmx:FivePointFourSixPercentageDebtBondsMaturingOnTwoThousandTwentyThreeMember
1988	4.63% Senior Notes Maturing on February Fifteen Two Thousand Twenty [member]	Member			fmx:FourPointSixThreePercentageSeniorNotesMaturingOnFebruaryFifteenTwoThousandTwentyMember
1989	Two Point Three Eight Percentage Senior Notes Maturing On November Twenty Six Two Thousand Eighteen [member]	Member			fmx:TwoPointThreeEightPercentageSeniorNotesMaturingOnNovemberTwentySixTwoThousandEighteenMember
1990	Three Point Eight Eight Percentage Senior Notes Maturing On November Twenty Six Two Thousand Twenty Three [member]	Member			fmx:ThreePointEightEightPercentageSeniorNotesMaturingOnNovemberTwentySixTwoThousandTwentyThreeMember
1991	5.25% Senior Notes Maturing On November 26, 2045 [member]	Member			fmx:FivePointTwoFivePercentageSeniorNotesMaturingOnNovemberTwentySixTwoThousandFortyThreeMember
1992	TIIE plus 0.5% debt bonds maturing on 2022 [Member]	Member			fmx:TIIEPlusZeroPointFivePercentageDebtBondsMaturingOnTwoThousandTwentyTwoMember
1993	7.87% debt bonds maturing on 2027 [member]	Member			fmx:SevenPointEightSevenPercentageDebtBondsMaturingOnTwoThousandTwentySevenMember
1994	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1995	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1996	Ireland [member]	Member			country:IE
1997	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1998	Face amount	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1999	Maturity date	Concept (Text/String)	For Period		ifrs-full:BorrowingsMaturity
2000	Fixed interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
2001	Basis points over the relevant benchmark mid-swap	Concept (Text/String)	For Period		ifrs-full:BorrowingsInterestRateBasis
2002	Total yield percentage	Concept (Percent)	As Of		fmx:YieldRate
2003	Losses on exchange differences on translation of foreign operations, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
2004	Repayment of bonds	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBondsNotesAndDebentures
2005	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
2006	1143 - Disclosure - Bank Loans and Notes Payable - Summary of Liabilities Arising from Financing Activities (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureBankLoansAndNotesPayableSummaryOfLiabilitiesArisingFromFinancingActivities
2007	Disclosure of reconciliation of liabilities arising from financing activities [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
2008	Liabilities arising from financing activities [axis]	Axis			ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
2009	Liabilities arising from financing activities [member]	Member			ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
2010	Bank loans [member]	Member			fmx:BankLoansMember
2011	Notes payable [member]	Member			fmx:NotesPayableMember
2012	Lease liabilities [member]	Member			ifrs-full:LeaseLiabilitiesMember
2013	Disclosure of reconciliation of liabilities arising from financing activities [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
2014	Beginning balance	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
2015	Cash Flows	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
2016	Non-cash flows, Acquisition	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughObtainingOrLosingControlOfSubsidiariesOrOtherBusinessesLiabilitiesArisingFromFinancingActivities
2017	Non-cash flows, Foreign Exchange movement	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
2018	Non-cash flows, Others	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities
2019	Ending balance	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
2020	1144 - Disclosure - Other Income and Expenses - Summary of Other Income and Expenses (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherIncomeAndExpensesSummaryOfOtherIncomeAndExpenses
2021	Disclosure Of Other Operating Income Expense [table]	Table	*	*	fmx:DisclosureOfOtherOperatingIncomeExpenseTable
2022	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
2023	Ordinary shares [member]	Member			ifrs-full:OrdinarySharesMember
2024	Heineken group shares [member]	Member			fmx:HeinekenSharesMember
2025	Disclosure of Other Operating Income Expense [Line Items]	LineItems			fmx:DisclosureOfOtherOperatingIncomeExpenseLineItems
2026	Gain on sale of shares	Concept (Monetary)	For Period	Credit	fmx:GainOnSaleOfShares
2027	Gain on sale of other assets	Concept (Monetary)	For Period	Credit	fmx:GainsOnDisposalsOfOtherAssets
2028	Gain on sale of long-lived assets	Concept (Monetary)	For Period	Credit	ifrs-full:GainsOnDisposalsOfNoncurrentAssets
2029	Sale of waste material	Concept (Monetary)	For Period	Credit	fmx:SaleOfWasteMaterial
2030	Write off-contingencies(see Note 25.5)	Concept (Monetary)	For Period	Credit	fmx:WriteOffContingencies
2031	Recoveries from previous years	Concept (Monetary)	For Period	Credit	fmx:RecoveriesFromPreviousYears
2032	Insurance rebates	Concept (Monetary)	For Period	Credit	fmx:InsuranceRebates
2033	Foreign exchange gain	Concept (Monetary)	For Period	Credit	ifrs-full:NetForeignExchangeGain
2034	Others	Concept (Monetary)	For Period	Credit	ifrs-full:MiscellaneousOtherOperatingIncome
2035	Other income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
2036	Contingencies associated with prior acquisitions or disposals	Concept (Monetary)	For Period	Debit	fmx:ContingenciesAssociatedWithPriorAcquisitionsOrDisposals
2037	Loss on sale of equity financial assets	Concept (Monetary)	For Period	Debit	fmx:LossOnSaleOfEquityFinancialAssets
2038	Loss on sale of other assets	Concept (Monetary)	For Period	Debit	fmx:LossesOnDisposalsOfOtherAssets
2039	Recoveries of prior years	Concept (Monetary)	For Period	Debit	fmx:RecoveriesOfPreviousYears
2040	Impairment of long-lived assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
2041	Disposal of long-lived assets	Concept (Monetary)	For Period	Debit	fmx:DisposalOfLongLivedAssets
2042	Suppliers provisions	Concept (Monetary)	For Period	Debit	fmx:SuppliersProvisions
2043	Foreign exchange losses related to operating activities	Concept (Monetary)	For Period	Debit	ifrs-full:NetForeignExchangeLoss
2044	Non-income taxes from Colombia	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
2045	Contingencies	Concept (Monetary)	For Period	Debit	fmx:ProvisionsForContingencies
2046	Severance payments	Concept (Monetary)	For Period	Debit	fmx:SeverancePayments
2047	Donations	Concept (Monetary)	For Period	Debit	ifrs-full:DonationsAndSubsidiesExpense
2048	Legal fees and other expenses from past acquisitions	Concept (Monetary)	For Period	Debit	fmx:LegalFeesAndOtherExpensesFromPastAcquisitions
2049	Venezuela deconsolidation effect	Concept (Monetary)	For Period	Debit	fmx:DeconsolidationEffectOfOtherExpenses
2050	Other	Concept (Monetary)	For Period	Debit	ifrs-full:MiscellaneousOtherOperatingExpense
2051	Other expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByNature
2052	1145 - Disclosure - Other Income and Expenses - Summary of Other Income and Expenses (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherIncomeAndExpensesSummaryOfOtherIncomeAndExpensesParenthetical
2053	Disclosure Of Other Operating Income Expense [table]	Table	*	*	fmx:DisclosureOfOtherOperatingIncomeExpenseTable
2054	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2055	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2056	Venezuela [member]	Member			country:VE
2057	Disclosure of Other Operating Income Expense [Line Items]	LineItems			fmx:DisclosureOfOtherOperatingIncomeExpenseLineItems
2058	Impairment of long-lived assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
2059	1146 - Disclosure - Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValue
2060	Disclosure Of Financial Assets and Financial Liabilities [table]	Table	*	*	fmx:DisclosureOfFinancialAssetsAndFinancialLiabilitiesTable
2061	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
2062	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
2063	Level 1 [member]	Member			ifrs-full:Level1OfFairValueHierarchyMember
2064	Level 2 [member]	Member			ifrs-full:Level2OfFairValueHierarchyMember
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2181	1153 - Disclosure - Financial Instruments - Disclosure of Fair Value of Commodity Price Contracts (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsDisclosureOfFairValueOfCommodityPriceContracts
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2199	1154 - Disclosure - Financial Instruments - Disclosure of Net Effects of Expired Contracts Met Hedging Criteria (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsDisclosureOfNetEffectsOfExpiredContractsMetHedgingCriteria
2200	Disclosure of detailed information about hedges [table]	Table	*	*	ifrs-full:DisclosureOfHedgeAccountingTable
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2230	1156 - Disclosure - Financial Instruments - Disclosure of Sensitivity Analysis of Market Risks Management (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsDisclosureOfSensitivityAnalysisOfMarketRisksManagement
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2267	1157 - Disclosure - Financial Instruments - Summary of Sensitivity Analysis of Interest Rate Risks Management (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfSensitivityAnalysisOfInterestRateRisksManagement
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2285	1158 - Disclosure - Financial Instruments - Summary of Maturity Analysis for Non-derivative and Derivative Financial Liabilities (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfMaturityAnalysisForNonderivativeAndDerivativeFinancialLiabilities
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2307	1159 - Disclosure - Financial Instruments - Summary of Financial Instruments to Hedge Exposure to Foreign Exchange Rates and Interest Rates (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfFinancialInstrumentsToHedgeExposureToForeignExchangeRatesAndInterestRates
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2335	Commodity price risk [member]	Member			ifrs-full:CommodityPriceRiskMember
2336	Risk exposures [axis]	Axis			ifrs-full:RiskExposuresAxis
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2340	PX+MEG [member]	Member			fmx:PxMegMember
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2348	1160 - Disclosure - Financial Instruments - Summary of Cash Flows Hedge Exposures (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfCashFlowsHedgeExposures
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2350	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
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2352	Foreign exchange currency risk [member]	Member			fmx:ForeignExchangeCurrencyRiskMember
2353	Hedged items [axis]	Axis			ifrs-full:HedgedItemsAxis
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2356	Disclosure of detailed information about hedged items [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsLineItems
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2360	1161 - Disclosure - Financial Instruments - Summary of Cash Flows Financial Instruments Amounts and Its Related Non-effective Portion (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfCashFlowsFinancialInstrumentsAmountsAndItsRelatedNoneffectivePortion
2361	Disclosure of detailed information about hedged items [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsTable
2362	Types of hedges [axis]	Axis			ifrs-full:TypesOfHedgesAxis
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2365	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
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2367	Foreign exchange currency risk [member]	Member			fmx:ForeignExchangeCurrencyRiskMember
2368	Interest rate risk [member]	Member			ifrs-full:InterestRateRiskMember
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2370	Commodity price risk [member]	Member			ifrs-full:CommodityPriceRiskMember
2371	Hedged items [axis]	Axis			ifrs-full:HedgedItemsAxis
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2373	Net sales trade receivables and borrowings [member]	Member			fmx:NetSalesTradeReceivablesAndBorrowingsMember
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2379	Risk exposures [axis]	Axis			ifrs-full:RiskExposuresAxis
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2382	Sugar [member]	Member			fmx:SugarMember
2383	PX+MEG [member]	Member			fmx:PxMegMember
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2388	Financial position name in which is included the cash flow hedge	Concept (Text/String)	For Period		ifrs-full:DescriptionOfLineItemInStatementOfFinancialPositionThatIncludesHedgingInstrument
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2390	Non- effective portion recognized in profit and loss	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss
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2392	Hedging costs included in the OCI	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
2393	Amount of hedging reserve transfer to the cost of inventory	Concept (Monetary)	For Period	Credit	fmx:HedgingReserveTransferToCostOfInventory
2394	Amount of hedging reserve costs transfer to the cost of inventory	Concept (Monetary)	For Period	Credit	fmx:HedgingReserveCostsTransferToCostOfInventory
2395	Hedging reserve amount reclassified to profit and loss	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax
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2397	1162 - Disclosure - Financial Instruments - Reconciliation Per Category of Equity Components and Analysis of OCI Components, Net of Tax Generated by Cash Flow Hedges (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureFinancialInstrumentsReconciliationPerCategoryOfEquityComponentsAndAnalysisOfOCIComponentsNetOfTaxGeneratedByCashFlowHedges
2398	Disclosure of detailed information about hedged items [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsTable
2399	Reserves within equity [axis]	Axis			ifrs-full:ReservesWithinEquityAxis
2400	Other reserves [member]	Member			ifrs-full:OtherReservesMember
2401	Hedging reserve [member]	Member			ifrs-full:ReserveOfCashFlowHedgesMember
2402	Cost of hedging reserve [member]	Member			fmx:CostOfHedgingReserveMember
2403	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2404	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2405	Foreign exchange currency risk [member]	Member			fmx:ForeignExchangeCurrencyRiskMember
2406	Interest rate risk [member]	Member			ifrs-full:InterestRateRiskMember
2407	Hedged items [axis]	Axis			ifrs-full:HedgedItemsAxis
2408	Hedged items [member]	Member			ifrs-full:HedgedItemsMember
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2411	Disclosure of detailed information about hedged items [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsLineItems
2412	Balances at beginning of the period	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
2413	Fair value changes	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
2414	Taxes due to changes in reserves during the period	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
2415	Balances at the end of the period	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfCashFlowHedges
2416	1163 - Disclosure - Non-Controlling Interest in Consolidated Subsidiaries - Summary of Analysis of FEMSAs Non-Controlling Interest in its Consolidated Subsidiaries (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureNonControllingInterestInConsolidatedSubsidiariesSummaryOfAnalysisOfFEMSAsNonControllingInterestInItsConsolidatedSubsidiaries
2417	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [table]	Table	*	*	fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesTable
2418	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2419	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2420	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
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2422	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items]	LineItems			fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesLineItems
2423	Non controlling interest	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2424	1164 - Disclosure - Non-Controlling Interest in Consolidated Subsidiaries - Summary of Changes in FEMSA's Non-Controlling Interest (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureNonControllingInterestInConsolidatedSubsidiariesSummaryOfChangesInFEMSAsNonControllingInterest
2425	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [table]	Table	*	*	fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesTable
2426	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
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2428	Non-controlling interest [member]	Member			ifrs-full:NoncontrollingInterestsMember
2429	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
2430	Currently stated [member]	Member			ifrs-full:RestatedMember
2431	IAS 29 [member]	Member			fmx:IAS29Member
2432	Impact of adopting IFRS 9 [member]	Member			fmx:ImpactOfAdoptingIFRS9Member
2433	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items]	LineItems			fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesLineItems
2434	Balance at beginning of the period	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2435	Net income of non-controlling interest	Concept (Monetary)	For Period	Credit	fmx:NetIncomeOfNonControllingInterest
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2437	Exchange differences on translation of foreign operation	Concept (Monetary)	For Period	Credit	fmx:ExchangeDifferencesOnTranslationOfForeignOperations
2438	Remeasurements of the net defined benefits liability	Concept (Monetary)	For Period	Credit	fmx:RemeasurementOfNetDefinedBenefitsLiability
2439	Valuation of the effective portion of derivative financial instruments	Concept (Monetary)	For Period	Credit	fmx:ValuationOfEffectivePortionOfDerivativeFinancialInstruments
2440	Accounting standard adoption effects	Concept (Monetary)	For Period		ifrs-full:IncreaseDecreaseInAccountingEstimate
2441	Capitalization of issued shares to former owners of Vonpar in Coca-Cola FEMSA	Concept (Monetary)	For Period	Debit	fmx:CapitalisationOfIssuedSharesToFormerOwners
2442	Other acquisitions and remeasurements	Concept (Monetary)	For Period	Credit	fmx:OtherAcquisitionsAndRemeasurements
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2447	Balance at end of the period	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2448	1165 - Disclosure - Non-Controlling Interest in Consolidated Subsidiaries - Summary of Non-Controlling Interest's Accumulated Other Comprehensive Income (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureNonControllingInterestInConsolidatedSubsidiariesSummaryOfNonControllingInterestsAccumulatedOtherComprehensiveIncome
2449	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [table]	Table	*	*	fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesTable
2450	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
2451	Equity [member]	Member			ifrs-full:EquityMember
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2453	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items]	LineItems			fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesLineItems
2454	Exchange differences on translation foreign operation	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
2455	Remeasurements of the net defined benefits liability	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
2456	Valuation of the effective portion of derivative financial instruments	Concept (Monetary)	For Period	Credit	fmx:ValuationOfEffectivePortionOfDerivativeFinancialInstrumentsNetOfTax
2457	Accumulated other comprehensive income	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedOtherComprehensiveIncome
2458	1166 - Disclosure - Non-Controlling Interest in Consolidated Subsidiaries - Summary of Financial Information of Coca-Cola FEMSA (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureNonControllingInterestInConsolidatedSubsidiariesSummaryOfFinancialInformationOfCocaColaFEMSA
2459	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [table]	Table	*	*	fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesTable
2460	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2461	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2462	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
2463	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [line items]	LineItems			fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesLineItems
2464	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
2465	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
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2467	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
2468	Total revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
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2474	Net cash flow generated from operating activities from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations
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2477	Net cash flow from used in financing activities for continuing operations	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivitiesContinuingOperations
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2479	1167 - Disclosure - Non-Controlling Interest in Consolidated Subsidiaries - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureNonControllingInterestInConsolidatedSubsidiariesAdditionalInformation
2480	Disclosure Of Non Controlling Interest In Consolidated Subsidiaries [table]	Table	*	*	fmx:DisclosureOfNonControllingInterestInConsolidatedSubsidiariesTable
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2484	Solistica [member]	Member			fmx:SolisticaMember
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2489	1168 - Disclosure - Equity - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquityAdditionalInformation
2490	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
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2499	Coca Cola FEMSA [member]	Member			fmx:CocaColaFomentoEconomicoMexicanoSabdeCvMember
2500	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
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2528	1169 - Disclosure - Equity - Summary of Capital Stock (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquitySummaryOfCapitalStock
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2541	1170 - Disclosure - Equity - Summary of Dividends Declared and Paid (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEquitySummaryOfDividendsDeclaredAndPaid
2542	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
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2544	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2545	Coca Cola FEMSA [member]	Member			fmx:CocaColaFomentoEconomicoMexicanoSabdeCvMember
2546	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
2547	Equity [member]	Member			ifrs-full:EquityMember
2548	Series B shares [member]	Member			fmx:CommonStockSeriesBMember
2549	Series D shares [member]	Member			fmx:CommonStockSeriesDMember
2550	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
2551	Dividend declared and paid	Concept (Monetary)	As Of	Debit	fmx:DividendDeclaredAndPaid
2552	Dividend declared and paid per share	Concept (Share)	As Of		fmx:DividendDeclaredAndPaidPerShare
2553	1171 - Disclosure - Earnings per Share - Summary of Calculation of Basic and Diluted Earnings Per Share Amounts (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureEarningsPerShareSummaryOfCalculationOfBasicAndDilutedEarningsPerShareAmounts
2554	Earnings per share [table]	Table	*	*	ifrs-full:EarningsPerShareTable
2555	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
2556	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
2557	Series B shares [member]	Member			fmx:CommonStockSeriesBMember
2558	Series D shares [member]	Member			fmx:CommonStockSeriesDMember
2559	Earnings per share [line items]	LineItems			ifrs-full:EarningsPerShareLineItems
2560	Weighted average number of shares for basic earnings per share	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
2561	Effect of dilution associated with non-vested shares for share based payment plans	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
2562	Weighted average number of shares adjusted for the effect of dilution (Shares outstanding)	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
2563	Dividend rights per series (see Note 22.1)	Concept (Percent)	For Period		fmx:PercentageOfDividendRightsToBePaid
2564	Weighted average number of shares further adjusted to reflect dividend rights	Concept (Shares)	For Period		fmx:AdjustedWeightedAverageSharesFurtherAdjustedToReflectDividendRights
2565	Basic earnings per share from continuing operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromContinuingOperations
2566	Basic earnings per share from discontinued operations	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShareFromDiscontinuedOperations
2567	Diluted earnings per share from continuing operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromContinuingOperations
2568	Diluted earnings per share from discontinued operations	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShareFromDiscontinuedOperations
2569	Allocation of earnings, weighted	Concept (Percent)	For Period		fmx:AllocationOfEarningsPercentageWeightedAverage
2570	Net controlling interest income allocated from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeFromContinuingOperationsAttributableToOwnersOfParent
2571	Net controlling interest income allocated from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeFromDiscontinuedOperationsAttributableToOwnersOfParent
2572	1172 - Disclosure - Income Taxes - Additional Information (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation
2573	Disclosure Of Income Taxes [table]	Table	*	*	fmx:DisclosureOfIncomeTaxesTable
2574	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2575	Non-adjusting Events After Reporting Period [Member]	Member			ifrs-full:NonadjustingEventsMember
2576	Changes in tax rates or tax laws enacted or announced [member]	Member			ifrs-full:ChangesInTaxRatesOrTaxLawsEnactedOrAnnouncedMember
2577	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2578	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2579	Mato Grosso do Sul [member]	Member			fmx:MatoGrossoDoSulMember
2580	Rio Grande do Sul [member]	Member			fmx:RioGrandeDoSulMember
2581	Minas Gerais [member]	Member			fmx:MinasGeraisMember
2582	Rio de Janeiro [member]	Member			fmx:RioDeJaneiroMember
2583	Parana [member]	Member			fmx:ParanaMember
2584	Argentina [member]	Member			country:AR
2585	Colombia [member]	Member			country:CO
2586	Costa Rica [member]	Member			country:CR
2587	Range [axis]	Axis			ifrs-full:RangeAxis
2588	Ranges [member]	Member			ifrs-full:RangesMember
2589	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
2590	Top of range [member]	Member			ifrs-full:TopOfRangeMember
2591	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2592	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2593	Less than 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
2594	Later than one year [member]	Member			ifrs-full:LaterThanOneYearMember
2595	Later than two year [member]	Member			fmx:LaterThanTwoYearMember
2596	1-4 months [member]	Member			fmx:LaterThanOneMonthAndNotLaterThanFourMonthsMember
2597	1-6 months [member]	Member			ifrs-full:LaterThanOneMonthAndNotLaterThanSixMonthsMember
2598	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2599	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2600	Coca Cola FEMSA [member]	Member			fmx:CocaColaFomentoEconomicoMexicanoSabdeCvMember
2601	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2602	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2603	Sales taxes in the province of Buenos Aires [member]	Member			fmx:SalesTaxesInTheProvinceOfBuenosAiresMember
2604	Sales Tax in City of Buenos Aires [member]	Member			fmx:SalesTaxInCityOfBuenosAiresMember
2605	Disclosure of income taxes [Line Items]	LineItems			fmx:DisclosureOfIncomeTaxesLineItems
2606	Income tax rate	Concept (Percent)	For Period		fmx:PercentageOfIncomeTaxRate
2607	Percentage of reform income tax rate	Concept (Percent)	For Period		fmx:PercentageOfReformIncomeTaxRate
2608	Minimum assumed income tax rate	Concept (Percent)	For Period		fmx:MinimumAssumedIncomeTaxRate
2609	Capitalization ratio	Concept (Percent)	As Of		fmx:CapitalizationRatio
2610	Municipality sales tax credited against payable income tax	Concept (Percent)	For Period		ifrs-full:TaxRateEffectOfRevenuesExemptFromTaxation
2611	New tax on dividends paid to non-resident stockholders and resident individuals	Concept (Percent)	As Of		fmx:DividendRate
2612	Value-added tax	Concept (Percent)	For Period		fmx:ValueAddedTaxPercentage
2613	Percentage of capital gains	Concept (Percent)	For Period		fmx:PercentageOfCapitalGainTaxRate
2614	Percentage of withholding taxes on salaries of employees	Concept (Percent)	For Period		fmx:PercentageOfWithholdingTaxesOnSalariesOfEmployees
2615	Percentage of withholding taxes on compensations of employees	Concept (Percent)	For Period		fmx:PercentageOfWithholdingTaxesOnCompensationsOfEmployees
2616	Percentage of tax rate that exceeds EBITDA	Concept (Percent)	For Period		fmx:PercentageOfTaxRateThatExceedsEBITDA
2617	Income tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
2618	Percentage of reduction in excise tax	Concept (Percent)	For Period		fmx:PercentageOfReductionInExciseTaxRate
2619	Percentage of increase in excise tax	Concept (Percent)	For Period		fmx:PercentageOfIncreaseInExciseTaxRate
2620	Percentage of reform extra income tax rate	Concept (Percent)	For Period		fmx:PercentageOfReformExtraIncomeTaxRate
2621	Percentage of special increase in income tax rate	Concept (Percent)	For Period		fmx:PercentageOfSpecialIncreaseInIncomeTaxRate
2622	Percentage of dividend received from Columbian residents withholding	Concept (Percent)	For Period		fmx:PercentageOfDividendReceivedFromColombianResidentsWithholding
2623	Percentage of dividend received from colombian non residents withholding	Concept (Percent)	For Period		fmx:PercentageOfDividendReceivedFromColombianNonResidentsWithholding
2624	Percentage of increase in income tax rate	Concept (Percent)	For Period		fmx:PercentageOfIncreaseInIncomeTaxRate
2625	Percentage of Increase in value-added tax rate	Concept (Percent)	For Period		fmx:PercentageOfIncreaseInValueAddedTaxRate
2626	Remaining percentage of value added tax	Concept (Percent)	For Period		fmx:RemaningPercentageOfValueAddedTax
2627	Additional Contribution to poverty eradication	Concept (Percent)	For Period		fmx:AdditionalTaxForTheContributionOfPovertyEradicationFund
2628	Percentage of contribution to poverty eradication	Concept (Percent)	For Period		fmx:PercentageOfContributionToPovertyEradication
2629	Percentage of contribution to poverty eradication charged on sales to non-taxpayers	Concept (Percent)	For Period		fmx:PercentageOfContributionToPovertyEradicationChargedOnSales
2630	Percentage of average federal production and federal sales tax	Concept (Percent)	For Period		fmx:PercentageOfAverageFederalProductionAndFederalSalesTaxOverNetSales
2631	NOLs usage limit	Concept (Percent)	For Period		fmx:NetOperatingLossUsageLimit
2632	Withholding taxes associated with payment of dividends	Concept (Monetary)	For Period	Debit	fmx:WithholdingTaxesAssociatedWithPaymentOfDividends
2633	Temporary differences associated with investments	Concept (Monetary)	As Of		ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
2634	1173 - Disclosure - Income Taxes - Summary of Major Components of Income Tax Expense (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesSummaryOfMajorComponentsOfIncomeTaxExpense
2635	Implied Table	Table	*	*	implied:Table
2636	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2637	Current tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
2638	Deferred tax expense:	Abstract			ifrs-full:DeferredTaxExpenseIncomeAbstract
2639	Origination and reversal of temporary differences	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
2640	(Recognition) of tax losses, net	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxExpenseRecognitionApplicationOfTaxLossesNet
2641	Change in the statutory rate	Concept (Monetary)	For Period	Debit	fmx:IncomeTaxesChangesInStatutoryRates
2642	Total deferred tax income	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxExpenseIncomeCurrent
2643	Total	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
2644	1174 - Disclosure - Income Taxes - Schedule of Recognized in Consolidated Statement of Other Comprehensive Income (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfRecognizedInConsolidatedStatementOfOtherComprehensiveIncome
2645	Implied Table	Table	*	*	implied:Table
2646	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2647	Unrealized loss on cash flow hedges	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
2648	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome
2649	Remeasurements of the net defined benefit liability	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
2650	Share of the other comprehensive income of equity accounted investees	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLoss
2651	Total income tax cost recognized in OCI	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
2652	1175 - Disclosure - Income Taxes - Schedule of Domestic Tax Rate (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfDomesticTaxRate
2653	Implied Table	Table	*	*	implied:Table
2654	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2655	Mexican statutory income tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
2656	Difference between book and tax inflationary values and translation effects	Concept (Percent)	For Period		fmx:PercentageOfTaxEffectFromDifferenceBetweenBookAndTaxInflationaryValuesAndTranslationEffects
2657	Annual inflation tax adjustment	Concept (Percent)	For Period		fmx:TaxRateEffectOfAnnualInflationTaxAdjustment
2658	Difference between statutory income tax rates	Concept (Percent)	For Period		fmx:PercentageOfDifferencesBetweenStatutoryTaxRate
2659	Repatriation of capital benefit decree	Concept (Percent)	For Period		fmx:RepatriationOfCapitalBenefitDecreePercentage
2660	Non-deductible expenses	Concept (Percent)	For Period		fmx:PercentageOfNonDeductibleExpenses
2661	Non-taxable income	Concept (Percent)	For Period		fmx:PercentageOfTaxableNonTaxableIncomeNet
2662	Effect of changes in Argentina tax law	Concept (Percent)	For Period		fmx:PercentageOfEffectOfChangesInArgentinaTaxLaw
2663	Income tax credits	Concept (Percent)	For Period		fmx:PercentageOfTaxEffectOfIncomeTaxCredits
2664	Venezuela deconsolidation effect	Concept (Percent)	For Period		fmx:PercentageOfVenezuelaDesconsolidationEffect
2665	Others	Concept (Percent)	For Period		fmx:PercentageOfOtherTaxRate
2666	Total	Concept (Percent)	For Period		fmx:PercentageOfDomesticTaxRate
2667	1176 - Disclosure - Income Taxes - Schedule of Deferred Income Tax (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfDeferredIncomeTax
2668	Disclosure Of Income Taxes [table]	Table	*	*	fmx:DisclosureOfIncomeTaxesTable
2669	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2670	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2671	Allowance for doubtful accounts [member]	Member			fmx:AllowanceForDoubtfulAccountsMember
2672	Inventory [member]	Member			fmx:InventoryMember
2673	Other current assets [member]	Member			fmx:OtherCurrentAssetsMember
2674	Property, plant and equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
2675	Investments in equity accounted investees [member]	Member			ifrs-full:InvestmentsAccountedForUsingEquityMethodMember
2676	Other assets [member]	Member			ifrs-full:OtherAssetsMember
2677	Finite useful lived intangible assets [Member]	Member			fmx:FiniteUsefulLivedIntangibleAssetsMember
2678	Indefinite lived intangible assets [Member]	Member			fmx:IndefiniteLivedIntangibleAssets1Member
2679	Post-employment and other long-term employee benefits [Member]	Member			fmx:PostEmploymentAndOtherLongTermEmployeeBenefitsMember
2680	Derivative financial instruments [Member]	Member			fmx:DerivativeFinancialInstrumentsMember
2681	Provisions [Member]	Member			fmx:ProvisionsMember
2682	Temporary non-deductible provision [Member]	Member			fmx:TemporaryNonDeductibleProvisionMember
2683	Employee profit sharing payable [Member]	Member			fmx:EmployeeProfitSharingPayableMember
2684	Tax loss carry forwards [Member]	Member			fmx:TaxLossCarryForwardsMember
2685	Tax credits to recover [Member]	Member			fmx:TaxCreditsToRecoverMember
2686	Other comprehensive income [member]	Member			ifrs-full:AccumulatedOtherComprehensiveIncomeMember
2687	Exchange differences on translation of foreign operations in OCI [member]	Member			fmx:ExchangeDifferencesOnTranslationOfForeignOperationsInOciMember
2688	Other liabilities [member]	Member			fmx:OtherLiabilitiesMember
2689	Disclosure of income taxes [Line Items]	LineItems			fmx:DisclosureOfIncomeTaxesLineItems
2690	Deferred income taxes, net	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
2691	Deferred tax asset	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
2692	Deferred tax liability	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
2693	Deferred income tax related to consolidated statement of income	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
2694	Deferred tax income net recorded in share of the profit of equity accounted investees	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxExpenseIncomeNetRecordedInShareOfProfitOfEquityAccountedInvestees
2695	Deferred tax income, net	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
2696	1177 - Disclosure - Income Taxes - Schedule of Deferred Income Tax (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfDeferredIncomeTaxParenthetical
2697	Disclosure Of Income Taxes [table]	Table	*	*	fmx:DisclosureOfIncomeTaxesTable
2698	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2699	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2700	Venezuela [member]	Member			country:VE
2701	Disclosure of income taxes [Line Items]	LineItems			fmx:DisclosureOfIncomeTaxesLineItems
2702	Deferred tax recovery period	Concept (xbrli:durationItemType)	For Period		fmx:DeferredTaxRecoveryPeriod
2703	Deferred tax liability	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
2704	1178 - Disclosure - Income Taxes - Schedule of Deferred Tax related to Other Comprehensive Income (AOCI) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfDeferredTaxRelatedToOtherComprehensiveIncomeAOCI
2705	Implied Table	Table	*	*	implied:Table
2706	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2707	Unrealized loss on derivative financial instruments	Concept (Monetary)	For Period	Debit	fmx:UnrealizedLossesOnDerivativeFinancialInstrumentsAccumulatedOtherComprehensiveIncome
2708	Remeasurements of the net defined benefit liability	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxRelatingToRemeasurementsOfDefinedBenefitLiabilityAccumulatedOtherComprehensiveIncome
2709	Total deferred tax loss related to AOCI	Concept (Monetary)	For Period	Credit	fmx:DeferredTaxExpenseIncomeRelatingToComponentsOfAccumulatedOtherComprehensiveIncome
2710	1179 - Disclosure - Income Taxes - Schedule of Changes in Net Deferred Income Tax Asset (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfChangesInNetDeferredIncomeTaxAsset
2711	Implied Table	Table	*	*	implied:Table
2712	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2713	Balance at the beginning of the period	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
2714	Deferred tax provision for the period	Concept (Monetary)	As Of	Debit	fmx:DeferredTaxAssetsRelatingToProvisions
2715	Deferred tax income net recorded in share of the profit of equity accounted investees	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxIncomeNetRecordedInShareOfTheProfitOfEquityAccountedInvestees
2716	Acquisition of subsidiaries (see Note 4)	Concept (Monetary)	For Period	Debit	fmx:DeferredIncomeTaxAssetAcquisitionOfSubsidiaries
2717	Unrealized loss on cash flow hedges	Concept (Monetary)	For Period	Debit	fmx:IncomeTaxRelatingUnrealizedGainLossOnDerivativeFinancialInstruments
2718	Exchange differences on translation of foreign operations	Concept (Monetary)	As Of	Debit	fmx:DeferredTaxAssetsUnrealizedExchangeGainsLosses
2719	Remeasurements of the net defined benefit liability	Concept (Monetary)	For Period	Credit	fmx:RemeasurementOfNetDefinedEmployeeBenefitLiability
2720	Retained earnings of equity accounted investees	Concept (Monetary)	For Period	Credit	fmx:RetainedEarningsOfEquityAccountedInvestees
2721	Cash flow hedges in foreign investments	Concept (Monetary)	For Period	Credit	fmx:ChangeInDeferredTaxAssetsRelatingToCashFlowHedgesInForeignInvestments
2722	Restatement effect of the period and beginning balances associated with hyperinflationary economies	Concept (Monetary)	For Period	Credit	fmx:AdjustmentsForMonetaryPositionGainLossNet
2723	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	fmx:ChangeInDeferredTaxAssetsRelatingToDisposalOfSubsidiaries
2724	Deconsolidation of subsidiaries	Concept (Monetary)	For Period	Credit	fmx:DeconsolidationOfSubsidiaries
2725	Balance at the end of the period	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
2726	1180 - Disclosure - Income Taxes - Schedule of Tax Loss Carryforwards (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfTaxLossCarryforwards
2727	Implied Table	Table	*	*	implied:Table
2728	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2729	2019	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearOne
2730	2020	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearTwo
2731	2021	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearThree
2732	2022	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearFour
2733	2023	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearFive
2734	2024	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearSix
2735	2025	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearSeven
2736	2026	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearEight
2737	2027	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearNine
2738	2028 and thereafter	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarriedForwardWhichExpireInYearTenAndThereafter
2739	No expiration (Brazil and Colombia)	Concept (Monetary)	As Of	Debit	fmx:UnrecognizedDeferredTaxAssetsTaxLossCarryForwardWithNoExpiration
2740	Tax Loss Carryforwards	Concept (Monetary)	As Of	Debit	fmx:TaxLossesCarryforward
2741	1181 - Disclosure - Income Taxes - Schedule of Changes in Balance of Tax Loss Carryforwards (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureIncomeTaxesScheduleOfChangesInBalanceOfTaxLossCarryforwards
2742	Implied Table	Table	*	*	implied:Table
2743	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2744	Balance at beginning of the period	Concept (Monetary)	As Of	Debit	fmx:DeferredTaxAssetsOperatingLossCarryForwards1
2745	Reserved	Concept (Monetary)	As Of	Credit	fmx:DeferredTaxAssetsOperatingLossCarryForwardsProvisions
2746	Additions	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxAssetsOperatingLossCarryForwardsAdditions
2747	Usage of tax losses	Concept (Monetary)	For Period	Credit	fmx:DeferredTaxAssetsOperatingLossCarryForwardsUsageOfTaxLosses
2748	Translation effect of beginning balances	Concept (Monetary)	For Period	Debit	fmx:DeferredTaxAssetsOperatingLossCarryForwardsForeignCurrencyTranslation
2749	Balance at end of the period	Concept (Monetary)	As Of	Debit	fmx:DeferredTaxAssetsOperatingLossCarryForwards1
2750	1182 - Disclosure - Other Liabilities, Provisions, Contingencies and Commitments - Other Current Financial Liabilities (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherLiabilitiesProvisionsContingenciesAndCommitmentsOtherCurrentFinancialLiabilities
2751	Implied Table	Table	*	*	implied:Table
2752	Disclosure of financial liabilities [abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
2753	Sundry creditors	Concept (Monetary)	As Of	Credit	fmx:CurrentSundryCreditors
2754	Derivative financial instruments (see Note 20)	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDerivativeFinancialLiabilities
2755	Others	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilitiesAtAmortisedCost
2756	Total	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentFinancialLiabilities
2757	1183 - Disclosure - Other Liabilities, Provisions, Contingencies and Commitments - Schedule of Provisions and Other Non-Current Liabilities (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherLiabilitiesProvisionsContingenciesAndCommitmentsScheduleOfProvisionsAndOtherNonCurrentLiabilities
2758	Implied Table	Table	*	*	implied:Table
2759	Disclosure of financial liabilities [abstract]	Abstract			ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
2760	Contingencies	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
2761	Payable taxes	Concept (Monetary)	As Of	Credit	fmx:TaxesPayable
2762	Others	Concept (Monetary)	As Of	Credit	fmx:OthersProvisionsAndOtherLongTermLiabilities
2763	Total	Concept (Monetary)	As Of	Credit	fmx:ProvisionsAndOtherLongTermLiabilities
2764	1184 - Disclosure - Other Liabilities, Provisions, Contingencies and Commitments - Other Financial Liabilities (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherLiabilitiesProvisionsContingenciesAndCommitmentsOtherFinancialLiabilities
2765	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2766	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
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2768	Derivative financial instruments [Member]	Member			fmx:DerivativeFinancialInstrumentsMember
2769	Security deposits [Member]	Member			fmx:SecurityDepositsMember
2770	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2771	Other financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherFinancialLiabilities
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2773	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
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2776	Indirect taxes [member]	Member			fmx:IndirectTaxesMember
2777	Labor [member]	Member			fmx:LaborMember
2778	Legal [member]	Member			ifrs-full:LegalProceedingsProvisionMember
2779	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2780	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
2781	1186 - Disclosure - Other Liabilities, Provisions, Contingencies and Commitments - Changes in Balance of Provisions Recorded (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherLiabilitiesProvisionsContingenciesAndCommitmentsChangesInBalanceOfProvisionsRecorded
2782	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2783	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
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2785	Indirect taxes [member]	Member			fmx:IndirectTaxesMember
2786	Labor [member]	Member			fmx:LaborMember
2787	Legal [member]	Member			ifrs-full:LegalProceedingsProvisionMember
2788	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2789	Balance at beginning of the period	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
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2792	Contingencies added in business combination	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInExistingLiabilitiesContingentLiabilitiesRecognisedInBusinessCombination
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2799	Balance at end of the period	Concept (Monetary)	As Of	Credit	ifrs-full:Provisions
2800	1187 - Disclosure - Other Liabilities, Provisions, Contingencies and Commitments - Changes in Balance of Provisions Recorded (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureOtherLiabilitiesProvisionsContingenciesAndCommitmentsChangesInBalanceOfProvisionsRecordedParenthetical
2801	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2802	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
2803	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
2804	Indirect taxes [member]	Member			fmx:IndirectTaxesMember
2805	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2806	Tax claims	Concept (Monetary)	For Period	Credit	fmx:TaxesPayableDueInTaxClaims
2807	Deductibility of a tax goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
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2809	Indemnifiable assets	Concept (Monetary)	As Of	Debit	fmx:IndemnifiableAssetsFromBusinessCombination
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2811	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2812	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2813	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2814	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
2815	Heineken [member]	Member			fmx:HeinekenGroupMember
2816	Items of contingent liabilities [axis]	Axis			ifrs-full:ItemsOfContingentLiabilitiesAxis
2817	Items of contingent liabilities [member]	Member			ifrs-full:ItemsOfContingentLiabilitiesMember
2818	ICMS [member]	Member			fmx:OtherTaxAuthorityMember
2819	Tax credits [member]	Member			fmx:TaxCreditsMember
2820	Federal taxes [member]	Member			fmx:FederalTaxesMember
2821	Value added tax [member]	Member			fmx:ValueAddedTaxMember
2822	Unsettled [member]	Member			fmx:UnsettledMember
2823	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2824	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2825	Brazil [member]	Member			country:BR
2826	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2827	Aggregate amount claimed against company	Concept (Monetary)	For Period	Debit	fmx:LossContingencyDamagesSoughtValue1
2828	Tax contingencies amount	Concept (Monetary)	As Of	Credit	fmx:TaxContingenciesAmount
2829	Unsettled indirect tax contingencies	Concept (Monetary)	As Of	Credit	fmx:IndirectTaxContingenciesAmount
2830	Litigation amount	Concept (Monetary)	For Period	Debit	fmx:LitigationSettlementAmount1
2831	Rental expense	Concept (Monetary)	For Period	Debit	ifrs-full:RentalExpense
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2833	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2834	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2835	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2836	Less than 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
2837	1-5 years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
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2839	Currency [Axis]	Axis			srt:CurrencyAxis
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2844	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2845	Contractual maturities of operating lease commitments	Concept (Monetary)	As Of	Debit	ifrs-full:UndiscountedOperatingLeasePaymentsToBeReceived
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2847	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
2848	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2849	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2850	Less than 1 year [member]	Member			ifrs-full:NotLaterThanOneYearMember
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2852	Arrangements involving legal form of lease [axis]	Axis			ifrs-full:ArrangementsInvolvingLegalFormOfLeaseAxis
2853	Arrangements involving legal form of lease [member]	Member			ifrs-full:ArrangementsInvolvingLegalFormOfLeaseMember
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2855	Disclosure of financial liabilities [line items]	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2856	Minimum payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayable
2857	Less amount representing finance charges	Concept (Monetary)	As Of	Credit	ifrs-full:FutureFinanceChargeOnFinanceLease
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2860	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
2861	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
2862	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2863	Operating segments [member]	Member			ifrs-full:OperatingSegmentsMember
2864	Consolidation adjustments [member]	Member			ifrs-full:MaterialReconcilingItemsMember
2865	Segments [axis]	Axis			ifrs-full:SegmentsAxis
2866	Segments [member]	Member			ifrs-full:SegmentsMember
2867	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
2868	FEMSA comercio proximity division [member]	Member			fmx:FEMSAProximityDivisionMember
2869	FEMSA Comercio Health Retail Division [member]	Member			fmx:FEMSAHealthRetailDivisionMember
2870	FEMSA Comercio Fuel Retail Division [member]	Member			fmx:FEMSAFuelRetailDivisionMember
2871	Heineken investment [member]	Member			fmx:HeinekenInvestmentMember
2872	Other [member]	Member			fmx:OthersMember
2873	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
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2875	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
2876	Administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AdministrativeExpense
2877	Selling expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SalesAndMarketingExpense
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2889	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
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2891	Investments in equity accounted investees	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
2892	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
2893	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
2894	Investments in fixed assets	Concept (Monetary)	As Of	Debit	fmx:InvestmentsInFixedAssets
2895	1192 - Disclosure - Information by Segment - Summary of Inter Segment Policies for Segment (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInformationBySegmentSummaryOfInterSegmentPoliciesForSegmentParenthetical
2896	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
2897	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2898	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2899	Mexico and Central America [member]	Member			fmx:MexicoAndCentralAmericaMember
2900	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
2901	Assets of discontinued operations	Concept (Monetary)	As Of	Debit	fmx:AssetsDiscontinuedOperations
2902	Liabilities of discontinued operations	Concept (Monetary)	As Of	Credit	fmx:LiabilitiesDiscontinuedOperations
2903	1193 - Disclosure - Information by Segment - Summary of Geographic Disclosure (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInformationBySegmentSummaryOfGeographicDisclosure
2904	Disclosure of geographical areas [table]	Table	*	*	ifrs-full:DisclosureOfGeographicalAreasTable
2905	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2906	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2907	Mexico and Central America [member]	Member			fmx:MexicoAndCentralAmericaMember
2908	Asia [Member]	Member			srt:AsiaMember
2909	South America [member]	Member			srt:SouthAmericaMember
2910	Europe [member]	Member			srt:EuropeMember
2911	Disclosure of geographical areas [line items]	LineItems			ifrs-full:DisclosureOfGeographicalAreasLineItems
2912	Total Non Current Assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
2913	1194 - Disclosure - Information by Segment - Summary of Geographic Disclosure (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureInformationBySegmentSummaryOfGeographicDisclosureParenthetical
2914	Disclosure of geographical areas [table]	Table	*	*	ifrs-full:DisclosureOfGeographicalAreasTable
2915	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2916	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2917	Mexico [member]	Member			country:MX
2918	Brazil [member]	Member			country:BR
2919	Colombia [member]	Member			country:CO
2920	Argentina [member]	Member			country:AR
2921	Chile [member]	Member			country:CL
2922	Uruguay [member]	Member			country:UY
2923	Disclosure of geographical areas [line items]	LineItems			ifrs-full:DisclosureOfGeographicalAreasLineItems
2924	Total Non Current Assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
2925	1195 - Disclosure - Revenue - Summary of Disaggregation of Revenue by Geographic Area, Business Unit and Products and Services Categories (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureRevenueSummaryOfDisaggregationOfRevenueByGeographicAreaBusinessUnitAndProductsAndServicesCategories
2926	Disclosure of disaggregation of revenue from contracts with customers [table]	Table	*	*	ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
2927	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
2928	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
2929	Operating segments [member]	Member			ifrs-full:OperatingSegmentsMember
2930	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
2931	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
2932	Total revenues [member]	Member			fmx:RevenueMember
2933	Consolidation adjustments [member]	Member			fmx:ConsolidationAdjustmentsMember
2934	Segments [axis]	Axis			ifrs-full:SegmentsAxis
2935	Segments [member]	Member			ifrs-full:SegmentsMember
2936	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
2937	FEMSA Comercio Proximity Division [member]	Member			fmx:FemsaComercioProximityDivisionMember
2938	FEMSA Comercio Health Retail Division [member]	Member			fmx:FEMSAHealthRetailDivisionMember
2939	FEMSA Comercio Fuel Retail Division [member]	Member			fmx:FEMSAFuelRetailDivisionMember
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2941	Timing of transfer of goods or services [axis]	Axis			ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
2942	Timing of transfer of goods or services [member]	Member			ifrs-full:TimingOfTransferOfGoodsOrServicesMember
2943	Goods or services transferred at point in time [member]	Member			ifrs-full:GoodsOrServicesTransferredAtPointInTimeMember
2944	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
2945	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
2946	Mexico and Central America [member]	Member			fmx:MexicoAndCentralAmericaMember
2947	South America [member]	Member			srt:SouthAmericaMember
2948	Venezuela [member]	Member			country:VE
2949	Disclosure of disaggregation of revenue from contracts with customers [line items]	LineItems			ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
2950	Consolidated revenues	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
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2952	Services revenues	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServices
2953	1196 - Disclosure - Revenue - Summary of Disaggregation of Revenue by Geographic Area, Business Unit and Products and Services Categories (Parenthetical) (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureRevenueSummaryOfDisaggregationOfRevenueByGeographicAreaBusinessUnitAndProductsAndServicesCategoriesParenthetical
2954	Disclosure of disaggregation of revenue from contracts with customers [table]	Table	*	*	ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
2955	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
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2958	Brazil [member]	Member			country:BR
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2960	Argentina [member]	Member			country:AR
2961	Chile [member]	Member			country:CL
2962	Uruguay [member]	Member			country:UY
2963	Disclosure of disaggregation of revenue from contracts with customers [line items]	LineItems			ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
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2966	Implied Table	Table	*	*	implied:Table
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2990	Series D shareholders [member]	Member			fmx:SeriesDShareholdersMember
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2994	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2995	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2996	Coca-Cola FEMSA [member]	Member			fmx:CocaColaFEMSAMember
2997	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
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3000	Series D shares [member]	Member			fmx:SeriesDSharesMember
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3015	Disclosure of non-adjusting events after reporting period [table]	Table	*	*	ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
3016	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
3017	Non-adjusting Events After Reporting Period [Member]	Member			ifrs-full:NonadjustingEventsMember
3018	Major ordinary share transactions prior to stock split [member]	Member			fmx:MajorOrdinaryShareTransactionsPriorToStockSplitMember
3019	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
3020	Ordinary shares [member]	Member			ifrs-full:OrdinarySharesMember
3021	Series A shares [member]	Member			fmx:SeriesASharesMember
3022	Series D shares [member]	Member			fmx:SeriesDSharesMember
3023	Series L share [member]	Member			fmx:SeriesLShareMember
3024	Disclosure of non-adjusting events after reporting period [line items]	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
3025	Shareholders	Concept (Text/String)	For Period		ifrs-full:NameOfSubsidiary
3026	Outstanding shares	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
3027	% of the capital stock	Concept (Percent)	As Of		fmx:PercentageOfCapitalStock
3028	% of rdinary shares with full voting rights	Concept (Percent)	For Period		fmx:PercentageOfOrdinaryShareWithFullVotingRights
3029	1201 - Disclosure - Subsequent Events - Schedule of Outstanding Shares Immediately After Stock Split (Detail)	Network	*	*	http://www.femsa.com/taxonomy/role/DisclosureSubsequentEventsScheduleOfOutstandingSharesImmediatelyAfterStockSplit
3030	Disclosure of non-adjusting events after reporting period [table]	Table	*	*	ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
3031	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
3032	Non-adjusting Events After Reporting Period [Member]	Member			ifrs-full:NonadjustingEventsMember
3033	Major ordinary share transactions after stock split [member]	Member			fmx:MajorOrdinaryShareTransactionsAfterStockSplitMember
3034	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
3035	Ordinary shares [member]	Member			ifrs-full:OrdinarySharesMember
3036	Series A shares [member]	Member			fmx:SeriesASharesMember
3037	Series D shares [member]	Member			fmx:SeriesDSharesMember
3038	Series B shares [member]	Member			fmx:SeriesBSharesMember
3039	Series L share [member]	Member			fmx:SeriesLShareMember
3040	Disclosure of non-adjusting events after reporting period [line items]	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
3041	Shareholders	Concept (Text/String)	For Period		ifrs-full:NameOfSubsidiary
3042	Outstanding shares	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
3043	% of the capital stock	Concept (Percent)	As Of		fmx:PercentageOfCapitalStock
3044	% of ordinary shares with full voting rights	Concept (Percent)	For Period		fmx:PercentageOfOrdinaryShareWithFullVotingRights