GRUPO TMM SAB (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 000100 - Document - Document and Entity Information Network

*

*

 http://tmm.com.mx/role/DocumentAndEntityInformation
2 Implied Table Table

*

*

 implied:Table
3 Document and Entity Information [Abstract] Abstract gtmay:DocumentAndEntityInformationAbstract
4 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
5 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
6 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
7 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
8 Entity Voluntary Filers Concept (Yes/No) For Period dei:EntityVoluntaryFilers
9 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
10 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
11 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
12 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
13 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
14 Document Type Concept (Submission Type) For Period dei:DocumentType
15 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
16 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
17 010000 - Statement - Consolidated statements of financial position Network

*

*

 http://tmm.com.mx/role/ConsolidatedStatementsOfFinancialPosition
18 Implied Table Table

*

*

 implied:Table
19 Consolidated statements of financial position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
20 Assets Abstract ifrs-full:AssetsAbstract
21 Current Abstract ifrs-full:CurrentAssetsAbstract
22 Cash and cash equivalents (Note 6) Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
23 Trade receivables, net (Note 7) Concept (Monetary) As Of Debit gtmay:TradeReceivablesNet
24 Other accounts receivable (Note 8) Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
25 Related parties (Note 19) Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
26 Materials and supplies (Note 9) Concept (Monetary) As Of Debit ifrs-full:Inventories
27 Prepayments (Note 10) Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
28 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
29 Non-current Abstract ifrs-full:NoncurrentAssetsAbstract
30 Property, vessels and equipment, net (Note 13) Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
31 Concession rights, net (Note 12) Concept (Monetary) As Of Debit gtmay:ConcessionalRightsNet
32 Other non-current assets (Note 14) Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
33 Intangible assets (Note 15) Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
34 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
35 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
36 Liabilities Abstract ifrs-full:LiabilitiesAbstract
37 Short-term Abstract ifrs-full:CurrentLiabilitiesAbstract
38 Short-term portion of the financial debt (Note 17) Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
39 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
40 Accounts payable and accrued expenses (Note 20) Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
41 Related parties (Note 19) Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
42 Total short-term liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
43 Long-term Abstract ifrs-full:NoncurrentLiabilitiesAbstract
44 Long-term portion of the financial debt (Note 17) Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
45 Employee benefits (Note 26) Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
46 Deferred income tax (Note 24) Concept (Monetary) As Of Credit ifrs-full:NetDeferredTaxLiabilities
47 Total long-term liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
48 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
49 Stockholders' equity (Note 21): Abstract ifrs-full:EquityAbstract
50 Share capital (103,760,541 shares authorized and issued) Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
51 Treasury shares (1,577,700 shares) Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
52 Mandatorily convertible debentures into shares (Note 18) Concept (Monetary) As Of Credit gtmay:MandatoryConvertibleDebenturesIssuedShares
53 Other components of equity Concept (Monetary) As Of Credit ifrs-full:OtherEquityInterest
54 Accumulated losses Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
55 Controlling interest Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
56 Non-controlling interest (Note 3.1) Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
57 Total stockholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
58 Total liabilities and stockholders' equity Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
59 010100 - Statement - Consolidated statements of financial position (Parenthetical) Network

*

*

 http://tmm.com.mx/role/ConsolidatedStatementsOfFinancialPositionParenthetical
60 Implied Table Table

*

*

 implied:Table
61 Consolidated statements of financial position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
62 Stockholders' equity Abstract ifrs-full:EquityAbstract
63 Common stock, shares authorized (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
64 Common stock, shares issued (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
65 Treasury shares (in shares) Concept (Shares) As Of gtmay:NumberOfTreasuryShares
66 020000 - Statement - Consolidated statements of profit or loss Network

*

*

 http://tmm.com.mx/role/ConsolidatedStatementsOfProfitOrLoss
67 Implied Table Table

*

*

 implied:Table
68 Consolidated statements of profit or loss [Abstract] Abstract ifrs-full:IncomeStatementAbstract
69 Revenue from transportation Concept (Monetary) For Period Credit ifrs-full:Revenue
70 Costs and expenses: Abstract gtmay:ExpensesAndCostsAbstract
71 Salaries, wages and employee benefits Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
72 Leases Concept (Monetary) For Period Debit gtmay:LeasesExpense
73 Contracted services Concept (Monetary) For Period Debit gtmay:ContractedServicesExpense
74 Fuel, materials and supplies Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
75 Depreciation, amortization and loss from revaluation Concept (Monetary) For Period Debit ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
76 Other costs and expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
77 Total costs and expenses Concept (Monetary) For Period Debit ifrs-full:ExpenseByNature
78 Transportation (loss) profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
79 Other income, net (Note 22) Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
80 Operating income Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
81 Comprehensive financing cost: Abstract gtmay:ComprehensiveFinancingCostsAbstract
82 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
83 Interest expense and other financial costs (Note 23) Concept (Monetary) For Period Debit gtmay:InterestExpenseAndOtherFinanceCosts
84 Exchange (loss) gain, net Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
85 Total comprehensive financing cost Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
86 Profit (loss) before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
87 Income tax (expense) benefit (Note 24) Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
88 Profit (loss) before discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
89 Loss on discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
90 Net profit (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
91 Attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
92 Non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
93 Controlling interest Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
94 Basic and diluted profit (loss) per share (Note 27) Abstract ifrs-full:BasicEarningsPerShareAbstract
95 Profit (loss) per share for the year from continuing operations (in pesos per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShareFromContinuingOperations
96 Loss per share for the year from discontinued operations (in pesos per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShareFromDiscontinuedOperations
97 Total profit (loss) per share for the year (in pesos per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
98 Weighted average number of shares for the year (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
99 030000 - Statement - Consolidated statements of comprehensive income Network

*

*

 http://tmm.com.mx/role/ConsolidatedStatementsOfComprehensiveIncome
100 Implied Table Table

*

*

 implied:Table
101 Consolidated statements of comprehensive income [Abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
102 Net profit (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
103 Other comprehensive income: Abstract ifrs-full:OtherComprehensiveIncomeAbstract
104 Items that will not be subsequently reclassified to profit or loss Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract
105 Decrease of non-controlling interest Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome
106 Actuarial gains, net Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
107 Revaluation surplus (Note 28) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRevaluation
108 Income tax on other comprehensive income Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss
109 Total of other comprehensive income for the year Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
110 Comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
111 Attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
112 Non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
113 Controlling interest Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
114 040000 - Statement - Consolidated statements of changes in stockholders' equity Network

*

*

 http://tmm.com.mx/role/ConsolidatedStatementsOfChangesInStockholdersEquity
115 Statement of changes in equity [table] Table

*

*

 ifrs-full:StatementOfChangesInEquityTable
116 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
117 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
118 Number of Outstanding Common Shares [Member] Member ifrs-full:OrdinarySharesMember
119 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
120 Equity [member] Member ifrs-full:EquityMember
121 Share Capital [Member] Member ifrs-full:IssuedCapitalMember
122 Treasury Shares [Member] Member ifrs-full:TreasurySharesMember
123 Mandatory Convertible Debentures Into Shares [Member] Member gtmay:MandatoryConvertibleDebenturesIssuedSharesMember
124 Accumulated Losses [Member] Member ifrs-full:RetainedEarningsMember
125 Other Components of Equity [Member] Member ifrs-full:OtherEquityInterestMember
126 Subtotal [Member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
127 Non Controlling Interest [Member] Member ifrs-full:NoncontrollingInterestsMember
128 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
129 Balance, beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
130 Balance, beginning of period (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
131 Net income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
132 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
133 Comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
134 Equity portion of mandatorily convertible debentures into shares (Note 18) Concept (Monetary) For Period Credit ifrs-full:IssueOfConvertibleInstruments
135 Cancellation of mandatorily convertible debentures into shares (Note 18) Concept (Monetary) For Period Debit ifrs-full:ReductionOfIssuedCapital
136 Balance, end of period Concept (Monetary) As Of Credit ifrs-full:Equity
137 Balance, end of period (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
138 050000 - Statement - Consolidated statements of cash flow Network

*

*

 http://tmm.com.mx/role/ConsolidatedStatementsOfCashFlow
139 Implied Table Table

*

*

 implied:Table
140 Consolidated statements of cash flow [Abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
141 Cash flows from operating activities: Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
142 Profit (loss) before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
143 Adjustments to reconcile the profit (loss) with cash used in operating activities: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
144 Depreciation, amortization and loss from revaluation Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
145 Other amortizations Concept (Monetary) For Period Debit gtmay:AdjustmentsForOtherAmortisationExpense
146 (Gain) loss from the sale of property, vessels and equipment, net Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
147 Accrued interests Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForInterestExpense
148 Gain from the loss of control of subsidiary Concept (Monetary) For Period Credit ifrs-full:GainsLossesRecognisedWhenControlInSubsidiaryIsLost
149 Exchange (gain) loss Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
150 Loss (gain) from the sale of subsidiaries Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
151 Changes in assets and liabilities: Abstract gtmay:ChangesInAssetsAndLiabilitiesAbstract
152 Accounts receivable Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
153 Other accounts receivable and related parties Concept (Monetary) For Period Debit gtmay:AdjustmentsForDecreaseIncreaseInOtherOperatingReceivablesAndRelatedParties
154 Materials and supplies Concept (Monetary) For Period Debit gtmay:AdjustmentsForDecreaseIncreaseInRawMaterialsAndProductionSupplies
155 Prepayments Concept (Monetary) For Period Debit gtmay:AdjustmentsForDecreaseIncreaseInPrepayments
156 Other accounts payable and accrued expenses Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherOperatingPayables
157 Other non-current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherAssets
158 Employee benefits Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
159 Total adjustments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForReconcileProfitLoss
160 Cash from operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
161 Cash from investment activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
162 Proceeds from sale of property, vessels and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
163 Acquisition of property, vessels and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
164 Proceeds from sale of subsidiaries Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod
165 Decrease of cash and cash equivalents from the loss of control of subsidiary (TMM DM) Concept (Monetary) For Period Credit ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
166 Cash (used in) from investment activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
167 Cash flow from financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
168 Debt contracted Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
169 Debt payments Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
170 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
171 Cash used in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
172 Exchange effect on cash Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
173 (Decrease) increase in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
174 Cash and cash equivalents, beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
175 Cash and cash equivalents, end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
176 Complementary information: Abstract gtmay:ComplementaryInformationAbstract
177 Income tax paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefund
178 060100 - Disclosure - General information Network

*

*

 http://tmm.com.mx/role/GeneralInformation
179 Implied Table Table

*

*

 implied:Table
180 General information [Abstract] Abstract gtmay:GeneralInformationAbstract
181 General information Concept (Text Block (HTML)) For Period gtmay:DisclosureOfGeneralInformationAboutTheEntityExplanatoryTextBlock
182 060200 - Disclosure - Changes in accounting policies Network

*

*

 http://tmm.com.mx/role/ChangesInAccountingPolicies
183 Implied Table Table

*

*

 implied:Table
184 Changes in accounting policies [Abstract] Abstract gtmay:ChangesInAccountingPoliciesAbstract
185 Changes in accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfChangesInAccountingPoliciesAccountingEstimatesAndErrorsExplanatory
186 060300 - Disclosure - Summary of significant accounting policies Network

*

*

 http://tmm.com.mx/role/SummaryOfSignificantAccountingPolicies
187 Implied Table Table

*

*

 implied:Table
188 Summary of significant accounting policies [Abstract] Abstract ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
189 Summary of significant accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
190 060400 - Disclosure - Going concern Network

*

*

 http://tmm.com.mx/role/GoingConcern
191 Implied Table Table

*

*

 implied:Table
192 Going concern [Abstract] Abstract gtmay:GoingConcernAbstract
193 Going concern Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGoingConcernExplanatory
194 060500 - Disclosure - Acquisitions and disposals Network

*

*

 http://tmm.com.mx/role/AcquisitionsAndDisposals
195 Implied Table Table

*

*

 implied:Table
196 Acquisitions and disposals [Abstract] Abstract gtmay:AcquisitionsAndDisposalsAbstract
197 Acquisitions and disposals Concept (Text Block (HTML)) For Period gtmay:DisclosureOfAcquisitionsAndDisposalsGroupTextBlock
198 060600 - Disclosure - Cash and cash equivalents Network

*

*

 http://tmm.com.mx/role/CashAndCashEquivalents
199 Implied Table Table

*

*

 implied:Table
200 Cash and cash equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
201 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
202 060700 - Disclosure - Trade receivables Network

*

*

 http://tmm.com.mx/role/TradeReceivables
203 Implied Table Table

*

*

 implied:Table
204 Trade receivables [Abstract] Abstract gtmay:TradeReceivablesAbstract
205 Trade receivables Concept (Text Block (HTML)) For Period gtmay:DisclosureOfTradeReceivablesTextBlock
206 060800 - Disclosure - Other accounts receivable Network

*

*

 http://tmm.com.mx/role/OtherAccountsReceivable
207 Implied Table Table

*

*

 implied:Table
208 Other accounts receivable [Abstract] Abstract gtmay:OtherAccountsReceivableAbstract
209 Other accounts receivable Concept (Text Block (HTML)) For Period gtmay:DisclosureOfOtherReceivablesTextBlock
210 060900 - Disclosure - Materials and supplies Network

*

*

 http://tmm.com.mx/role/MaterialsAndSupplies
211 Implied Table Table

*

*

 implied:Table
212 Materials and supplies [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
213 Materials and supplies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
214 061000 - Disclosure - Prepayments Network

*

*

 http://tmm.com.mx/role/Prepayments
215 Implied Table Table

*

*

 implied:Table
216 Prepayments [Abstract] Abstract gtmay:PrepaymentsAbstract
217 Prepayments Concept (Text Block (HTML)) For Period gtmay:DisclosureOfPrepaymentsExplanatoryTextBlock
218 061100 - Disclosure - Leases Network

*

*

 http://tmm.com.mx/role/Leases
219 Implied Table Table

*

*

 implied:Table
220 Leases [Abstract] Abstract ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
221 Leases Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfLeasesExplanatory
222 061200 - Disclosure - Concession rights Network

*

*

 http://tmm.com.mx/role/ConcessionRights
223 Implied Table Table

*

*

 implied:Table
224 Concession rights [Abstract] Abstract ifrs-full:DisclosureOfServiceConcessionArrangementsAbstract
225 Concession rights Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfServiceConcessionArrangementsExplanatory
226 061300 - Disclosure - Property, vessels and equipment Network

*

*

 http://tmm.com.mx/role/PropertyVesselsAndEquipment
227 Implied Table Table

*

*

 implied:Table
228 Property, vessels and equipment [Abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
229 Property, vessels and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
230 061400 - Disclosure - Other non-current assets Network

*

*

 http://tmm.com.mx/role/OtherNoncurrentAssets
231 Implied Table Table

*

*

 implied:Table
232 Other non-current assets [Abstract] Abstract gtmay:OtherNonCurrentAssetsAbstract
233 Other non-current assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
234 061500 - Disclosure - Intangible assets Network

*

*

 http://tmm.com.mx/role/IntangibleAssets
235 Implied Table Table

*

*

 implied:Table
236 Intangible assets [Abstract] Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
237 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
238 061600 - Disclosure - Impairment of long-lived assets Network

*

*

 http://tmm.com.mx/role/ImpairmentOfLonglivedAssets
239 Implied Table Table

*

*

 implied:Table
240 Impairment of long-lived assets [Abstract] Abstract ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
241 Impairment of long-lived assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory
242 061700 - Disclosure - Financial assets and liabilities Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilities
243 Implied Table Table

*

*

 implied:Table
244 Financial assets and liabilities [Abstract] Abstract gtmay:FinancialAssetsAndLiabilitiesAbstract
245 Financial assets and liabilities Concept (Text Block (HTML)) For Period gtmay:DisclosureOfFinancialAssetsAndLiabilitiesExplanatoryTextBlock
246 061800 - Disclosure - Mandatorily convertible debentures into shares Network

*

*

 http://tmm.com.mx/role/MandatorilyConvertibleDebenturesIntoShares
247 Implied Table Table

*

*

 implied:Table
248 Mandatorily convertible debentures into shares [Abstract] Abstract gtmay:MandatorilyConvertibleDebenturesIntoSharesAbstract
249 Mandatorily convertible debentures into shares Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDebtSecuritiesExplanatory
250 061900 - Disclosure - Balances and transactions with related parties Network

*

*

 http://tmm.com.mx/role/BalancesAndTransactionsWithRelatedParties
251 Implied Table Table

*

*

 implied:Table
252 Balances and transactions with related parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
253 Balances and transactions with related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
254 062000 - Disclosure - Accounts payable and accrued expenses Network

*

*

 http://tmm.com.mx/role/AccountsPayableAndAccruedExpenses
255 Implied Table Table

*

*

 implied:Table
256 Accounts payable and accrued expenses [Abstract] Abstract gtmay:AccountsPayableAndAccruedExpensesAbstract
257 Accounts payable and accrued expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccruedExpensesAndOtherLiabilitiesExplanatory
258 062100 - Disclosure - Stockholders' equity Network

*

*

 http://tmm.com.mx/role/StockholdersEquity
259 Implied Table Table

*

*

 implied:Table
260 Stockholders' equity [Abstract] Abstract ifrs-full:ChangesInEquityAbstract
261 Stockholders' equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
262 062200 - Disclosure - Other income Network

*

*

 http://tmm.com.mx/role/OtherIncome
263 Implied Table Table

*

*

 implied:Table
264 Other income [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
265 Other income Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory
266 062300 - Disclosure - Interest expense and other financial costs Network

*

*

 http://tmm.com.mx/role/InterestExpenseAndOtherFinancialCosts
267 Implied Table Table

*

*

 implied:Table
268 Interest expense and other financial costs [Abstract] Abstract gtmay:InterestExpenseAndOtherFinancialCostsAbstract
269 Interest expense and other financial costs Concept (Text Block (HTML)) For Period gtmay:DisclosureOfInterestExpenseAndOtherFinanceCostsTextBlock
270 062400 - Disclosure - Income tax and tax loss carryforwards Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwards
271 Implied Table Table

*

*

 implied:Table
272 Income tax and tax loss carryforwards [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
273 Income tax and tax loss carryforwards Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
274 062500 - Disclosure - Segment reporting Network

*

*

 http://tmm.com.mx/role/SegmentReporting
275 Implied Table Table

*

*

 implied:Table
276 Segment reporting [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
277 Segment reporting Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
278 062600 - Disclosure - Employee benefits Network

*

*

 http://tmm.com.mx/role/EmployeeBenefits
279 Implied Table Table

*

*

 implied:Table
280 Employee benefits [Abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
281 Employee benefits Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
282 062700 - Disclosure - Profit (loss) per share Network

*

*

 http://tmm.com.mx/role/ProfitLossPerShare
283 Implied Table Table

*

*

 implied:Table
284 Profit (loss) per share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
285 Profit (loss) per share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
286 062800 - Disclosure - Fair value measurement Network

*

*

 http://tmm.com.mx/role/FairValueMeasurement
287 Implied Table Table

*

*

 implied:Table
288 Fair value measurement [Abstract] Abstract ifrs-full:DisclosureOfFairValueMeasurementOfAssetsAbstract
289 Fair value measurement Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueMeasurementExplanatory
290 062900 - Disclosure - Financial instruments risk Network

*

*

 http://tmm.com.mx/role/FinancialInstrumentsRisk
291 Implied Table Table

*

*

 implied:Table
292 Financial instruments risk [Abstract] Abstract ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
293 Financial instruments risk Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
294 063000 - Disclosure - Capital management policies and procedures Network

*

*

 http://tmm.com.mx/role/CapitalManagementPoliciesAndProcedures
295 Implied Table Table

*

*

 implied:Table
296 Capital management policies and procedures [Abstract] Abstract ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
297 Capital management policies and procedures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory
298 063100 - Disclosure - Commitments and contingencies Network

*

*

 http://tmm.com.mx/role/CommitmentsAndContingencies
299 Implied Table Table

*

*

 implied:Table
300 Commitments and contingencies [Abstract] Abstract gtmay:CommitmentsAndContingenciesAbstract
301 Commitments and contingencies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
302 063200 - Disclosure - Events subsequent to the reporting date Network

*

*

 http://tmm.com.mx/role/EventsSubsequentToReportingDate
303 Implied Table Table

*

*

 implied:Table
304 Events subsequent to the reporting date [Abstract] Abstract gtmay:EventsSubsequentToTheReportingDateAbstract
305 Events subsequent to the reporting date Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
306 063300 - Disclosure - Authorization of the consolidated financial statements Network

*

*

 http://tmm.com.mx/role/AuthorizationOfConsolidatedFinancialStatements
307 Implied Table Table

*

*

 implied:Table
308 Authorization of the consolidated financial statements [Abstract] Abstract gtmay:AuthorizationOfTheConsolidatedFinancialStatementsAbstract
309 Authorization of the consolidated financial statements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAuthorisationOfFinancialStatementsExplanatory
310 070300 - Disclosure - Summary of significant accounting policies (Policies) Network

*

*

 http://tmm.com.mx/role/SummaryOfSignificantAccountingPoliciesPolicies
311 Implied Table Table

*

*

 implied:Table
312 Summary of significant accounting policies [Abstract] Abstract ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
313 Basis of consolidation Concept (Text Block (HTML)) For Period gtmay:DescriptionOfAccountingPolicyForTheBasisOfConsolidationExplanatoryPolicyTextBlock
314 Business combinations Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
315 Foreign currency translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
316 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
317 Materials and supplies Concept (Text Block (HTML)) For Period gtmay:DescriptionOfAccountingPolicyForInventoryPolicyTextBlock
318 Prepayments Concept (Text Block (HTML)) For Period gtmay:DescriptionOfAccountingPolicyForPrepaymentsPolicyTextBlock
319 Property, vessels and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
320 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
321 Impairment testing of long-lived assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
322 Leased assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
323 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
324 Provisions, contingent liabilities and contingent assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory
325 Taxes on earnings Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
326 Statutory employee profit sharing Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
327 Post-employment benefits and benefits for short-term employees Concept (Text Block (HTML)) For Period gtmay:DescriptionOfAccountingPolicyForPostEmployeeBenefitsAndBenefitsForShortTermEmployeesPolicyTextBlock
328 Stockholders' equity Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIssuedCapitalExplanatory
329 Recognition of revenue, costs and expenses, and financing costs Concept (Text Block (HTML)) For Period gtmay:DescriptionOfAccountingPolicyForRecognitionOfRevenueCostsAndExpensesAndFinancingCostsPolicyTextBlock
330 Information by segments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
331 Discontinued operations Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDiscontinuedOperationsExplanatory
332 Significant management judgment in applying accounting policies and estimation uncertainty Concept (Text Block (HTML)) For Period gtmay:DescriptionOfAccountingPolicyForSignificantManagementJudgmentInApplyingAccountingPoliciesAndEstimationUncertaintyPolicyTextBlock
333 080100 - Disclosure - General information (Tables) Network

*

*

 http://tmm.com.mx/role/GeneralInformationTables
334 Implied Table Table

*

*

 implied:Table
335 General information [Abstract] Abstract gtmay:GeneralInformationAbstract
336 Percentage of equity interest in various subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
337 080500 - Disclosure - Acquisitions and disposals (Tables) Network

*

*

 http://tmm.com.mx/role/AcquisitionsAndDisposalsTables
338 Implied Table Table

*

*

 implied:Table
339 Acquisitions and disposals [Abstract] Abstract gtmay:AcquisitionsAndDisposalsAbstract
340 Carrying value of net assets and consideration received Concept (Text Block (HTML)) For Period gtmay:CarryingValueOfNetAssetsAndConsiderationReceivedDisposalGroupTableTextBlock
341 080600 - Disclosure - Cash and cash equivalents (Tables) Network

*

*

 http://tmm.com.mx/role/CashAndCashEquivalentsTables
342 Implied Table Table

*

*

 implied:Table
343 Cash and cash equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
344 Cash and cash equivalents Concept (Text Block (HTML)) For Period gtmay:CashAndCashEquivalentsTableTextBlock
345 080700 - Disclosure - Trade receivables (Tables) Network

*

*

 http://tmm.com.mx/role/TradeReceivablesTables
346 Implied Table Table

*

*

 implied:Table
347 Trade receivables [Abstract] Abstract gtmay:TradeReceivablesAbstract
348 Summary of trade receivables Concept (Text Block (HTML)) For Period gtmay:DisclosureOfTheSummaryOfTradeReceivablesTableTextBlock
349 080800 - Disclosure - Other accounts receivable (Tables) Network

*

*

 http://tmm.com.mx/role/OtherAccountsReceivableTables
350 Implied Table Table

*

*

 implied:Table
351 Other accounts receivable [Abstract] Abstract gtmay:OtherAccountsReceivableAbstract
352 Schedule of other accounts receivable Concept (Text Block (HTML)) For Period gtmay:ScheduleOfOtherReceivablesTableTextBlock
353 080900 - Disclosure - Materials and supplies (Tables) Network

*

*

 http://tmm.com.mx/role/MaterialsAndSuppliesTables
354 Implied Table Table

*

*

 implied:Table
355 Materials and supplies [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
356 Summary of materials and supplies Concept (Text Block (HTML)) For Period gtmay:DisclosureOfTheSummaryOfMaterialsAndSuppliesTableTextBlock
357 081000 - Disclosure - Prepayments (Tables) Network

*

*

 http://tmm.com.mx/role/PrepaymentsTables
358 Implied Table Table

*

*

 implied:Table
359 Prepayments [Abstract] Abstract gtmay:PrepaymentsAbstract
360 Summary of prepayments Concept (Text Block (HTML)) For Period gtmay:DisclosureOfTheSummaryOfPrepaidExpensesTableTextBlock
361 081100 - Disclosure - Leases (Tables) Network

*

*

 http://tmm.com.mx/role/LeasesTables
362 Implied Table Table

*

*

 implied:Table
363 Leases [Abstract] Abstract ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
364 Minimum future financial lease payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
365 Summary of expiries of operating leases Concept (Text Block (HTML)) For Period gtmay:DisclosureOfMaturityAnalysisOfOperatingLeaseAssetsTableTextBlock
366 Minimum future operating lease payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
367 081200 - Disclosure - Concession rights (Tables) Network

*

*

 http://tmm.com.mx/role/ConcessionRightsTables
368 Implied Table Table

*

*

 implied:Table
369 Concession rights [Abstract] Abstract ifrs-full:DisclosureOfServiceConcessionArrangementsAbstract
370 Summary of concession rights Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutServiceConcessionArrangementsExplanatory
371 081300 - Disclosure - Property, vessels and equipment (Tables) Network

*

*

 http://tmm.com.mx/role/PropertyVesselsAndEquipmentTables
372 Implied Table Table

*

*

 implied:Table
373 Property, vessels and equipment [Abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
374 Summary of property, vessels and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
375 Cost model revalued carrying amounts Concept (Text Block (HTML)) For Period gtmay:DisclosureOfInformationAboutPropertyPlantAndEquipmentUnderCostMethodTableTextBlock
376 081400 - Disclosure - Other non-current assets (Tables) Network

*

*

 http://tmm.com.mx/role/OtherNoncurrentAssetsTables
377 Implied Table Table

*

*

 implied:Table
378 Other non-current assets [Abstract] Abstract gtmay:OtherNonCurrentAssetsAbstract
379 Schedule of other non-current assets Concept (Text Block (HTML)) For Period gtmay:ScheduleOfOtherNonCurrentAssetsTableTextBlock
380 081500 - Disclosure - Intangible assets (Tables) Network

*

*

 http://tmm.com.mx/role/IntangibleAssetsTables
381 Implied Table Table

*

*

 implied:Table
382 Intangible assets [Abstract] Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
383 Summary of intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
384 081600 - Disclosure - Impairment of long-lived assets (Tables) Network

*

*

 http://tmm.com.mx/role/ImpairmentOfLonglivedAssetsTables
385 Implied Table Table

*

*

 implied:Table
386 Impairment of long-lived assets [Abstract] Abstract ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
387 Present value of expected cash flows for each segment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
388 081700 - Disclosure - Financial assets and liabilities (Tables) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesTables
389 Implied Table Table

*

*

 implied:Table
390 Financial assets and liabilities [Abstract] Abstract gtmay:FinancialAssetsAndLiabilitiesAbstract
391 Financial assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
392 Financial liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
393 Summary of Trust Certificates Concept (Text Block (HTML)) For Period gtmay:DisclosureOfDetailedInformationAboutTrustCertificatesTextBlock
394 Summary of other financing Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
395 Maturity of long-term financial debt Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
396 081800 - Disclosure - Mandatorily convertible debentures into shares (Tables) Network

*

*

 http://tmm.com.mx/role/MandatorilyConvertibleDebenturesIntoSharesTables
397 Implied Table Table

*

*

 implied:Table
398 Mandatorily convertible debentures into shares [Abstract] Abstract gtmay:MandatorilyConvertibleDebenturesIntoSharesAbstract
399 Debenture conversion dates Concept (Text Block (HTML)) For Period gtmay:DisclosureOfMaturityAnalysisOfConversionOfConvertibleDebtIntoEquityTableTextBlock
400 Summary of components of convertible debentures Concept (Text Block (HTML)) For Period gtmay:DisclosureOfCompoundFinancialInstrumentsWithMultipleEmbeddedDerivativesTableTextBlock
401 081900 - Disclosure - Balances and transactions with related parties (Tables) Network

*

*

 http://tmm.com.mx/role/BalancesAndTransactionsWithRelatedPartiesTables
402 Implied Table Table

*

*

 implied:Table
403 Balances and transactions with related parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
404 Transactions with related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
405 Transactions involving executive personnel Concept (Text Block (HTML)) For Period gtmay:DisclosureOfShortTermBenefitsInvolvingRelatedParitiesTableTextBlock
406 082000 - Disclosure - Accounts payable and accrued expenses (Tables) Network

*

*

 http://tmm.com.mx/role/AccountsPayableAndAccruedExpensesTables
407 Implied Table Table

*

*

 implied:Table
408 Accounts payable and accrued expenses [Abstract] Abstract gtmay:AccountsPayableAndAccruedExpensesAbstract
409 Accounts payable and accrued expenses Concept (Text Block (HTML)) For Period gtmay:ScheduleOfAccountsPayableAndAccruedExpensesTableTextBlock
410 082100 - Disclosure - Stockholders' equity (Tables) Network

*

*

 http://tmm.com.mx/role/StockholdersEquityTables
411 Implied Table Table

*

*

 implied:Table
412 Stockholders' equity [Abstract] Abstract ifrs-full:ChangesInEquityAbstract
413 Current balance in Net Tax Profit Account (CUFIN) Concept (Text Block (HTML)) For Period gtmay:DisclosureOfDetailsOfBalancesForNetTaxProfitAccountCUFINTableTextBlock
414 Details of other components of equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
415 082200 - Disclosure - Other income (Tables) Network

*

*

 http://tmm.com.mx/role/OtherIncomeTables
416 Implied Table Table

*

*

 implied:Table
417 Other income [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
418 Other income (expense) Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExpenseExplanatory
419 082300 - Disclosure - Interest expense and other financial costs (Tables) Network

*

*

 http://tmm.com.mx/role/InterestExpenseAndOtherFinancialCostsTables
420 Implied Table Table

*

*

 implied:Table
421 Interest expense and other financial costs [Abstract] Abstract gtmay:InterestExpenseAndOtherFinancialCostsAbstract
422 Interest expense and other financial costs Concept (Text Block (HTML)) For Period gtmay:DisclosureOfDetailedInformationAboutInterestExpenseAndOtherFinancialCostsTableTextBlock
423 082400 - Disclosure - Income tax and tax loss carryforwards (Tables) Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwardsTables
424 Implied Table Table

*

*

 implied:Table
425 Income tax and tax loss carryforwards [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
426 Provision for income tax recognized in the statement of profit or loss Concept (Text Block (HTML)) For Period gtmay:DisclosureOfProvisionForIncomeTaxRecognizedThroughProfitOrLossTableTextBlock
427 Reconciliation of the provision for income tax Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
428 Components of deferred tax liability Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
429 Cumulative tax losses Concept (Text Block (HTML)) For Period gtmay:DisclosureOfCumulativeTaxLossCarryforwardsExpiryTableTextBlock
430 082500 - Disclosure - Segment reporting (Tables) Network

*

*

 http://tmm.com.mx/role/SegmentReportingTables
431 Implied Table Table

*

*

 implied:Table
432 Segment reporting [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
433 Information for operating segments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
434 082600 - Disclosure - Employee benefits (Tables) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsTables
435 Implied Table Table

*

*

 implied:Table
436 Employee benefits [Abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
437 Expenses recognized for employee benefits Concept (Text Block (HTML)) For Period gtmay:DisclosureOfExpensesRecognizedForEmployeeDefinedBenefitPlansTableTextBlock
438 Liabilities recognized for pensions and other remunerations Concept (Text Block (HTML)) For Period gtmay:DisclosureOfLiabilitiesRecognizedForEmployeeDefinedBenefitPlansTableTextBlock
439 Details of net cost for the period Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
440 Reserve for pensions and seniority premiums Concept (Text Block (HTML)) For Period gtmay:ProvisionForEmployeeBenefitsTableTextBlock
441 Defined Benefit Obligation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
442 Effects of changes to actuarial assumptions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
443 082800 - Disclosure - Fair value measurement (Tables) Network

*

*

 http://tmm.com.mx/role/FairValueMeasurementTables
444 Implied Table Table

*

*

 implied:Table
445 Fair value measurement [Abstract] Abstract ifrs-full:DisclosureOfFairValueMeasurementOfAssetsAbstract
446 Non-financial assets measured at fair value classified in Level 3 Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueMeasurementOfAssetsExplanatory
447 Information used for appraisal Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsExplanatory
448 Reconciliation between carrying amounts of non-financial assets classified within Level 3 Concept (Text Block (HTML)) For Period gtmay:ReconciliationBetweenCarryingAmountsOfNonFinancialAssetsClassifiedWithinLevel3TableTextBlock
449 082900 - Disclosure - Financial instruments risk (Tables) Network

*

*

 http://tmm.com.mx/role/FinancialInstrumentsRiskTables
450 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
451 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
452 Risks [member] Member ifrs-full:TypesOfRisksMember
453 Currency Risk [Member] Member ifrs-full:CurrencyRiskMember
454 Interest Rate Risks [Member] Member ifrs-full:InterestRateRiskMember
455 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
456 Sensitivity analysis Concept (Text Block (HTML)) For Period ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk
457 083000 - Disclosure - Capital management policies and procedures (Tables) Network

*

*

 http://tmm.com.mx/role/CapitalManagementPoliciesAndProceduresTables
458 Implied Table Table

*

*

 implied:Table
459 Capital management policies and procedures [Abstract] Abstract ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
460 Capital management summary Concept (Text Block (HTML)) For Period gtmay:DisclosureOfTheSummaryOfCapitalManagementTableTextBlock
461 090100 - Disclosure - General information, Corporate Events (Details) Network

*

*

 http://tmm.com.mx/role/GeneralInformationCorporateEventsDetails
462 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
463 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
464 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
465 TMM DM [Member] Member gtmay:TMMDivisionMartimaSADeCVMember
466 Class of Stock [Axis] Axis us-gaap:StatementClassOfStockAxis
467 Class of Stock [Domain] Member us-gaap:ClassOfStockDomain
468 Class II Series B Common Shares [Member] Member us-gaap:CommonClassBMember
469 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
470 Corporate events [Abstract] Abstract gtmay:CorporateEventsAbstract
471 Amount of variable capital increase Concept (Monetary) As Of Credit gtmay:SharesAuthorizedValue
472 Number of shares of variable capital increase (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
473 Variable capital increase, par value (in pesos per share) Concept (Share) As Of ifrs-full:ParValuePerShare
474 Percentage of shares transferred Concept (Percent) As Of gtmay:PercentageOfVotingEquityInterestsSold
475 090102 - Disclosure - General information, Structure of Grupo TMM (Details) Network

*

*

 http://tmm.com.mx/role/GeneralInformationStructureOfGrupoTmmDetails
476 Disclosure of subsidiaries [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
477 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
478 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
479 Transportacion Maritima Mexicana, S.A. de C.V. [Member] Member gtmay:TransportacionMaritimaMexicanaSADeCVMember
480 Inmobiliaria Dos Naciones, S. R.L. de C.V. [Member] Member gtmay:InmobiliariaDosNacionesSRLDeCVMember
481 TMM Parcel Tankers, S.A. de C.V. [Member] Member gtmay:TMMParcelTankersSADeCVMember
482 Almacenadora de Deposito Moderno, S.A. de C.V. [Member] Member gtmay:AlmacenadoraDeDepositoModernoSADeCVMember
483 Autotransportacion y Distribucion Logistica, S.A. de C.V. [Member] Member gtmay:AutotransportacionYDistribucionLogisticaSADeCVMember
484 TMM Logistics, S.A. de C.V. [Member] Member gtmay:TMMLogisticsSADeCVMember
485 Prestadora de Servicios MTR, S.A. de C.V. [Member] Member gtmay:PrestadoraDeServiciosMTRSADeCVMember
486 Servicios Administrativos API Acapulco, S.A. de C.V. [Member] Member gtmay:ServiciosAdministrativosAPIAcapulcoSADeCVMember
487 Administracion Portuaria Integral de Acapulco S.A. de C.V. [Member] Member gtmay:AdministracionPortuariaIntegralDeAcapulcoSADeCVMember
488 Mexschiff Operacion de Personal, S.A.P.I. de C.V. [Member] Member gtmay:MexschiffOperacionDePersonalSAPIDeCVMember
489 Omexmar Operadora Mexicana Maritima, S.A.P.I. de C.V. [Member] Member gtmay:OmexmarOperadoraMexicanaMaritimaSAPIDeCVMember
490 Perhafen Services Maritimos, S.A.P.I. de C.V. [Member] Member gtmay:PerhafenServicesMartimosSAPIDeCVMember
491 TMM Direccion Corporativa, S.A.P.I. de C.V. [Member] Member gtmay:TMMDireccionCorporativaSAPIDeCVMember
492 Perjomar Operadora, S.A.P.I. de C.V. [Member] Member gtmay:PerjomarOperadoraSAPIDeCVMember
493 Inmobiliaria TMM, S.A. de C.V. [Member] Member gtmay:InmobiliariaTMMSADeCVMember
494 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
495 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
496 Maritime [Member] Member gtmay:SpecializedMaritimeTransportationMember
497 Logistics [Member] Member gtmay:LogisticsSolutionServicesOperationsMember
498 Ports and Terminals [Member] Member gtmay:PortsAndTerminalsMember
499 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
500 Products and services [member] Member ifrs-full:ProductsAndServicesMember
501 Payroll Outsourcing [Member] Member gtmay:PayrollOutsourcingMember
502 Property Leasing [Member] Member gtmay:PropertyLeasingMember
503 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
504 Structure of Grupo TMM [abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
505 Percentage of ownership Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
506 090300 - Disclosure - Summary of significant accounting policies (Details) Network

*

*

 http://tmm.com.mx/role/SummaryOfSignificantAccountingPoliciesDetails
507 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
508 Range [axis] Axis ifrs-full:RangeAxis
509 Ranges [member] Member ifrs-full:RangesMember
510 Minimum [Member] Member ifrs-full:BottomOfRangeMember
511 Maximum [Member] Member ifrs-full:TopOfRangeMember
512 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
513 Post-employment benefits and benefits for short-term employees [Abstract] Abstract gtmay:PostEmploymentBenefitsAndBenefitsForShortTermEmployeesAbstract
514 Period of service required for seniority pension entitlement Concept (xbrli:durationItemType) For Period gtmay:DefinedBenefitsPlanSeniorityPensionServiceEligibilityPeriod
515 Retirement age of employee entitled to seniority pension Concept (xbrli:durationItemType) For Period gtmay:DefinedBenefitsPlanSeniorityPensionAgeOfIndividual
516 Defined benefits plan, pension plans for certain employees, age of individual Concept (xbrli:durationItemType) For Period gtmay:DefinedBenefitsPlanPensionPlansForCertainEmployeesAgeOfIndividual
517 Age of employee considered early retirement, additional pension plan Concept (xbrli:durationItemType) For Period gtmay:DefinedBenefitsPlanPensionPlansForCertainEmployeesEarlyRetirementAge
518 090300 - Disclosure - Summary of significant accounting policies (Details) Network

*

*

 http://tmm.com.mx/role/SummaryOfSignificantAccountingPoliciesDetails
519 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
520 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
521 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
522 Properties [Member] Member ifrs-full:LandAndBuildingsMember
523 Vessels [Member] Member ifrs-full:ShipsMember
524 Range [axis] Axis ifrs-full:RangeAxis
525 Ranges [member] Member ifrs-full:RangesMember
526 Minimum [Member] Member ifrs-full:BottomOfRangeMember
527 Maximum [Member] Member ifrs-full:TopOfRangeMember
528 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
529 Property, vessels and equipment [Abstract] Abstract gtmay:PropertyVesselsAndEquipmentDisclosuresAbstract
530 Valuation period of properties Concept (Text/String) For Period ifrs-full:MeasurementBasesPropertyPlantAndEquipment
531 Period of amortization of repair costs Concept (xbrli:durationItemType) For Period gtmay:PeriodOfAmortizationOfRepairCosts
532 090300 - Disclosure - Summary of significant accounting policies (Details) Network

*

*

 http://tmm.com.mx/role/SummaryOfSignificantAccountingPoliciesDetails
533 Implied Table Table

*

*

 implied:Table
534 Summary of significant accounting policies [Abstract] Abstract ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract
535 Recognition of revenue, costs and expenses, and financing costs [Abstract] Abstract gtmay:RecognitionOfRevenueCostsAndExpensesAndFinancingCostsAbstract
536 Minimum voyage duration of vessels for revenue to be recognized proportionally Concept (xbrli:durationItemType) For Period gtmay:RevenueRecognitionProportionallyRecognizedMinimumVesselVoyageDuration
537 Information by segments [Abstract] Abstract gtmay:DisclosureOfOperatingSegmentsAdditionalInformationAbstract
538 Number of operating segments Concept (Integer) For Period gtmay:OperatingSegmentsNumber
539 090400 - Disclosure - Going concern (Details) Network

*

*

 http://tmm.com.mx/role/GoingConcernDetails
540 Disclosure of detailed information about going concern [Table] Table

*

*

 gtmay:DisclosureOfDetailedInformationAboutGoingConcernTable
541 Range [axis] Axis ifrs-full:RangeAxis
542 Ranges [member] Member ifrs-full:RangesMember
543 Minimum [Member] Member ifrs-full:BottomOfRangeMember
544 Maximum [Member] Member ifrs-full:TopOfRangeMember
545 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
546 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
547 TMM DM [Member] Member gtmay:TMMDivisionMartimaSADeCVMember
548 Disclosure of detailed information about going concern [Line Items] LineItems gtmay:DisclosureOfDetailedInformationAboutGoingConcernLineItems
549 Going concern [Abstract] Abstract gtmay:GoingConcernDetailsAbstract
550 Percentage of shipping service reduced by main customer Concept (Percent) For Period gtmay:PercentageDecreaseOfShippingServices
551 Restructuring of Grupo TMM [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
552 Percentage of shares transferred Concept (Percent) As Of gtmay:PercentageOfVotingEquityInterestsSold
553 Consolidated debt reduction, amount Concept (Monetary) For Period Debit gtmay:AdjustmentToConsolidatedDebtLossOfControlOfSubsidiary
554 Gain from the loss of control of subsidiary Concept (Monetary) For Period Credit ifrs-full:GainsLossesRecognisedWhenControlInSubsidiaryIsLost
555 Stockholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
556 090500 - Disclosure - Acquisitions and disposals (Details) Network

*

*

 http://tmm.com.mx/role/AcquisitionsAndDisposalsDetails
557 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
558 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
559 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
560 TMM [Member] Member gtmay:InmobiliariaTMMSADeCVMember
561 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
562 Acquisition of subsidiaries [Abstract] Abstract gtmay:AcquisitionOfSubsidiariesAbstract
563 Percentage of voting equity interests acquired Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
564 Total consideration Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
565 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
566 Gain on business combination Concept (Monetary) For Period Credit ifrs-full:GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination
567 090500 - Disclosure - Acquisitions and disposals (Details) Network

*

*

 http://tmm.com.mx/role/AcquisitionsAndDisposalsDetails
568 Disclosure of Disposal Groups [Table] Table

*

*

 gtmay:DisclosureOfDisposalGroupsTable
569 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
570 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
571 TMM DM [Member] Member gtmay:TMMDivisionMartimaSADeCVMember
572 Other Subsidiaries [Member] Member gtmay:OtherSubsidiariesMember
573 Disclosure of Disposal Groups [Line Items] LineItems gtmay:DisclosureOfDisposalGroupsLineItems
574 Disposal of subsidiaries [Abstract] Abstract gtmay:DisposalOfSubsidiariesAbstract
575 Ownership percentage in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
576 Percentage of voting interest sold in subsidiaries Concept (Percent) As Of gtmay:PercentageOfVotingEquityInterestsSold
577 Carrying value of net assets and consideration received [Abstract] Abstract gtmay:CarryingValueOfNetAssetsAndConsiderationReceivedAbstract
578 Current assets [Abstract] Abstract gtmay:DisposalGroupAssetsCurrentAbstract
579 Cash and cash equivalents Concept (Monetary) As Of Debit gtmay:DisposalGroupCashAndCashEquivalents
580 Trade receivables Concept (Monetary) As Of Debit gtmay:DisposalGroupTradeReceivables
581 Other current assets Concept (Monetary) As Of Debit gtmay:DisposalGroupOtherAssetsCurrent
582 Total current assets Concept (Monetary) As Of Debit gtmay:DisposalGroupAssetsCurrent
583 Non-current [Abstract] Abstract gtmay:DisposalGroupAssetsNoncurrentAbstract
584 Vessels and equipment, net Concept (Monetary) As Of Debit gtmay:DisposalGroupPropertyPlantAndEquipmentNoncurrent
585 Other non-current assets Concept (Monetary) As Of Debit gtmay:DisposalGroupOtherAssetsNoncurrent
586 Total assets Concept (Monetary) As Of Debit gtmay:DisposalGroupAssets
587 Short-term liabilities [Abstract] Abstract gtmay:DisposalGroupLiabilitiesCurrentAbstract
588 Trust certificates Concept (Monetary) As Of Credit gtmay:DisposalGroupTrustCertificatesCurrent
589 Other short-term liabilities Concept (Monetary) As Of Credit gtmay:DisposalGroupOtherLiabilitiesCurrent
590 Total short-term liabilities Concept (Monetary) As Of Credit gtmay:DisposalGroupLiabilitiesCurrent
591 Long-term liabilities [Abstract] Abstract gtmay:DisposalGroupLiabilitiesNoncurrentAbstract
592 Trust certificates Concept (Monetary) As Of Credit gtmay:DisposalGroupTrustCertificatesNoncurrent
593 Other long-term liabilities Concept (Monetary) As Of Credit gtmay:DisposalGroupOtherLiabilitiesNoncurrent
594 Total liabilities Concept (Monetary) As Of Credit gtmay:DisposalGroupLiabilities
595 Total net assets Concept (Monetary) As Of Debit gtmay:DisposalGroupNetAssetsLiabilities
596 Consideration transferred Concept (Monetary) For Period Credit ifrs-full:ConsiderationPaidReceived
597 Investment retained by Grupo TMM Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
598 (Gain) loss on the disposition of subsidiaries Concept (Monetary) For Period Credit gtmay:GainLossOnSaleOfSubsidiariesAndLossOfControlOfSubsidiaries
599 090600 - Disclosure - Cash and cash equivalents (Details) Network

*

*

 http://tmm.com.mx/role/CashAndCashEquivalentsDetails
600 Implied Table Table

*

*

 implied:Table
601 Cash and cash equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
602 Cash on hand Concept (Monetary) As Of Debit ifrs-full:CashOnHand
603 Cash at banks Concept (Monetary) As Of Debit ifrs-full:BalancesWithBanks
604 Short-term investments Concept (Monetary) As Of Debit ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
605 Restricted cash Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
606 Total cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
607 Maximum period for fix-term deposits (promissory notes) and repurchase/resell agreement Concept (xbrli:durationItemType) For Period gtmay:MaximumPeriodForFixTermDepositsPromissoryNotesAndRepurchaseResellAgreements
608 090700 - Disclosure - Trade receivables (Details) Network

*

*

 http://tmm.com.mx/role/TradeReceivablesDetails
609 Disclosure of disaggregation of trade receivables [Table] Table

*

*

 gtmay:DisclosureOfDisaggregationOfTradeReceivablesTable
610 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
611 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
612 Maritime [Member] Member gtmay:SpecializedMaritimeTransportationMember
613 Ports and Terminals [Member] Member gtmay:PortsAndTerminalsMember
614 Logistics, Warehousing and Other Businesses [Member] Member gtmay:LogisticsSolutionServicesOperationsWarehousingOperationsAndOtherBusinessesMember
615 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
616 Products and services [member] Member ifrs-full:ProductsAndServicesMember
617 Parcel Tankers [Member] Member gtmay:ParcelTankersMember
618 Shipyards [Member] Member gtmay:ShipyardsMember
619 Offshore Vessels [Member] Member gtmay:OffshoreVesselsMember
620 Tugboats [Member] Member gtmay:TugboatsMember
621 Bulk Carrier [Member] Member gtmay:BulkCarrierMember
622 Tankers [Member] Member gtmay:TankersMember
623 Others [Member] Member gtmay:OthersMember
624 Shipping Agencies [Member] Member gtmay:ShippingAgenciesMember
625 Port Services [Member] Member gtmay:PortServicesMember
626 Commercial Leases [Member] Member gtmay:CommercialLeasesMember
627 Warehousing [Member] Member gtmay:WarehousingMember
628 Repair of Containers [Member] Member gtmay:RepairOfContainersMember
629 Automotive Services [Member] Member gtmay:AutomotiveServicesMember
630 Other Businesses [Member] Member gtmay:OtherBusinessesMember
631 Legal Entity [Axis] Axis dei:LegalEntityAxis
632 Entity [Domain] Member dei:EntityDomain
633 Greensill [Member] Member gtmay:GreensillCapitalLtdMember
634 Continuing involvement in derecognised financial assets by type of transfer [axis] Axis ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis
635 Types of transfer [member] Member ifrs-full:TypesOfTransferMember
636 Factored Receivables [Member] Member ifrs-full:FactoringOfReceivablesMember
637 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
638 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
639 LIBOR [Member] Member gtmay:FloatingInterestRateBaseLondonInterbankOfferedRateLIBORMember
640 Disclosure of disaggregation of trade receivables [Line Items] LineItems gtmay:DisclosureOfDisaggregationOfTradeReceivablesLineItems
641 Trade receivables [Abstract] Abstract gtmay:SummaryOfTradeReceivablesAbstract
642 Total trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
643 Allowance for doubtful accounts Concept (Monetary) As Of Credit gtmay:AllowanceAccountForTradeReceivables
644 Trade receivables, net Concept (Monetary) As Of Debit gtmay:TradeReceivablesNet
645 Factored amount Concept (Monetary) For Period Debit ifrs-full:ProceedsFromTransferActivity
646 Variable rate basis duration Concept (xbrli:durationItemType) For Period gtmay:VariableInterestRateBasisDuration
647 Variable rate basis Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
648 Percentage of discount on documents Concept (Percent) For Period gtmay:PercentageOfDiscountOnDocuments
649 090800 - Disclosure - Other accounts receivable (Details) Network

*

*

 http://tmm.com.mx/role/OtherAccountsReceivableDetails
650 Implied Table Table

*

*

 implied:Table
651 Other accounts receivable [Abstract] Abstract gtmay:OtherAccountsReceivableAbstract
652 Recoverable taxes Concept (Monetary) As Of Debit gtmay:OtherCurrentReceivablesRecoverableTaxes
653 Services for port, maritime and other operations Concept (Monetary) As Of Debit gtmay:OtherCurrentReceivablesServices
654 Insurance claims Concept (Monetary) As Of Debit gtmay:OtherCurrentReceivablesInsuranceClaims
655 Employees Concept (Monetary) As Of Debit gtmay:OtherCurrentReceivablesEmployee
656 Others Concept (Monetary) As Of Debit gtmay:OtherCurrentReceivablesOthers
657 Other accounts receivable Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
658 090900 - Disclosure - Materials and supplies (Details) Network

*

*

 http://tmm.com.mx/role/MaterialsAndSuppliesDetails
659 Implied Table Table

*

*

 implied:Table
660 Materials and supplies [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
661 Spare parts Concept (Monetary) As Of Debit ifrs-full:SpareParts
662 Fuels Concept (Monetary) As Of Debit ifrs-full:CurrentFuel
663 Others Concept (Monetary) As Of Debit ifrs-full:OtherInventories
664 Materials and supplies Concept (Monetary) As Of Debit ifrs-full:Inventories
665 091000 - Disclosure - Prepayments (Details) Network

*

*

 http://tmm.com.mx/role/PrepaymentsDetails
666 Implied Table Table

*

*

 implied:Table
667 Prepayments [Abstract] Abstract gtmay:PrepaymentsAbstract
668 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
669 Prepaid insurance premiums Concept (Monetary) As Of Debit gtmay:CurrentPrepaidInsurancePremiums
670 Fleet insurance Concept (Monetary) As Of Debit gtmay:CurrentPrepaidFleetInsurance
671 Prepayments Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
672 091100 - Disclosure - Leases, Financial leases as lessee (Details) Network

*

*

 http://tmm.com.mx/role/LeasesFinancialLeasesAsLesseeDetails
673 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
674 Maturity [axis] Axis ifrs-full:MaturityAxis
675 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
676 Within the 1st Year [Member] Member ifrs-full:NotLaterThanOneYearMember
677 1 to 3 Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
678 3 to 5 Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
679 After 5 Years [Member] Member ifrs-full:LaterThanFiveYearsMember
680 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
681 Minimum future financial lease payments [Abstract] Abstract gtmay:DisclosureOfFinanceLeaseByLesseeAbstract
682 Lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayable
683 Financial charges Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
684 Present values, net Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
685 091100 - Disclosure - Leases, Financial leases as lessee (Details) Network

*

*

 http://tmm.com.mx/role/LeasesFinancialLeasesAsLesseeDetails
686 Disclosure of recognised finance lease as assets by lessee [table] Table

*

*

 ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable
687 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
688 Assets [member] Member ifrs-full:ClassesOfAssetsMember
689 Vessel Subsea 88 [Member] Member gtmay:FTAISubsea88VesselMember
690 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
691 Carrying amount [member] Member ifrs-full:CarryingAmountMember
692 Carrying Amount [Member] Member ifrs-full:GrossCarryingAmountMember
693 Disclosure of recognised finance lease as assets by lessee [line items] LineItems ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems
694 Financial leases as lessee [Abstract] Abstract gtmay:FinancialLeasesAsLesseeAbstract
695 Value of finance lease assets Concept (Monetary) As Of Debit ifrs-full:RecognisedFinanceLeaseAsAssets
696 091102 - Disclosure - Leases, Operating leases as lessee (Details) Network

*

*

 http://tmm.com.mx/role/LeasesOperatingLeasesAsLesseeDetails
697 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
698 Maturity [axis] Axis ifrs-full:MaturityAxis
699 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
700 Within the 1st Year [Member] Member ifrs-full:NotLaterThanOneYearMember
701 1 to 3 Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
702 3 to 5 Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
703 After 5 Years [Member] Member ifrs-full:LaterThanFiveYearsMember
704 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
705 Minimum future operating lease payments [Abstract] Abstract gtmay:DisclosureOfOperatingLeaseByLesseeAbstract
706 Lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
707 091102 - Disclosure - Leases, Operating leases as lessee (Details) Network

*

*

 http://tmm.com.mx/role/LeasesOperatingLeasesAsLesseeDetails
708 Disclosure of recognized operating lease as assets by lessee [table] Table

*

*

 gtmay:DisclosureOfRecognizedOperatingLeaseAsAssetsByLesseeTable
709 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
710 Assets [member] Member ifrs-full:ClassesOfAssetsMember
711 Buildings [Member] Member ifrs-full:BuildingsMember
712 Cranes [Member] Member gtmay:CranesMember
713 Offshore Vessels [member] Member ifrs-full:ShipsMember
714 Docks and Equipment [Member] Member gtmay:DocksAndEquipmentMember
715 Lift Truck [Member] Member gtmay:LiftTruckMember
716 Disclosure of recognized operating lease as assets by lessee [line items] LineItems gtmay:DisclosureOfRecognizedOperatingLeaseAsAssetsByLesseeLineItems
717 Operating leases as lessee [Abstract] Abstract gtmay:OperatingLeasesAsLesseeAbstract
718 Leased assets expire Concept (Date) For Period gtmay:ExpiryDateOfOperatingLeases
719 091200 - Disclosure - Concession rights (Details) Network

*

*

 http://tmm.com.mx/role/ConcessionRightsDetails
720 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
721 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
722 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
723 Concession Rights [Member] Member ifrs-full:ServiceConcessionRightsMember
724 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
725 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
726 Administracion Portuaria Integral de Acapulco [Member] Member gtmay:AdministracionPortuariaIntegralDeAcapulcoSADeCVMember
727 Transportacion Maritima Mexicana [Member] Member gtmay:TransportacionMaritimaMexicanaSADeCVMember
728 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
729 Concession rights [Abstract] Abstract gtmay:ConcessionalRightsAbstract
730 Concessional rights, gross Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
731 Accumulated amortization Concept (Monetary) As Of Credit gtmay:AccumulatedAmortizationAndDepreciationConcessionRights
732 Concessional rights, net Concept (Monetary) As Of Debit gtmay:ConcessionalRightsNet
733 Years to amortize Concept (Text/String) For Period ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
734 Amortization expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
735 Concessional arrangement, rights renewal period Concept (xbrli:durationItemType) For Period gtmay:ConcessionalArrangementRightsRenewalPeriod
736 091300 - Disclosure - Property, vessels and equipment, summary (Details) Network

*

*

 http://tmm.com.mx/role/PropertyVesselsAndEquipmentSummaryDetails
737 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
738 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
739 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
740 Vessels [Member] Member ifrs-full:ShipsMember
741 Shipyard [Member] Member gtmay:ShipyardMember
742 Major Vessel Maintenance [Member] Member gtmay:MajorVesselMaintenanceMember
743 Buildings and Facilities [Member] Member ifrs-full:BuildingsMember
744 Warehousing Equipment [Member] Member gtmay:WarehousingEquipmentMember
745 Computer Equipment [Member] Member ifrs-full:ComputerEquipmentMember
746 Terminal Equipment [Member] Member gtmay:TerminalEquipmentMember
747 Ground Transportation Equipment [Member] Member gtmay:GroundTransportationEquipmentMember
748 Other Equipment [Member] Member ifrs-full:OtherPropertyPlantAndEquipmentMember
749 Total Property, Vessels and Equipment, Excluding Land and Construction in Progress [Member] Member gtmay:PropertyPlantAndEquipmentExcludingLandAndConstructionInProgressMember
750 Land [Member] Member ifrs-full:LandMember
751 Construction in Progress [Member] Member ifrs-full:ConstructionInProgressMember
752 Land, Buildings and Facilities [Member] Member ifrs-full:LandAndBuildingsMember
753 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
754 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
755 Optimus [Member] Member gtmay:ServicesSolutionsOptimusSDeRLDeCVMember
756 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
757 Carrying amount [member] Member ifrs-full:CarryingAmountMember
758 Accumulated Depreciation and Amortization [Member] Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
759 Range [axis] Axis ifrs-full:RangeAxis
760 Ranges [member] Member ifrs-full:RangesMember
761 Minimum [Member] Member ifrs-full:BottomOfRangeMember
762 Maximum [Member] Member ifrs-full:TopOfRangeMember
763 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
764 Reconciliation of changes in property, vessels and equipment [Abstract] Abstract ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
765 Net balances at year start Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
766 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
767 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
768 Transfers and others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesPropertyPlantAndEquipment
769 Depreciation/impairment Concept (Monetary) For Period Credit gtmay:DepreciationAndImpairmentPropertyPlantAndEquipment
770 Net balances at year end Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
771 Estimated useful lives (years) Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
772 Accumulated depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
773 Property, plant and equipment, revaluation surplus Concept (Monetary) As Of Credit gtmay:PropertyPlantAndEquipmentRevaluationSurplusNetOfReductionFromDeconsolidation
774 Revaluation surplus Concept (Monetary) As Of Credit ifrs-full:PropertyPlantAndEquipmentRevaluationSurplus
775 Loss from revaluation Concept (Monetary) For Period Debit ifrs-full:RevaluationIncreaseDecreasePropertyPlantAndEquipment
776 Number of vessels revaluated Concept (Integer) As Of gtmay:NumberOfAssetsRevaluatedPropertyVesselsAndEquipment
777 Gain on sale of real property Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
778 091302 - Disclosure - Property, vessels and equipment, Cost model (Details) Network

*

*

 http://tmm.com.mx/role/PropertyVesselsAndEquipmentCostModelDetails
779 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
780 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
781 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
782 Vessels [Member] Member ifrs-full:ShipsMember
783 Lands [Member] Member ifrs-full:LandMember
784 Properties [Member] Member ifrs-full:BuildingsMember
785 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
786 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
787 FTAI Subsea 88 [Member] Member gtmay:FTAISubsea88FinancialLeaseMember
788 Trust Certificates Program [Member] Member gtmay:TrustCertificatesProgramMember
789 Various Bank Loans [Member] Member gtmay:LoansWithBanksMember
790 Legal Entity [Axis] Axis dei:LegalEntityAxis
791 Entity [Domain] Member dei:EntityDomain
792 DVB Bank, NV [Member] Member gtmay:DVBBankNVMember
793 B. V. Scheepswerf Damen Gorinchem [Member] Member gtmay:BVScheepswerfDamenGorinchemMember
794 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
795 Property, vessels and equipment, cost model [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentRevaluationAbstract
796 Revalued carrying amounts Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentCarryingAmountAtCostOfRevaluedAssets
797 Revaluation surplus, before taxes Concept (Monetary) As Of Credit ifrs-full:PropertyPlantAndEquipmentRevaluationSurplus
798 Guarantees [Abstract] Abstract gtmay:GuaranteesPropertyVesselsAndEquipmentAbstract
799 Number of vessels pledged as security Concept (Integer) As Of gtmay:PropertyPlantAndEquipmentNumberPledgedAsSecurity
800 091400 - Disclosure - Other non-current assets (Details) Network

*

*

 http://tmm.com.mx/role/OtherNoncurrentAssetsDetails
801 Disclosure of detailed information about business combination [table] Table

*

*

 ifrs-full:DisclosureOfBusinessCombinationsTable
802 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
803 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
804 TMM Division Maritima, S.A. de C.V. [Member] Member gtmay:TMMDivisionMartimaSADeCVMember
805 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
806 Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
807 Proportion of ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
808 091400 - Disclosure - Other non-current assets (Details) Network

*

*

 http://tmm.com.mx/role/OtherNoncurrentAssetsDetails
809 Disclosure of joint ventures [table] Table

*

*

 ifrs-full:DisclosureOfJointVenturesTable
810 Legal Entity [Axis] Axis dei:LegalEntityAxis
811 Entity [Domain] Member dei:EntityDomain
812 Caoba [Member] Member gtmay:CaobaEnergiaSDeRLDeCVMember
813 Caoba and Grupo TMM [Member] Member gtmay:CaobaEnergiaSDeRLDeCVAndGrupoTMMMember
814 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
815 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
816 Optimus [Member] Member gtmay:ServicesSolutionsOptimusSDeRLDeCVMember
817 Disclosure of joint ventures [line items] LineItems ifrs-full:DisclosureOfJointVenturesLineItems
818 Joint Ventures [Abstract] Abstract ifrs-full:DisclosureOfJointVenturesAbstract
819 Capital contribution Concept (Monetary) For Period Credit ifrs-full:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
820 Percent ownership in joint venture Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
821 Contribution payment period Concept (xbrli:durationItemType) For Period gtmay:ContributionPaymentPeriod
822 091400 - Disclosure - Other non-current assets (Details) Network

*

*

 http://tmm.com.mx/role/OtherNoncurrentAssetsDetails
823 Disclosure of associates [table] Table

*

*

 ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
824 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
825 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
826 Almacenes de Jugos Citricos de Mexico, S.A.P.I. de C.V. [Member] Member gtmay:AlmacenesDeJugosCitricosDeMexicoSAPIDeCVMember
827 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
828 Associates [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesAbstract
829 Equity method investment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
830 Percentage of voting shares Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInAssociate
831 091500 - Disclosure - Intangible assets (Details) Network

*

*

 http://tmm.com.mx/role/IntangibleAssetsDetails
832 Disclosure of detailed information about intangible assets [table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
833 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
834 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
835 Software [Member] Member ifrs-full:ComputerSoftwareMember
836 Trademark [Member] Member ifrs-full:BrandNamesMember
837 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
838 Carrying amount [member] Member ifrs-full:CarryingAmountMember
839 Accumulated Amortization [Member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
840 Range [axis] Axis ifrs-full:RangeAxis
841 Ranges [member] Member ifrs-full:RangesMember
842 Minimum [Member] Member ifrs-full:BottomOfRangeMember
843 Maximum [Member] Member ifrs-full:TopOfRangeMember
844 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
845 Summary of intangible assets [Abstract] Abstract ifrs-full:ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract
846 Net balances at year start Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
847 Net balances at year start Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsWithIndefiniteUsefulLife
848 Additions (Disposals) Concept (Monetary) For Period Debit gtmay:AdditionsDisposals
849 Transfers and others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsOtherThanGoodwill
850 Amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
851 Net balances at year end Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
852 Net balances at year end Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsWithIndefiniteUsefulLife
853 Estimated useful life (years) Concept (Text/String) For Period ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
854 Accumulated amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
855 091600 - Disclosure - Impairment of long-lived assets (Details) Network

*

*

 http://tmm.com.mx/role/ImpairmentOfLonglivedAssetsDetails
856 Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [table] Table

*

*

 ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitTable
857 Individual assets or cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
858 Entity's total for individual assets or cash-generating units [member] Member ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
859 Assets or cash-generating units [Member] Member ifrs-full:IndividualAssetsOrCashgeneratingUnitsMember
860 Vessels and Trademark [Member] Member gtmay:VesselsAndTrademarkMember
861 Properties [Member] Member ifrs-full:BuildingsMember
862 Corporate Assets and Other Long-lived Assets [Member] Member gtmay:CorporateAssetsAndOtherLongLivedAssetsMember
863 Vessels [Member] Member ifrs-full:ShipsMember
864 Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] LineItems ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitLineItems
865 Impairment of long-lived assets [Abstract] Abstract ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitAbstract
866 Impairment loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
867 Projection period, calculation of recoverable amounts Concept (Text/String) For Period ifrs-full:ExplanationOfPeriodOverWhichManagementHasProjectedCashFlows
868 Recoverable amount for cash-generating units Concept (Monetary) As Of Debit ifrs-full:RecoverableAmountOfAssetOrCashgeneratingUnit
869 Growth rate Concept (Percent) As Of ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
870 Discount rate Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
871 Increase to discount rate used Concept (Percent) As Of gtmay:ChangeInDiscountRateAppliedToCashFlowProjections
872 Decrease in cash-generating unit value Concept (Percent) As Of gtmay:PercentageIncreaseDecreaseInCarryingAmountOfCashGeneratingUnit
873 091700 - Disclosure - Financial assets and liabilities, Categories of financial assets and liabilities (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesCategoriesOfFinancialAssetsAndLiabilitiesDetails
874 Disclosure of financial assets [table] Table

*

*

 ifrs-full:DisclosureOfFinancialAssetsTable
875 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
876 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
877 Financial Assets Valued at Amortized Cost [Member] Member ifrs-full:FinancialAssetsAtAmortisedCostMember
878 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
879 Financial assets [Abstract] Abstract ifrs-full:DisclosureOfFinancialAssetsAbstract
880 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
881 Trade receivables Concept (Monetary) As Of Debit gtmay:TradeReceivablesNet
882 Other accounts receivable Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
883 Related parties Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
884 Total current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
885 091700 - Disclosure - Financial assets and liabilities, Categories of financial assets and liabilities (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesCategoriesOfFinancialAssetsAndLiabilitiesDetails
886 Disclosure of financial liabilities [table] Table

*

*

 ifrs-full:DisclosureOfFinancialLiabilitiesTable
887 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
888 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
889 Financial Liabilities Valued at Amortized Cost [Member] Member ifrs-full:FinancialLiabilitiesAtAmortisedCostMember
890 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
891 Financial liabilities [Abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
892 Short-term portion of the financial debt Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
893 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
894 Accounts payable and accrued expenses Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
895 Related parties Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
896 Total short-term portion of the financial debt Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
897 Long-term financial debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
898 Total financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
899 091702 - Disclosure - Financial assets and liabilities, Financial debt, Trust Certificates (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesFinancialDebtTrustCertificatesDetails
900 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
901 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
902 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
903 Trust Certificates [Member] Member gtmay:TrustCertificatesMember
904 Range [axis] Axis ifrs-full:RangeAxis
905 Ranges [member] Member ifrs-full:RangesMember
906 Maximum [Member] Member ifrs-full:TopOfRangeMember
907 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
908 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
909 TMM DM [Member] Member gtmay:TMMDivisionMartimaSADeCVMember
910 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
911 Financial debt [Abstract] Abstract ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
912 Trust Certificates original amount Concept (Monetary) As Of Credit ifrs-full:BondsIssued
913 Trust certificates par value (in pesos per share) Concept (Share) As Of gtmay:TrustCertificatesParValue
914 Maturity date Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
915 Variable rate basis Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
916 Term of debt Concept (xbrli:durationItemType) For Period gtmay:TermOfDebtBond
917 Percentage of shares transferred Concept (Percent) As Of gtmay:PercentageOfVotingEquityInterestsSold
918 091704 - Disclosure - Financial assets and liabilities, Trust Certificates summarized (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesTrustCertificatesSummarizedDetails
919 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
920 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
921 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
922 Trust Certificates [Member] Member gtmay:TrustCertificatesMember
923 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
924 Summary of Trust Certificates [Abstract] Abstract gtmay:SummaryOfTrustCertificatesAbstract
925 Consolidated offering Concept (Monetary) As Of Credit ifrs-full:BondsIssued
926 Capitalization of interests Concept (Monetary) As Of Credit ifrs-full:NoncurrentInterestPayable
927 Payments made Concept (Monetary) As Of Debit gtmay:BondsIssuedBalanceOfPaymentsForPeriod
928 Transaction costs Concept (Monetary) As Of Debit gtmay:BorrowingCostsCapitalized
929 Subtotal Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentBondsIssued
930 Interest payable Concept (Monetary) As Of Credit ifrs-full:CurrentInterestPayable
931 Subscription of mandatorily convertible debentures into shares through CBFs Concept (Monetary) As Of Debit gtmay:DebenturesMandatorilyConvertibleSubscription
932 Loss of control of TMM DM Concept (Monetary) As Of Debit gtmay:LossOfControlOfSubsidiary
933 Long-term trust certificates Concept (Monetary) As Of Credit gtmay:BondsIssuedNonCurrent
934 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBonds
935 091706 - Disclosure - Financial assets and liabilities, Resolutions of CBFs Holders' Meeting (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesResolutionsOfCbfsHoldersMeetingDetails
936 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
937 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
938 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
939 Trust Certificates [Member] Member gtmay:TrustCertificatesMember
940 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
941 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
942 Variable Rate [Member] Member ifrs-full:FloatingInterestRateMember
943 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
944 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
945 Interest Rate CAP [Member] Member gtmay:InterestRateCAPContractMember
946 Range [axis] Axis ifrs-full:RangeAxis
947 Ranges [member] Member ifrs-full:RangesMember
948 Maximum [Member] Member ifrs-full:TopOfRangeMember
949 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
950 Resolutions of CBFs Holders' Meeting [Abstract] Abstract gtmay:ResolutionsOfHoldersMeetingAbstract
951 Interest payable Concept (Monetary) As Of Credit ifrs-full:InterestPayable
952 Payment of accrued interest Concept (Monetary) For Period Credit gtmay:PaymentOfAccruedInterest
953 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
954 Percentage of preferred payments on debt service and target capital Concept (Percent) As Of gtmay:PercentageOfPreferredPaymentsOnDebtServiceAndTargetCapital
955 Percentage of subordinated excess flow receivable Concept (Percent) As Of gtmay:PercentageOfSubordinatedExcessFlowReceivable
956 Percentage of convertible excess flow receivable Concept (Percent) As Of gtmay:PercentageOfConvertibleExcessFlowReceivable
957 Percentage of convertible preferred series Concept (Percent) As Of gtmay:PercentageOfConvertiblePreferredSeries
958 Percentage shares of convertible in to preferred series Concept (Percent) As Of gtmay:PercentageSharesOfConvertibleInToPreferredSeries
959 Term of extension to original date of maturity Concept (xbrli:durationItemType) For Period gtmay:TermOfExtensionToOriginalDateOfMaturity
960 Payment authorized from contingency fund Concept (Monetary) As Of Credit gtmay:PaymentOnTrustCertificates
961 Payment rate (in pesos per share) Concept (Share) As Of gtmay:RedemptionRateTrustCertificates
962 Basis points Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
963 Premium paid Concept (Monetary) For Period Credit gtmay:PremiumPaid
964 091708 - Disclosure - Financial assets and liabilities, Other Financing (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesOtherFinancingDetails
965 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
966 Currency [Axis] Axis us-gaap:CurrencyAxis
967 All Currencies [Domain] Member currency:AllCurrenciesDomain
968 Payable in Mexican Pesos [Member] Member currency:MXN
969 Payable in US Dollars [Member] Member currency:USD
970 Payable in Euros [Member] Member currency:EUR
971 Legal Entity [Axis] Axis dei:LegalEntityAxis
972 Entity [Domain] Member dei:EntityDomain
973 Daimler Financial Services Mexico, S. de R.L. de C.V. [Member] Member gtmay:DaimlerFinancialServicesMexicoSDeRLDeCVMember
974 Banco Autofin Mexico, S.A. Institucion de Banca Multiple [Member] Member gtmay:BancoAutofinMexicoSAInstitucionDeBancaMultipleMember
975 INPIASA, S.A. de C.V. [Member] Member gtmay:INPIASASADeCVMember
976 Banco del Bajio, S.A. - 1 [Member] Member gtmay:BancoDelBajioSA1Member
977 HSBC, S.A. [Member] Member gtmay:HSBCSAMember
978 Caja de Ahorro Popular la Merced Sociedad de Ahorro y Prestamo, S. de R.L. de C.V. [Member] Member gtmay:CajaDeAhorroPopularLaMercedSociedadDeAhorroYPrestamoSDeRLDeCVMember
979 Banco del Bajio, S.A. - 2 [Member] Member gtmay:BancoDelBajioSA2Member
980 CI Banco S.A. Institucion de Banca Multiple [Member] Member gtmay:CIBancoSAInstitucionDeBancaMultipleMember
981 DVB Bank America, NV [Member] Member gtmay:DVBBankAmericaNVMember
982 DEG-Deutsche Investitions - UND [Member] Member gtmay:DEGDeutscheInvestitionsUNDMember
983 Other [Member] Member gtmay:OtherFinancialInstitutionsMember
984 FTAI Subsea 88 Ltd [Member] Member gtmay:FTAISubsea88LtdMember
985 B V Scheepswerf Damen Gorinchem [Member] Member gtmay:BVScheepswerfDamenGorinchemMember
986 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
987 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
988 Debt Obligation [Member] Member gtmay:LoansAndObligationsToFinancialInstitutionsMember
989 Line of Credit - 1 [Member] Member gtmay:LineOfCredit1Member
990 Line of Credit - 2 [Member] Member gtmay:LineOfCredit2Member
991 Line of Credit - 3 [Member] Member gtmay:LineOfCredit3Member
992 Line of Credit - 4 [Member] Member gtmay:LineOfCredit4Member
993 Line of Credit - 5 [Member] Member gtmay:LineOfCredit5Member
994 Financial Lease [Member] Member gtmay:FinancialLeaseObligationsMember
995 Portfolio Securitization Program [Member] Member gtmay:PortfolioSecuritizationProgramMember
996 Restructured Line of Credit [Member] Member gtmay:RestructuredLineOfCreditMember
997 Unsecured Loan - 1 [Member] Member gtmay:DebtUnsecured1Member
998 Unsecured Loan - 2 [Member] Member gtmay:DebtUnsecured2Member
999 Unsecured Loans [Member] Member gtmay:DebtUnsecuredMember
1000 Trust Certificates [Member] Member gtmay:TrustCertificatesMember
1001 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1002 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1003 Variable Rate [Member] Member ifrs-full:FloatingInterestRateMember
1004 Fixed Rate [Member] Member ifrs-full:FixedInterestRateMember
1005 Average Rate [Member] Member gtmay:AverageInterestRateMember
1006 Maturity [axis] Axis ifrs-full:MaturityAxis
1007 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1008 First 4 Quarters [Member] Member ifrs-full:NotLaterThanOneYearMember
1009 Second 4 Quarters [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1010 Third 4 Quarters [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1011 Last 2 Quarters [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1012 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1013 Other Financing [Abstract] Abstract gtmay:OtherFinancingAbstract
1014 Short-term Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
1015 Long-term Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1016 Short-term interest payable Concept (Monetary) As Of Credit ifrs-full:CurrentInterestPayable
1017 Long-term interest payable Concept (Monetary) As Of Credit ifrs-full:NoncurrentInterestPayable
1018 Debt amount Concept (Monetary) As Of Credit ifrs-full:Borrowings
1019 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1020 Variable rate basis Concept (Text/String) For Period ifrs-full:BorrowingsInterestRateBasis
1021 Basis points Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
1022 Maturity date Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
1023 Grace period Concept (xbrli:durationItemType) For Period gtmay:LoanRepaymentGracePeriod
1024 Payment on debt Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
1025 091710 - Disclosure - Financial assets and liabilities, Covenants (Details) Network

*

*

 http://tmm.com.mx/role/FinancialAssetsAndLiabilitiesCovenantsDetails
1026 Disclosure of detailed information about borrowings [table] Table

*

*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1027 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1028 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1029 Trust Certificates and Bank Loans [Member] Member gtmay:TrustCertificatesAndBankLoansMember
1030 Maturity [axis] Axis ifrs-full:MaturityAxis
1031 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1032 2018 [Member] Member ifrs-full:NotLaterThanOneYearMember
1033 2019 [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1034 2020 [Member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1035 2021 [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1036 2022 [Member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1037 2023 and thereafter [Member] Member ifrs-full:LaterThanFiveYearsMember
1038 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1039 Covenants [Abstract] Abstract gtmay:CovenantsAbstract
1040 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1041 Long-term financial debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1042 091800 - Disclosure - Mandatorily convertible debentures into shares (Details) Network

*

*

 http://tmm.com.mx/role/MandatorilyConvertibleDebenturesIntoSharesDetails
1043 Disclosure of detailed information about financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1044 Range [axis] Axis ifrs-full:RangeAxis
1045 Ranges [member] Member ifrs-full:RangesMember
1046 Maximum [Member] Member ifrs-full:TopOfRangeMember
1047 Maturity [axis] Axis ifrs-full:MaturityAxis
1048 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1049 September 30, 2017 [Member] Member gtmay:DebtConversionConversionDate1Member
1050 September 30, 2019 [Member] Member gtmay:DebtConversionConversionDate2Member
1051 September 30, 2022 [Member] Member gtmay:DebtConversionConversionDate3Member
1052 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1053 Mandatorily convertible debentures into shares [Abstract] Abstract gtmay:DetailsOfMandatorilyConvertibleDebenturesIntoSharesAbstract
1054 Mandatorily convertible debentures into shares, authorized Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesAuthorizedValue
1055 First issue of mandatorily convertible debentures into shares Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesIssuedValue
1056 Mandatorily convertible debentures into shares, shares issued (in shares) Concept (Shares) As Of gtmay:MandatorilyConvertibleDebenturesIntoSharesSharesIssued
1057 Mandatorily convertible debentures into shares, par value (in pesos per share) Concept (Share) As Of gtmay:ConvertibleInstrumentParValue
1058 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1059 Conversion price (in pesos per share) Concept (Share) As Of gtmay:ConversionPrice
1060 Percentage on conversion date Concept (Percent) As Of gtmay:DebtConversionPercentageOfInstrumentsConverted
1061 091802 - Disclosure - Mandatorily convertible debentures into shares, Summary of components (Details) Network

*

*

 http://tmm.com.mx/role/MandatorilyConvertibleDebenturesIntoSharesSummaryOfComponentsDetails
1062 Implied Table Table

*

*

 implied:Table
1063 Mandatorily convertible debentures into shares [Abstract] Abstract gtmay:MandatorilyConvertibleDebenturesIntoSharesAbstract
1064 Total issue of debentures Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesIssuedValue
1065 Financial liability component Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesCurrentCarryingAmountOfFinancialLiabilityComponent
1066 Short-term interest payable Concept (Monetary) As Of Credit ifrs-full:CurrentInterestPayable
1067 Transaction costs Concept (Monetary) As Of Debit gtmay:FinancialLiabilityConvertibleInstrumentTransactionCostsIncurredCurrent
1068 Financial liability component of short-term debentures Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesCurrentPortionOfNonCurrentFinancialLiabilityComponent
1069 Financial liability component Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesNonCurrentCarryingAmountOfFinancialLiabilityComponent
1070 Long-term interest payable Concept (Monetary) As Of Credit ifrs-full:NoncurrentInterestPayable
1071 Transaction costs Concept (Monetary) As Of Debit gtmay:FinancialLiabilityConvertibleInstrumentTransactionCostsIncurredNonCurrent
1072 Financial liability component of long-term debentures Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesNonCurrentPortionOfNonCurrentFinancialLiabilityComponent
1073 Equity component Concept (Monetary) As Of Credit gtmay:MandatorilyConvertibleDebenturesCarryingAmountOfEquityComponent
1074 Interest payable Concept (Monetary) As Of Credit ifrs-full:InterestPayable
1075 Transaction costs Concept (Monetary) As Of Debit gtmay:EquityComponentConvertibleInstrumentTransactionCostsIncurred
1076 Equity component of debentures Concept (Monetary) As Of Credit gtmay:MandatoryConvertibleDebenturesIssuedShares
1077 091900 - Disclosure - Balances and transactions with related parties (Details) Network

*

*

 http://tmm.com.mx/role/BalancesAndTransactionsWithRelatedPartiesDetails
1078 Disclosure of transactions between related parties [table] Table

*

*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1079 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1080 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1081 Optimus [Member] Member gtmay:ServicesSolutionsOptimusSDeRLDeCVMember
1082 SSA Mexico, S.A. de C.V. [Member] Member gtmay:SSAMexicoSADeCVMember
1083 TMM DM [Member] Member gtmay:TMMDivisionMartimaSADeCVMember
1084 Executive Personnel [Member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1085 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1086 Balances and transactions with related parties [Abstract] Abstract ifrs-full:OutstandingBalancesForRelatedPartyTransactionsAbstract
1087 Receivable Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
1088 Payable Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
1089 Income: [Abstract] Abstract gtmay:RelatedPartyIncomeAbstract
1090 Gain on sale of fixed assets Concept (Monetary) For Period Credit gtmay:GainOnSaleFromSaleOfNonCurrentAssetsFromRelatedPartyTransactions
1091 Leases Concept (Monetary) For Period ifrs-full:LeasesAsLessorRelatedPartyTransactions
1092 Income Concept (Monetary) For Period Credit gtmay:RevenueRelatedPartyTransactions
1093 Expenses: [Abstract] Abstract gtmay:RelatedPartyExpensesAbstract
1094 Other expenses Concept (Monetary) For Period Debit gtmay:OtherExpensesRelatedPartyTransactions
1095 Short-term benefits [abstract] Abstract ifrs-full:ShorttermEmployeeBenefitsExpenseAbstract
1096 Salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
1097 Social security costs Concept (Monetary) For Period Debit ifrs-full:SocialSecurityContributions
1098 Short-term benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1099 092000 - Disclosure - Accounts payable and accrued expenses (Details) Network

*

*

 http://tmm.com.mx/role/AccountsPayableAndAccruedExpensesDetails
1100 Implied Table Table

*

*

 implied:Table
1101 Accounts payable and accrued expenses [Abstract] Abstract gtmay:AccountsPayableAndAccruedExpensesAbstract
1102 General expenses Concept (Monetary) As Of Credit gtmay:GeneralAccruedExpenses
1103 Purchased services Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
1104 Operating expenses Concept (Monetary) As Of Credit gtmay:CurrentAccruedOperatingExpenses
1105 Salaries and wages Concept (Monetary) As Of Credit ifrs-full:ShorttermEmployeeBenefitsAccruals
1106 Taxes payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilities
1107 Other Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
1108 Accounts payable and accrued expenses Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
1109 092100 - Disclosure - Stockholders' equity (Details) Network

*

*

 http://tmm.com.mx/role/StockholdersEquityDetails
1110 Disclosure of classes of share capital [table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
1111 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1112 Equity [member] Member ifrs-full:EquityMember
1113 CUFIN generated up to December 31, 2013 [Member] Member gtmay:December312013NetAfterTaxProfitAccountBalanceMember
1114 CUFIN generated beginning 2014 [Member] Member gtmay:January12014NetAfterTaxProfitAccountBalanceMember
1115 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1116 Capital stock [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
1117 Shares outstanding (in shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1118 Net tax profit account (CUFIN) [Abstract] Abstract gtmay:NetTaxProfitAccountAbstract
1119 Net tax profit account balance Concept (Monetary) As Of Credit gtmay:NetAfterTaxProfitAccount
1120 Income tax rate on CUFIN dividends Concept (Percent) For Period gtmay:NetTaxProfitAccountDividendDistributionIncomeTaxRate
1121 Period of credit against income tax on CUFIN dividends not drawn Concept (xbrli:durationItemType) For Period gtmay:NetTaxProfitAccountDividendDistributionTaxCreditPeriod
1122 Capital decreases [Abstract] Abstract ifrs-full:ChangesInNumberOfSharesOutstandingAbstract
1123 Capital Contribution Account balance Concept (Monetary) As Of Credit gtmay:PaidInCapital
1124 092102 - Disclosure - Stockholders' equity, Other Components of equity (Details) Network

*

*

 http://tmm.com.mx/role/StockholdersEquityOtherComponentsOfEquityDetails
1125 Disclosure of reserves within equity [table] Table

*

*

 ifrs-full:DisclosureOfReservesWithinEquityTable
1126 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1127 Equity [member] Member ifrs-full:EquityMember
1128 Other Components of Equity [Member] Member ifrs-full:OtherEquityInterestMember
1129 Reserves within equity [axis] Axis ifrs-full:ReservesWithinEquityAxis
1130 Other reserves [member] Member ifrs-full:OtherReservesMember
1131 Statutory Reserve [Member] Member ifrs-full:StatutoryReserveMember
1132 Defined Benefit Plan [Member] Member ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember
1133 Premium on Convertible Obligations [Member] Member ifrs-full:ReserveOfEquityComponentOfConvertibleInstrumentsMember
1134 Translation Result [Member] Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
1135 Revaluation Surplus [Member] Member ifrs-full:RevaluationSurplusMember
1136 Disclosure of reserves within equity [line items] LineItems ifrs-full:DisclosureOfReservesWithinEquityLineItems
1137 Other components of equity [Abstract] Abstract ifrs-full:DisclosureOfReservesWithinEquityAbstract
1138 Balance, beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
1139 Revaluation of vessels Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRevaluation
1140 Defined benefit plan Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1141 Reclassification from disposal of properties and depreciation Concept (Monetary) For Period Debit gtmay:ReclassificationAdjustmentsOnDisposalPropertiesAndDepreciationMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax
1142 Total before taxes Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTax
1143 Tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss
1144 Total net of taxes Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
1145 Balance, end of period Concept (Monetary) As Of Credit ifrs-full:Equity
1146 092200 - Disclosure - Other income (Details) Network

*

*

 http://tmm.com.mx/role/OtherIncomeDetails
1147 Implied Table Table

*

*

 implied:Table
1148 Other income [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
1149 Gain from loss of control of subsidiary TMMDM (see Note 5) Concept (Monetary) For Period Credit gtmay:IncomeFromTheSaleOfSubsidiaries
1150 Loss from the sale of subsidiaries Concept (Monetary) For Period Debit gtmay:LossFromSaleOfSubsidiaries
1151 Recoveries of taxes paid in prior years, net of expenses for recovery Concept (Monetary) For Period Credit gtmay:RecoveriesOfTaxesPaidInPriorYearsNetOfExpensesForRecovery
1152 Cancellation of liabilities Concept (Monetary) For Period Credit gtmay:GainOnCancellationOfLiabilities
1153 Cancellation of projects Concept (Monetary) For Period Debit gtmay:LossOnInvestmentsInOperatingProjects
1154 Income from sale of fixed assets Concept (Monetary) For Period Credit gtmay:IncomeSaleOfNonCurrentAssets
1155 Other - Net Concept (Monetary) For Period Credit gtmay:OtherIncomeNet
1156 Other income (expenses) Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
1157 092300 - Disclosure - Interest expense and other financial costs (Details) Network

*

*

 http://tmm.com.mx/role/InterestExpenseAndOtherFinancialCostsDetails
1158 Implied Table Table

*

*

 implied:Table
1159 Interest expense and other financial costs [Abstract] Abstract gtmay:InterestExpenseAndOtherFinancialCostsAbstract
1160 Interest on trust certificates Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnDebtInstrumentsIssued
1161 Interest on other loans Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBorrowings
1162 Transaction cost of mandatorily convertible debentures into shares Concept (Monetary) For Period Debit gtmay:TransactionCostOfMandatorilyConvertibleDebenturesIntoShares
1163 Amortization of trust certificate transaction cost Concept (Monetary) For Period Debit gtmay:AmortizationExpenseTrustCertificateTransactionCost
1164 Amortization of transaction cost associated with other loans Concept (Monetary) For Period Debit gtmay:AmortizationExpenseOtherBorrowings
1165 Other financial expenses Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
1166 Valuation of interest rate hedge (CAP) Concept (Monetary) For Period Debit gtmay:FinanceCostValuationOfInterestRateCAP
1167 Interest expense and other financial costs Concept (Monetary) For Period Debit gtmay:InterestExpenseAndOtherFinanceCosts
1168 092400 - Disclosure - Income tax and tax loss carryforwards, Results for the year (Details) Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwardsResultsForYearDetails
1169 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1170 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1171 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1172 Grupo TMM and Subsidiaries [Member] Member gtmay:ParentAndSubsidiariesMember
1173 Subsidiaries [Member] Member ifrs-full:SubsidiariesMember
1174 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1175 Results for the year [Abstract] Abstract gtmay:IncomeTaxResultsForTheYearAbstract
1176 Combined tax losses Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1177 Income on taxes recognized Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1178 Enacted Income Tax Law rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
1179 092400 - Disclosure - Income tax and tax loss carryforwards, Results for the year (Details) Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwardsResultsForYearDetails
1180 Implied Table Table

*

*

 implied:Table
1181 Income tax and tax loss carryforwards [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1182 Provision for income tax recognized in statement of profit or loss [Abstract] Abstract gtmay:ProvisionForIncomeTaxThroughProfitAndLossAbstract
1183 Income tax Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
1184 Deferred income tax Concept (Monetary) For Period ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1185 Total income tax (benefit) expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1186 092402 - Disclosure - Income tax and tax loss carryforwards, Reconciliation for income tax based on statutory rate (Details) Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwardsReconciliationForIncomeTaxBasedOnStatutoryRateDetails
1187 Implied Table Table

*

*

 implied:Table
1188 Income tax and tax loss carryforwards [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1189 Reconciliation between provision for income tax based on statutory income tax rate and provision recorded [Abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
1190 Profit (loss) before taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1191 Income tax Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
1192 (Decrease) increase from: [Abstract] Abstract gtmay:IncreaseDecreaseTemporaryDifferencesIncomeTaxReconciliationAbstract
1193 Difference in depreciation and amortization Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughDifferencesInDepreciationAndAmortizationInDeferredTaxLiabilityAsset
1194 Revaluation surplus Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughDifferencesInRevaluationSurplusInDeferredTaxLiabilityAsset
1195 Income recognized in advance Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughDifferencesInDeferredRevenueInDeferredTaxLiabilityAsset
1196 Materials and supplies Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughDifferencesInMaterialsAndSuppliesInDeferredTaxLiabilityAsset
1197 Inflationary and currency exchange effects on monetary assets and liabilities, net Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughInflationaryAndNetExchangeDifferencesDeferredTaxLiabilityAsset
1198 Tax losses - net Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfTaxLosses
1199 Provisions and allowance for doubtful accounts Concept (Monetary) For Period Debit gtmay:TaxEffectOfProvisionsAndAllowancesForDoubtfulAccountsExemptFromTaxation
1200 Difference between the tax and book value for the sale of assets Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughDifferencesInSaleOfAssetsInDeferredTaxLiabilityAsset
1201 Difference between the tax and book value for the sale of shares Concept (Monetary) For Period Credit gtmay:IncreaseDecreaseThroughDifferencesInTheSaleOfEquityInDeferredTaxLiabilityAsset
1202 Non-deductible expenses Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
1203 Total income tax (benefit) expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1204 092404 - Disclosure - Income tax and tax loss carryforwards, Components of deferred tax liability (Details) Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwardsComponentsOfDeferredTaxLiabilityDetails
1205 Implied Table Table

*

*

 implied:Table
1206 Income tax and tax loss carryforwards [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1207 Components of deferred tax liability [Abstract] Abstract gtmay:ComponentsOfDeferredTaxLiabilityAbstract
1208 Portion of tax loss carryforwards for subsequent years Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1209 Portion of tax loss carryforwards for subsequent years Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1210 Inventories and provisions - net Concept (Monetary) As Of Debit gtmay:DeferredTaxAssetsInventoryAndProvisionsNet
1211 Concession rights and property, vessels and equipment Concept (Monetary) As Of Credit gtmay:DeferredTaxLiabilitiesPropertyPlantAndEquipmentConcessionalRights
1212 Total deferred tax liability Concept (Monetary) As Of Credit ifrs-full:NetDeferredTaxLiabilities
1213 092406 - Disclosure - Income tax and tax loss carryforwards, Tax loss carryforwards (Details) Network

*

*

 http://tmm.com.mx/role/IncomeTaxAndTaxLossCarryforwardsTaxLossCarryforwardsDetails
1214 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1215 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1216 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1217 2008 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2008Member
1218 2009 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2009Member
1219 2010 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2010Member
1220 2011 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2011Member
1221 2012 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2012Member
1222 2013 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2013Member
1223 2014 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2014Member
1224 2015 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2015Member
1225 2016 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2016Member
1226 2017 - Year Loss Incurred [Member] Member gtmay:TaxLossCarryforwardsYearOfIncurredLoss2017Member
1227 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1228 Tax loss carryforwards [Abstract] Abstract gtmay:TaxLossCarryforwardsAbstract
1229 Tax loss carryforward amount Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1230 Year of expiration Concept (Text/String) For Period ifrs-full:DescriptionOfExpiryDateOfTemporaryDifferencesUnusedTaxLossesAndUnusedTaxCredits
1231 092500 - Disclosure - Segment reporting (Details) Network

*

*

 http://tmm.com.mx/role/SegmentReportingDetails
1232 Disclosure of operating segments [table] Table

*

*

 ifrs-full:DisclosureOfOperatingSegmentsTable
1233 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1234 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1235 Operating Segments [Member] Member ifrs-full:OperatingSegmentsMember
1236 Specialized Maritime Division [Member] Member gtmay:SpecializedMaritimeTransportationMember
1237 Logistics Division [Member] Member gtmay:LogisticsSolutionServicesOperationsMember
1238 Ports and Terminal Division [Member] Member gtmay:PortsAndTerminalsMember
1239 Warehousing Division [Member] Member gtmay:WarehousingMember
1240 Other Businesses and Shared Accounts [Member] Member gtmay:OtherBusinessesAndSharedAccountsMember
1241 Unallocated Amounts [Member] Member ifrs-full:UnallocatedAmountsMember
1242 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
1243 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
1244 Discontinued Operations [Member] Member ifrs-full:DiscontinuedOperationsMember
1245 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
1246 Segment reporting [Abstract] Abstract gtmay:DetailsOfOperatingSegmentsAbstract
1247 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1248 Costs and expenses Concept (Monetary) For Period Debit gtmay:CostsAndExpensesByNature
1249 Corporate expenses Concept (Monetary) For Period Debit gtmay:CorporateExpenses
1250 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
1251 Transportation (loss) profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
1252 Loss before discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
1253 Discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
1254 Net profit (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1255 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
1256 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1257 Total capital expenditures Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
1258 092600 - Disclosure - Employee benefits, Expenses and liabilities recognized for pensions and other employee remunerations (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsExpensesAndLiabilitiesRecognizedForPensionsAndOtherEmployeeRemunerationsDetails
1259 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1260 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1261 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1262 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1263 Pensions and Seniority Premiums [Member] Member gtmay:PensionsAndSeniorityPremiumsMember
1264 Termination of Employment [Member] Member gtmay:TerminationOfEmploymentMember
1265 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1266 Expenses recognized [Abstract] Abstract gtmay:PensionsAndEmployeeBenefitsExpensesRecognizedAbstract
1267 Salaries, benefits and inherent Concept (Monetary) For Period Debit ifrs-full:ShorttermEmployeeBenefitsExpense
1268 Pensions - defined benefit plans Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1269 Employee benefits expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
1270 Long-term [Abstract] Abstract gtmay:PensionsAndOtherEmployeeRemunerationsLongTermAbstract
1271 Employee benefits Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
1272 Short term liabilities and remunerations [Abstract] Abstract gtmay:PensionsShortTermLiabilitiesAndRemunerationsAbstract
1273 Short-term employee benefits accruals Concept (Monetary) As Of Credit ifrs-full:ShorttermEmployeeBenefitsAccruals
1274 Actuarial (loss) gain net of taxes Concept (Monetary) For Period Debit gtmay:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAssetNetOfIncomeTax
1275 092602 - Disclosure - Employee benefits, Net cost for period (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsNetCostForPeriodDetails
1276 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1277 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1278 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1279 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1280 Pensions and Seniority Premiums [Member] Member gtmay:PensionsAndSeniorityPremiumsMember
1281 Termination of Employment [Member] Member gtmay:TerminationOfEmploymentMember
1282 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1283 Details for net cost [Abstract] Abstract ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract
1284 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1285 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1286 Net cost for the period Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInNetDefinedBenefitLiabilityAsset
1287 092604 - Disclosure - Employee benefits, Reserve (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsReserveDetails
1288 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1289 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1290 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1291 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1292 Pensions and Seniority Premiums [Member] Member gtmay:PensionsAndSeniorityPremiumsMember
1293 Termination of Employment [Member] Member gtmay:TerminationOfEmploymentMember
1294 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1295 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1296 Defined Benefit Obligations [Member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1297 Plan Assets [Member] Member ifrs-full:PlanAssetsMember
1298 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1299 Reserve for pension, seniority premiums and termination of employment [Abstract] Abstract gtmay:ReserveForPensionSeniorityPremiumsAndTerminationOfEmploymentAbstract
1300 Total reserve Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisionsForEmployeeBenefits
1301 092606 - Disclosure - Employee benefits, Defined benefit obligation (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsDefinedBenefitObligationDetails
1302 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1303 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1304 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1305 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1306 Pensions and Seniority Premiums [Member] Member gtmay:PensionsAndSeniorityPremiumsMember
1307 Termination of Employment [Member] Member gtmay:TerminationOfEmploymentMember
1308 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1309 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1310 DBO [Member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1311 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1312 Disclosure of net defined benefit liability (asset) [abstract] Abstract ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetAbstract
1313 Balance at period start Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1314 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1315 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1316 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1317 Benefits paid from plan assets Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1318 Miscellaneous Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
1319 Actuarial losses and gains Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1320 Balance at period end Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1321 092608 - Disclosure - Employee benefits, Plan assets (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsPlanAssetsDetails
1322 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1323 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1324 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1325 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1326 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1327 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1328 Plan Assets [Member] Member ifrs-full:PlanAssetsMember
1329 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1330 Plan assets [Abstract] Abstract gtmay:DefinedBenefitsPlanAssetsAbstract
1331 Balance at period start Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1332 Expected return on assets Concept (Monetary) For Period Debit ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
1333 Plan contributions Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
1334 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1335 Interests of plan assets Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1336 Balance at period end Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1337 092610 - Disclosure - Employee benefits, Changes in pension plan, seniority premium and termination of employment plan (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsChangesInPensionPlanSeniorityPremiumAndTerminationOfEmploymentPlanDetails
1338 Disclosure of net defined benefit liability (asset) [table] Table

*

*

 ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1339 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1340 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1341 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1342 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1343 Changes in pension plan [Abstract] Abstract ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract
1344 Balance at period start Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1345 Total cost for the year Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInNetDefinedBenefitLiabilityAsset
1346 Contributions to the plan Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
1347 Miscellaneous Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
1348 Benefits paid charged to the reserve Concept (Monetary) For Period Debit ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1349 Actuarial gain Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1350 Balance at period end Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1351 092612 - Disclosure - Employee benefits, Significant actuarial assumptions (Details) Network

*

*

 http://tmm.com.mx/role/EmployeeBenefitsSignificantActuarialAssumptionsDetails
1352 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

*

*

 ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
1353 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1354 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1355 Domestic Defined Benefit Plans [Member] Member ifrs-full:DomesticDefinedBenefitPlansMember
1356 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
1357 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
1358 Discount Rate [Member] Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1359 Salary Increase Rate [Member] Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember
1360 Inflation Rate [Member] Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflationMember
1361 Average Working Life Expectancy [Member] Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfPensionIncreasesMember
1362 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1363 Risks [member] Member ifrs-full:TypesOfRisksMember
1364 1.0% Increase [Member] Member gtmay:PercentageOfPossibleIncreaseInActuarialAssumptionMember
1365 1.0% Decrease [Member] Member gtmay:PercentageOfPossibleDecreaseInActuarialAssumptionMember
1366 One year Increase [Member] Member gtmay:PossibleIncreaseInExpectedPeriodOfMeasurementInActuarialAssumptionMember
1367 One year Decrease [Member] Member gtmay:PossibleDecreaseInExpectedPeriodOfMeasurementInActuarialAssumptionMember
1368 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
1369 Significant actuarial assumptions [Abstract] Abstract ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsAbstract
1370 Significant actuarial assumptions used for valuation Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
1371 Increase (decrease) in defined benefit obligation Concept (Monetary) As Of Credit gtmay:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseOrDecreaseInActuarialAssumption
1372 Percentage of employees working under collective bargaining agreements Concept (Percent) As Of gtmay:PercentageOfEmployeesUnderCollectiveBargainingAgreements
1373 Number of employees Concept (Decimal) As Of ifrs-full:NumberOfEmployees
1374 092700 - Disclosure - Profit (loss) per share (Details) Network

*

*

 http://tmm.com.mx/role/ProfitLossPerShareDetails
1375 Implied Table Table

*

*

 implied:Table
1376 Profit (loss) per share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
1377 Number of potentially dilutive instruments outstanding (in shares) Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
1378 092800 - Disclosure - Fair value measurement, Fair value measures for non-financial assets (Details) Network

*

*

 http://tmm.com.mx/role/FairValueMeasurementFairValueMeasuresForNonfinancialAssetsDetails
1379 Disclosure of fair value measurement of assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
1380 Measurement [axis] Axis ifrs-full:MeasurementAxis
1381 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1382 Recurring [Member] Member ifrs-full:RecurringFairValueMeasurementMember
1383 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1384 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1385 Vessels [Member] Member ifrs-full:ShipsMember
1386 Buildings and Facilities [Member] Member ifrs-full:BuildingsMember
1387 Land [Member] Member ifrs-full:LandMember
1388 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1389 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1390 Level 3 [Member] Member ifrs-full:Level3OfFairValueHierarchyMember
1391 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
1392 Fair value measurement [Abstract] Abstract ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsAbstract
1393 Non-financial assets Concept (Monetary) As Of Debit ifrs-full:Assets
1394 092802 - Disclosure - Fair value measurement, Information used for appraisal (Details) Network

*

*

 http://tmm.com.mx/role/FairValueMeasurementInformationUsedForAppraisalDetails
1395 Disclosure of significant unobservable inputs used in fair value measurement of assets [table] Table

*

*

 ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable
1396 Measurement [axis] Axis ifrs-full:MeasurementAxis
1397 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1398 Recurring [Member] Member ifrs-full:RecurringFairValueMeasurementMember
1399 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1400 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1401 Tugboats [Member] Member gtmay:TugboatAssetsMember
1402 Offshore Vessels [Member] Member gtmay:OffshoreVesselAssetsMember
1403 Parcel Tankers [Member] Member gtmay:ParcelTankerAssetsMember
1404 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
1405 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
1406 Discounted Cash Flow [Member] Member ifrs-full:DiscountedCashFlowMember
1407 Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems
1408 Information used for appraisal [Abstract] Abstract ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsAbstract
1409 Daily rate or fee Concept (Monetary) For Period Credit gtmay:EstimatedDailyRatesSignificantUnobservableInputsAssets
1410 Average percentage of utilization Concept (Percent) For Period gtmay:AveragePercentageOfUtilizationSignificantUnobservableInputsAssets
1411 Discount rate Concept (Percent) For Period ifrs-full:InterestRateSignificantUnobservableInputsAssets
1412 092804 - Disclosure - Fair value measurement, Reconciliation of non-financial assets classified within Level 3 (Details) Network

*

*

 http://tmm.com.mx/role/FairValueMeasurementReconciliationOfNonfinancialAssetsClassifiedWithinLevel3Details
1413 Disclosure of fair value measurement of assets [table] Table

*

*

 ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
1414 Measurement [axis] Axis ifrs-full:MeasurementAxis
1415 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1416 Recurring [Member] Member ifrs-full:RecurringFairValueMeasurementMember
1417 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1418 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1419 Vessels [Member] Member ifrs-full:ShipsMember
1420 Buildings and Facilities [Member] Member ifrs-full:LandAndBuildingsMember
1421 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1422 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1423 Level 3 [Member] Member ifrs-full:Level3OfFairValueHierarchyMember
1424 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
1425 Reconciliation between the carrying amounts of non-financial assets [Abstract] Abstract ifrs-full:ReconciliationOfChangesInFairValueMeasurementAssetsAbstract
1426 Beginning balance Concept (Monetary) As Of Debit ifrs-full:Assets
1427 Amount recognized in other comprehensive income: [Abstract] Abstract gtmay:AmountRecognizedInOtherComprehensiveIncomeAbstract
1428 Revaluation surplus of vessels Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssets
1429 Amount recognized in statements of operations: [Abstract] Abstract gtmay:AmountRecognizedInStatementsOfOperationsAbstract
1430 Loss on revaluation of vessels Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
1431 Total gains (losses) recognized in other comprehensive income and in statements of operations Concept (Monetary) For Period Credit gtmay:TotalGainsLossesRecognizedInProfitOrLossAndOtherComprehensiveIncomeFairValueMeasurementAssets
1432 Additions and disposals, net Concept (Monetary) For Period Debit gtmay:IncreaseDecreaseFromAdditionsAndDisposalsFairValueMeasurementAssets
1433 Ending balance Concept (Monetary) As Of Debit ifrs-full:Assets
1434 Effects from unrealized gains from fair value measurements Concept (Monetary) For Period Credit ifrs-full:GainsLossesRecognisedInProfitOrLossAttributableToChangeInUnrealisedGainsOrLossesForAssetsHeldAtEndOfPeriodFairValueMeasurement
1435 092900 - Disclosure - Financial instruments risk, Currency risk (Details) Network

*

*

 http://tmm.com.mx/role/FinancialInstrumentsRiskCurrencyRiskDetails
1436 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1437 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1438 Risks [member] Member ifrs-full:TypesOfRisksMember
1439 Currency Risk [Member] Member ifrs-full:CurrencyRiskMember
1440 4.73% Increase in the Exchange Rate [Member] Member gtmay:CurrencyRiskIncreaseThroughForeignExchangeRates2Member
1441 4.73% Decrease in the Exchange Rate [Member] Member gtmay:CurrencyRiskDecreaseThroughForeignExchangeRates2Member
1442 19.70% Increase in the Exchange Rate [Member] Member gtmay:CurrencyRiskIncreaseThroughForeignExchangeRates1Member
1443 19.70% Decrease in the Exchange Rate [Member] Member gtmay:CurrencyRiskDecreaseThroughForeignExchangeRates1Member
1444 Currency [Axis] Axis us-gaap:CurrencyAxis
1445 All Currencies [Domain] Member currency:AllCurrenciesDomain
1446 US [Member] Member currency:USD
1447 Other Currencies [Member] Member gtmay:CurrencyOtherMember
1448 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1449 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1450 Subsequent Event [Member] Member ifrs-full:AbnormallyLargeChangesInAssetPricesOrForeignExchangeRatesMember
1451 Range [axis] Axis ifrs-full:RangeAxis
1452 Ranges [member] Member ifrs-full:RangesMember
1453 Minimum [Member] Member ifrs-full:BottomOfRangeMember
1454 Maximum [Member] Member ifrs-full:TopOfRangeMember
1455 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1456 Currency risk [Abstract] Abstract gtmay:CurrencyRiskAbstract
1457 Percentage of sales denominated in US dollars Concept (Percent) For Period gtmay:PercentageOfEntitySRevenueDenominatedInAForeignCurrency
1458 Percentage of costs and expenses denominated in US dollars Concept (Percent) For Period gtmay:PercentageOfEntitySCostsAndExpensesDenominatedInForeignCurrency
1459 Assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1460 Liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1461 Total assets (liabilities) Concept (Monetary) As Of Debit gtmay:NetFinancialAssetsLiabilities
1462 Foreign exchange rate Concept (Decimal) As Of ifrs-full:ClosingForeignExchangeRate
1463 Assumed variance on foreign exchange rate Concept (Percent) For Period gtmay:AssumedVarianceInForeignExchangeRateFinancialAssetsAndLiabilities
1464 092902 - Disclosure - Financial instruments risk, Interest rate risks (Details) Network

*

*

 http://tmm.com.mx/role/FinancialInstrumentsRiskInterestRateRisksDetails
1465 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1466 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1467 Risks [member] Member ifrs-full:TypesOfRisksMember
1468 Interest Rate Risks [Member] Member ifrs-full:InterestRateRiskMember
1469 1% Variance [Member] Member gtmay:InterestRateRiskPercentChangeIncreaseMember
1470 - 1% Variance [Member] Member gtmay:InterestRateRiskPercentChangeDecreaseMember
1471 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1472 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1473 Fixed Rate [Member] Member ifrs-full:FixedInterestRateMember
1474 Variable Rate [Member] Member ifrs-full:FloatingInterestRateMember
1475 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1476 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1477 CAP Contract [Member] Member gtmay:InterestRateCAPContractMember
1478 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1479 Interest rate risks [Abstract] Abstract gtmay:InterestRateRisksAbstract
1480 Debt Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1481 Trust Certificates original amount Concept (Monetary) As Of Credit ifrs-full:BondsIssued
1482 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1483 Profit or loss for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1484 092904 - Disclosure - Financial instruments risk, Credit risk and Concentration of risk (Details) Network

*

*

 http://tmm.com.mx/role/FinancialInstrumentsRiskCreditRiskAndConcentrationOfRiskDetails
1485 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1486 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1487 Risks [member] Member ifrs-full:TypesOfRisksMember
1488 Credit Risk [Member] Member ifrs-full:CreditRiskMember
1489 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1490 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1491 Receivables [Member] Member ifrs-full:TradeReceivablesMember
1492 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
1493 Past due status [member] Member ifrs-full:PastDueStatusMember
1494 Up to 3 Months [Member] Member ifrs-full:LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember
1495 Up to 4 Months [Member] Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanFourMonthsMember
1496 More than 4 Months [Member] Member ifrs-full:LaterThanFourMonthsMember
1497 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1498 Customers [member] Member ifrs-full:MajorCustomersMember
1499 Pemex Exploracion y Produccion [Member] Member gtmay:PemexExploracionYProduccionMember
1500 P.M.I Trading Limited [Member] Member gtmay:PMITradingLimitedMember
1501 Fieldwood Energy E&P Mexico [Member] Member gtmay:FieldwoodEnergyEPMexicoMember
1502 Remaining Customers [Member] Member gtmay:CustomersOtherMember
1503 Range [axis] Axis ifrs-full:RangeAxis
1504 Ranges [member] Member ifrs-full:RangesMember
1505 Maximum [Member] Member ifrs-full:TopOfRangeMember
1506 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1507 Concentration of risk [Abstract] Abstract gtmay:ConcentrationRiskAbstract
1508 Percentage of revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
1509 Credit risk [Abstract] Abstract gtmay:CreditRiskAbstract
1510 Average payment period of significant client Concept (xbrli:durationItemType) For Period gtmay:SignificantCustomerPaymentPeriod
1511 Unimpaired accounts receivables in arrears Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1512 092906 - Disclosure - Financial instruments risk, Liquidity risk and Dissolution of Company risk (Details) Network

*

*

 http://tmm.com.mx/role/FinancialInstrumentsRiskLiquidityRiskAndDissolutionOfCompanyRiskDetails
1513 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

 ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
1514 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1515 Risks [member] Member ifrs-full:TypesOfRisksMember
1516 Liquidity Risk [Member] Member ifrs-full:LiquidityRiskMember
1517 Maturity [axis] Axis ifrs-full:MaturityAxis
1518 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1519 In 6 Months [Member] Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanSixMonthsMember
1520 6 to 12 Months [Member] Member ifrs-full:LaterThanSixMonthsAndNotLaterThanOneYearMember
1521 1 to 4 Years [Member] Member gtmay:LaterThanOneYearAndNotLaterThanFourYearsMember
1522 More than 4 Years [Member] Member gtmay:LaterThanFourYearsMember
1523 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
1524 Liquidity risk [Abstract] Abstract gtmay:LiquidityRiskAbstract
1525 Percentage of financial liabilities due in next 12 months Concept (Percent) As Of gtmay:PercentageOfFinancialLiabilitiesClassifiedCurrent
1526 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
1527 Accounts payable and accrued expenses Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
1528 Financial debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
1529 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1530 093000 - Disclosure - Capital management policies and procedures (Details) Network

*

*

 http://tmm.com.mx/role/CapitalManagementPoliciesAndProceduresDetails
1531 Implied Table Table

*

*

 implied:Table
1532 Capital management policies and procedures [Abstract] Abstract ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
1533 Stockholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
1534 Total financial debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
1535 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1536 General financing Concept (Monetary) As Of Credit gtmay:BorrowingsGeneralFinancing
1537 Ratio of total debt to stockholders' equity Concept (Pure) As Of gtmay:RatioOfIndebtednessToEquity
1538 093100 - Disclosure - Commitments and contingencies, Commitments (Details) Network

*

*

 http://tmm.com.mx/role/CommitmentsAndContingenciesCommitmentsDetails
1539 Implied Table Table

*

*

 implied:Table
1540 Commitments and contingencies [Abstract] Abstract gtmay:CommitmentsAndContingenciesAbstract
1541 Commitments [Abstract] Abstract gtmay:CommitmentsAbstract
1542 Concession fees Concept (Monetary) For Period Debit gtmay:ConcessionFeesExpense
1543 Capital contribution in joint venture Concept (Monetary) For Period Credit ifrs-full:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
1544 Capital contribution payment period for joint venture Concept (xbrli:durationItemType) For Period gtmay:ContributionPaymentPeriod
1545 093102 - Disclosure - Commitments and contingencies, Contingencies (Details) Network

*

*

 http://tmm.com.mx/role/CommitmentsAndContingenciesContingenciesDetails
1546 Disclosure of contingent liabilities [table] Table

*

*

 ifrs-full:DisclosureOfContingentLiabilitiesTable
1547 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
1548 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
1549 Legal proceedings Contingent Liability [member] Member ifrs-full:LegalProceedingsContingentLiabilityMember
1550 RPS Claim [Member] Member gtmay:LegalProceedingsContingentLiabilityRefinedProductServicesMember
1551 Mutual Loans Between WWS and TMM [Member] Member gtmay:LegalProceedingsContingentLiabilityWorldwideServicesLtdMember
1552 ADEMSA Secured Certificates of Deposit [Member] Member gtmay:LegalProceedingsContingentLiabilityADEMSAMember
1553 Claim of Grupo TMM Against SSA Mexico, S.A. de C.V. (SSA) [Member] Member gtmay:LegalProceedingsContingentLiabilityClaimOfGrupoTMMAgainstSSAMember
1554 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1555 Contingencies [Abstract] Abstract ifrs-full:DisclosureOfContingentLiabilitiesAbstract
1556 Contingent asset Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentAssets
1557 Contingent liability Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentLiabilities
1558 Settlement reserve Concept (Monetary) As Of Credit gtmay:LitigationLiabilityReserveAmount
1559 Settlement payment Concept (Monetary) For Period Debit gtmay:LitigationSettlementPaymentExpense

*

*