METHANEX CORP (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 0001000 - Document - Document and Entity Information Network

*

*

http://methanex.com/role/DocumentAndEntityInformation
2 Implied Table Table

*

*

implied:Table
3 Document And Entity Information [Abstract] Abstract mx: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 Document Type Concept (Submission Type) For Period dei:DocumentType
8 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
9 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
10 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
11 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
12 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
13 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
14 1001000 - Statement - Consolidated Statements of Financial Position Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfFinancialPosition
15 Implied Table Table

*

*

implied:Table
16 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
17 ASSETS Abstract ifrs-full:AssetsAbstract
18 Current assets: Abstract ifrs-full:CurrentAssetsAbstract
19 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
20 Trade and other receivables (note 3) Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
21 Inventories (note 4) Concept (Monetary) As Of Debit ifrs-full:Inventories
22 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
23 Other assets (note 7) Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
24 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
25 Non-current assets: Abstract ifrs-full:NoncurrentAssetsAbstract
26 Property, plant and equipment (note 5) Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
27 Investment in associate (note 6) Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
28 Deferred income tax assets (note 15) Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
29 Other assets (note 7) Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
30 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
31 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
32 LIABILITIES AND EQUITY Abstract ifrs-full:EquityAndLiabilitiesAbstract
33 Current liabilities: Abstract ifrs-full:CurrentLiabilitiesAbstract
34 Trade, other payables and accrued liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
35 Current maturities on long-term debt (note 8) Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
36 Current maturities on other long-term liabilities (note 9) Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
37 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
38 Non-current liabilities: Abstract ifrs-full:NoncurrentLiabilitiesAbstract
39 Long-term debt (note 8) Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
40 Other long-term liabilities (note 9) Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
41 Deferred income tax liabilities (note 15) Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
42 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
43 Equity: Abstract ifrs-full:EquityAbstract
44 Capital stock, 25,000,000 authorized preferred shares without nominal or par value; Unlimited authorization of common shares without nominal or par value; Issued and outstanding common shares at December 31, 2018 were 77,263,273 (2017 - 83,770,254) Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
45 Contributed surplus Concept (Monetary) As Of Credit ifrs-full:AdditionalPaidinCapital
46 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
47 Accumulated other comprehensive loss Concept (Monetary) As Of Credit ifrs-full:AccumulatedOtherComprehensiveIncome
48 Shareholders’ equity Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
49 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
50 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
51 Equity and liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
52 1001001 - Statement - Consolidated Statements of Financial Position (Parenthetical) Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfFinancialPositionParenthetical
53 Statement [Table] Table

*

*

mx:Statement1Table
54 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
55 Equity [member] Member ifrs-full:EquityMember
56 Capital stock Member ifrs-full:IssuedCapitalMember
57 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
58 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
59 Common shares Member ifrs-full:OrdinarySharesMember
60 Preferred shares Member ifrs-full:PreferenceSharesMember
61 Statement [Line Items] LineItems mx:Statement1LineItems
62 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
63 Number of shares outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
64 Number of shares authorised Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
65 1002000 - Statement - Consolidated Statements of Income Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfIncome
66 Implied Table Table

*

*

implied:Table
67 Profit or loss [abstract] Abstract ifrs-full:IncomeStatementAbstract
68 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
69 Cost of sales and operating expenses (note 10) Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
70 Depreciation and amortization (note 10) Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
71 Operating income Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
72 Earnings of associate (note 6) Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
73 Finance costs (note 11) Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
74 Finance income and other expenses Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
75 Income before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
76 Income tax expense (note 15): Abstract mx:IncomeTaxRecoveryExpenseAbstract
77 Current Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
78 Deferred Concept (Monetary) For Period Debit mx:DeferredTaxExpenseIncomeAndAdjustmentsForDeferredTaxOfPriorPeriods
79 Tax expense (income), continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
80 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
81 Attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
82 Methanex Corporation shareholders Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
83 Non-controlling interests (note 23) Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
84 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
85 Income per common share for the period attributable to Methanex Corporation shareholders: Abstract ifrs-full:BasicEarningsPerShareAbstract
86 Basic net income per common share (note 12) (in usd per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
87 Diluted net income per common share (note 12) (in usd per share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
88 Weighted average number of common shares outstanding (in shares) Concept (Shares) For Period ifrs-full:WeightedAverageShares
89 Diluted weighted average number of common shares outstanding (in shares) Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
90 1003000 - Statement - Consolidated Statements of Comprehensive Income Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfComprehensiveIncome
91 Implied Table Table

*

*

implied:Table
92 Statement of comprehensive income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
93 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
94 Other comprehensive income: Abstract ifrs-full:OtherComprehensiveIncomeAbstract
95 Items that may be reclassified to income: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
96 Change in fair value of cash flow hedges (note 18) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
97 Forward elements excluded from hedging relationship (note 18) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInValueOfForwardElementsOfForwardContractsBeforeTax
98 Items that will not be reclassified to income: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
99 Actuarial gains (losses) on defined benefit pension plans (note 20(a)) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
100 Taxes on above items Concept (Monetary) For Period ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
101 Other comprehensive loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
102 Comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
103 Attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
104 Methanex Corporation shareholders Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
105 Non-controlling interests (note 23) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
106 1004000 - Statement - Consolidated Statements of Changes in Equity Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfChangesInEquity
107 Statement of changes in equity [table] Table

*

*

ifrs-full:StatementOfChangesInEquityTable
108 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
109 Equity [member] Member ifrs-full:EquityMember
110 Capital stock Member ifrs-full:IssuedCapitalMember
111 Contributed surplus Member ifrs-full:AdditionalPaidinCapitalMember
112 Retained earnings Member ifrs-full:RetainedEarningsMember
113 Accumulated other comprehensive loss Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
114 Shareholders’ equity Member ifrs-full:EquityAttributableToOwnersOfParentMember
115 Non-controlling interests Member ifrs-full:NoncontrollingInterestsMember
116 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
117 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
118 Common shares Member ifrs-full:OrdinarySharesMember
119 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
120 Number of common shares, beginning of period Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
121 Balance, beginning of period Concept (Monetary) As Of Credit ifrs-full:Equity
122 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
123 Other comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
124 Compensation expense recorded for stock options Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
125 Issue of shares on exercise of stock options (in shares) Concept (Shares) For Period mx:IncreaseDecreaseThroughExerciseOfOptionsSharesEquity
126 Issue of shares on exercise of stock options Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
127 Reclassification of grant-date fair value on exercise of stock options Concept (Monetary) For Period Credit mx:IncreaseDecreaseThroughReclassificationOfGrantDateFairValueOnExerciseOfStockOptionsEquity
128 Payments for shares repurchased (in shares) Concept (Shares) For Period mx:StockRepurchasedDuringPeriodShares1
129 Payment for shares repurchased Concept (Monetary) For Period Debit mx:StockRepurchasedDuringPeriodValue1
130 Dividend payments to Methanex Corporation shareholders Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
131 Distributions made and accrued to non-controlling interests Concept (Monetary) For Period Debit ifrs-full:DividendsRecognisedAsDistributionsToNoncontrollingInterests
132 Equity contributions by non-controlling interests Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
133 Number of common shares, end of period Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
134 Balance, end of period Concept (Monetary) As Of Credit ifrs-full:Equity
135 1004001 - Statement - Consolidated Statements of Changes in Equity (Parenthetical) Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfChangesInEquityParenthetical
136 Implied Table Table

*

*

implied:Table
137 Statement of changes in equity [abstract] Abstract ifrs-full:StatementOfChangesInEquityAbstract
138 Dividends payments to Methanex Corporation shareholders (in usd per share) Concept (Share) For Period ifrs-full:DividendsRecognisedAsDistributionsToOwnersPerShare
139 1005000 - Statement - Consolidated Statements of Cash Flows Network

*

*

http://methanex.com/role/ConsolidatedStatementsOfCashFlows
140 Implied Table Table

*

*

implied:Table
141 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
142 CASH FLOWS FROM / (USED IN) OPERATING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
143 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
144 Deduct earnings of associate Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForUndistributedProfitsOfAssociates
145 Dividends received from associate Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedClassifiedAsOperatingActivities
146 Add (deduct) non-cash items: Abstract mx:AdjustmentsToReconcileProfitLossNonCashAbstractAbstract
147 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
148 Income tax expense Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncomeTaxExpense
149 Share-based compensation expense Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
150 Finance costs Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForFinanceCosts
151 Other Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
152 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
153 Other cash payments, including share-based compensation Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities
154 Cash flows from operating activities before undernoted Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
155 Changes in non-cash working capital (note 16(a)) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
156 Cash flows from / (used in) operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
157 CASH FLOWS FROM / (USED IN) FINANCING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
158 Payments for repurchase of shares Concept (Monetary) For Period Credit ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
159 Dividend payments to Methanex Corporation shareholders Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
160 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
161 Repayment of long-term debt and financing fees Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
162 Finance leases Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
163 Equity contributions by non-controlling interests Concept (Monetary) For Period Debit mx:ProceedsFromIssuanceOfOtherLongTermDebt1
164 Equity contributions by non-controlling interests Concept (Monetary) For Period Debit ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests
165 Cash distributions to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterests
166 Proceeds on issue of shares on exercise of stock options Concept (Monetary) For Period Debit ifrs-full:ProceedsFromExerciseOfOptions
167 Proceeds from limited recourse debt Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
168 Cash flows from / (used in) financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
169 CASH FLOWS FROM / (USED IN) INVESTING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
170 Property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
171 Restricted cash for vessels under construction Concept (Monetary) For Period Credit mx:PurchasesForConstructionInProgressClassifiedAsInvestingActivities
172 Other assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities
173 Changes in non-cash working capital related to investing activities (note 16(a)) Concept (Monetary) For Period Credit mx:IncreaseDecreaselnWorkingCapitalInvestingActivities
174 Cash flows from / (used in) investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
175 Increase (decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
176 Cash and cash equivalents, beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
177 Cash and cash equivalents, end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
178 2101100 - Disclosure - Nature of operations Network

*

*

http://methanex.com/role/NatureOfOperations
179 Implied Table Table

*

*

implied:Table
180 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract mx:CorporateInformationAndStatementOfIFRSComplianceAbstract
181 Nature of operations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNotesAndOtherExplanatoryInformationExplanatory
182 2104100 - Disclosure - Significant accounting policies Network

*

*

http://methanex.com/role/SignificantAccountingPolicies
183 Implied Table Table

*

*

implied:Table
184 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract mx:CorporateInformationAndStatementOfIFRSComplianceAbstract
185 Significant accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
186 2107100 - Disclosure - Trade and other receivables Network

*

*

http://methanex.com/role/TradeAndOtherReceivables
187 Implied Table Table

*

*

implied:Table
188 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
189 Trade and other receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
190 2110100 - Disclosure - Inventories Network

*

*

http://methanex.com/role/Inventories
191 Implied Table Table

*

*

implied:Table
192 Inventories [Abstract] Abstract mx:InventoriesAbstract
193 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
194 2113100 - Disclosure - Property, plant and equipment Network

*

*

http://methanex.com/role/PropertyPlantAndEquipment
195 Implied Table Table

*

*

implied:Table
196 Property, plant and equipment [abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
197 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
198 2116100 - Disclosure - Investment in associate Network

*

*

http://methanex.com/role/InvestmentInAssociate
199 Implied Table Table

*

*

implied:Table
200 Interests In Other Entities [Abstract] Abstract mx:InterestsInOtherEntitiesAbstract
201 Investment in associate Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesExplanatory
202 2119100 - Disclosure - Other assets Network

*

*

http://methanex.com/role/OtherAssets
203 Implied Table Table

*

*

implied:Table
204 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
205 Other assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
206 2122100 - Disclosure - Long-term debt Network

*

*

http://methanex.com/role/LongTermDebt
207 Implied Table Table

*

*

implied:Table
208 Financial Instruments [Abstract] Abstract mx:FinancialInstrumentsAbstract
209 Long-term debt Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBorrowingsExplanatory
210 2125100 - Disclosure - Other long-term liabilities Network

*

*

http://methanex.com/role/OtherLongTermLiabilities
211 Implied Table Table

*

*

implied:Table
212 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
213 Other long-term liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentLiabilitiesExplanatory
214 2128100 - Disclosure - Expenses Network

*

*

http://methanex.com/role/Expenses
215 Implied Table Table

*

*

implied:Table
216 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
217 Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesExplanatory
218 2131100 - Disclosure - Finance Costs Network

*

*

http://methanex.com/role/FinanceCosts
219 Implied Table Table

*

*

implied:Table
220 Borrowing costs [abstract] Abstract ifrs-full:BorrowingCostsAbstract
221 Finance cost Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceCostExplanatory
222 2134100 - Disclosure - Net income per common share Network

*

*

http://methanex.com/role/NetIncomePerCommonShare
223 Implied Table Table

*

*

implied:Table
224 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
225 Net income per common share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
226 2137100 - Disclosure - Share-based compensation Network

*

*

http://methanex.com/role/ShareBasedCompensation
227 Implied Table Table

*

*

implied:Table
228 Share-Based Payment Arrangements [Abstract] Abstract mx:ShareBasedPaymentArrangementsAbstract
229 Share-based compensation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
230 2140100 - Disclosure - Segmented information Network

*

*

http://methanex.com/role/SegmentedInformation
231 Implied Table Table

*

*

implied:Table
232 Operating Segments [Abstract] Abstract mx:OperatingSegmentsAbstract
233 Segmented information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
234 2143100 - Disclosure - Income and other taxes Network

*

*

http://methanex.com/role/IncomeAndOtherTaxes
235 Implied Table Table

*

*

implied:Table
236 Income Taxes [Abstract] Abstract mx:IncomeTaxesAbstract
237 Income and other taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
238 2146100 - Disclosure - Supplemental cash flow information Network

*

*

http://methanex.com/role/SupplementalCashFlowInformation
239 Implied Table Table

*

*

implied:Table
240 Cash Flow Statement [Abstract] Abstract mx:CashFlowStatementAbstract
241 Supplemental cash flow information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
242 2149100 - Disclosure - Capital disclosures Network

*

*

http://methanex.com/role/CapitalDisclosures
243 Implied Table Table

*

*

implied:Table
244 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract mx:CorporateInformationAndStatementOfIFRSComplianceAbstract
245 Capital disclosures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory
246 2152100 - Disclosure - Financial instruments Network

*

*

http://methanex.com/role/FinancialInstruments
247 Implied Table Table

*

*

implied:Table
248 Financial Instruments [Abstract] Abstract mx:FinancialInstrumentsAbstract
249 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
250 2155100 - Disclosure - Financial risk management Network

*

*

http://methanex.com/role/FinancialRiskManagement
251 Implied Table Table

*

*

implied:Table
252 Financial Instruments [Abstract] Abstract mx:FinancialInstrumentsAbstract
253 Financial risk management Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
254 2158100 - Disclosure - Retirement plans Network

*

*

http://methanex.com/role/RetirementPlans
255 Implied Table Table

*

*

implied:Table
256 Employee Benefits [Abstract] Abstract mx:EmployeeBenefitsAbstract
257 Retirement plans Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
258 2161100 - Disclosure - Commitments and contingencies Network

*

*

http://methanex.com/role/CommitmentsAndContingencies
259 Implied Table Table

*

*

implied:Table
260 Commitments And Contingencies [Abstract] Abstract mx:CommitmentsAndContingenciesAbstract
261 Commitments and contingencies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
262 2164100 - Disclosure - Related parties Network

*

*

http://methanex.com/role/RelatedParties
263 Implied Table Table

*

*

implied:Table
264 Related Party [Abstract] Abstract mx:RelatedPartyAbstract
265 Related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
266 2167100 - Disclosure - Non-controlling interests Network

*

*

http://methanex.com/role/NonControllingInterests
267 Implied Table Table

*

*

implied:Table
268 Interest In Other Entities [Abstract] Abstract mx:InterestInOtherEntitiesAbstract
269 Non-controlling interests Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncontrollingInterestsExplanatory
270 2204201 - Disclosure - Significant accounting policies (Policies) Network

*

*

http://methanex.com/role/SignificantAccountingPoliciesPolicies
271 Implied Table Table

*

*

implied:Table
272 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract mx:CorporateInformationAndStatementOfIFRSComplianceAbstract
273 Basis of presentation and consolidation Concept (Text Block (HTML)) For Period mx:ConsolidationPolicyPolicyTextBlock
274 Use of estimates Concept (Text Block (HTML)) For Period mx:UseofEstimatesPolicyPolicyTextBlock
275 Reporting currency Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory
276 Foreign currency translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
277 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
278 Receivables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
279 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
280 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
281 Other assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
282 Finance costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinanceCostsExplanatory
283 Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
284 Site restoration costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDecommissioningRestorationAndRehabilitationProvisionsExplanatory
285 Employee future benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
286 Share-based compensation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
287 Net income per common per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
288 Revenue recognition Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
289 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
290 Fair value measurements Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory
291 Income taxes Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
292 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
293 Segmented information Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
294 Application of new and revised accounting standards and Anticipated changes to International Financial Reporting Standards Concept (Text Block (HTML)) For Period mx:NewAccountingPronouncementsPolicy1PolicyTextBlock
295 2307301 - Disclosure - Trade and other receivables (Tables) Network

*

*

http://methanex.com/role/TradeAndOtherReceivablesTables
296 Implied Table Table

*

*

implied:Table
297 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
298 Schedule of trade and other receivables Concept (Text Block (HTML)) For Period mx:ScheduleOfTradeAndOtherReceivablesTableTextBlock
299 2313301 - Disclosure - Property, plant and equipment (Tables) Network

*

*

http://methanex.com/role/PropertyPlantAndEquipmentTables
300 Implied Table Table

*

*

implied:Table
301 Property, plant and equipment [abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
302 Schedule of property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
303 2316301 - Disclosure - Investment in associate (Tables) Network

*

*

http://methanex.com/role/InvestmentInAssociateTables
304 Implied Table Table

*

*

implied:Table
305 Interests In Other Entities [Abstract] Abstract mx:InterestsInOtherEntitiesAbstract
306 Summarized financial information in associate Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInAssociatesExplanatory
307 2319301 - Disclosure - Other assets (Tables) Network

*

*

http://methanex.com/role/OtherAssetsTables
308 Implied Table Table

*

*

implied:Table
309 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
310 Schedule of other assets Concept (Text Block (HTML)) For Period mx:ScheduleOfOtherAssets1TableTextBlock
311 2322301 - Disclosure - Long-term debt (Tables) Network

*

*

http://methanex.com/role/LongTermDebtTables
312 Implied Table Table

*

*

implied:Table
313 Financial Instruments [Abstract] Abstract mx:FinancialInstrumentsAbstract
314 Schedule of long-term debt Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
315 Schedule of minimum principal payments for long-term debt Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
316 2325301 - Disclosure - Other long-term liabilities (Tables) Network

*

*

http://methanex.com/role/OtherLongTermLiabilitiesTables
317 Implied Table Table

*

*

implied:Table
318 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
319 Composition of other liabilities Concept (Text Block (HTML)) For Period mx:DisclosureOfCompositionOfOtherLiabilitiesExplanatoryTableTextBlock
320 Provision for site restoration costs Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherProvisionsExplanatory
321 Finance lease obligations payable Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
322 2328301 - Disclosure - Expenses (Tables) Network

*

*

http://methanex.com/role/ExpensesTables
323 Implied Table Table

*

*

implied:Table
324 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
325 Schedule of expenses Concept (Text Block (HTML)) For Period mx:DisclosureofExpensesbyFunctionAndExpensesByNatureTableTextBlock
326 2334301 - Disclosure - Net income per common share (Tables) Network

*

*

http://methanex.com/role/NetIncomePerCommonShareTables
327 Implied Table Table

*

*

implied:Table
328 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
329 Earnings per share reconciliation Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
330 2337301 - Disclosure - Share-based compensation (Tables) Network

*

*

http://methanex.com/role/ShareBasedCompensationTables
331 Implied Table Table

*

*

implied:Table
332 Share-Based Payment Arrangements [Abstract] Abstract mx:ShareBasedPaymentArrangementsAbstract
333 Changes in number and exercise prices of other equity instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory
334 Number and weighted average remaining contractual life of SARs and TSARs outstanding and exercisable Concept (Text Block (HTML)) For Period mx:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingOtherEquityInstrumentsTableTextBlock
335 SARs and TSARs outstanding and exercisable by range of exercise prices Concept (Text Block (HTML)) For Period mx:DisclosureOfRangeOfExercisePricesOfOutstandingOtherEquityInstrumentsTableTextBlock
336 Weighted average assumptions of outstanding SARs and TSARs Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedOtherEquityInstrumentsGrantedDuringPeriodExplanatory
337 Changes in stock options issued Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
338 Stock options outstanding and exercisable by range of exercise prices Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory
339 Number and weighted average remaining contractual life of stock options outstanding and exercisable Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory
340 2340301 - Disclosure - Segmented information (Tables) Network

*

*

http://methanex.com/role/SegmentedInformationTables
341 Implied Table Table

*

*

implied:Table
342 Operating Segments [Abstract] Abstract mx:OperatingSegmentsAbstract
343 Revenue attributed to geographic regions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
344 2343301 - Disclosure - Income and other taxes (Tables) Network

*

*

http://methanex.com/role/IncomeAndOtherTaxesTables
345 Implied Table Table

*

*

implied:Table
346 Income Taxes [Abstract] Abstract mx:IncomeTaxesAbstract
347 Components of income tax expense Concept (Text Block (HTML)) For Period mx:DisclosureOfMajorComponentsOfTaxExpenseIncomeTableTextBlock
348 Reconciliation of accounting profit multiplied by applicable tax rates Concept (Text Block (HTML)) For Period mx:DisclosureOfReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesTableTextBlock
349 Effect of temporary difference, unused tax losses and unused tax credits and analysis of change in deferred income tax liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
350 2346301 - Disclosure - Supplemental cash flow information (Tables) Network

*

*

http://methanex.com/role/SupplementalCashFlowInformationTables
351 Implied Table Table

*

*

implied:Table
352 Cash Flow Statement [Abstract] Abstract mx:CashFlowStatementAbstract
353 Changes in non-cash working capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAdditionalInformationAboutUnderstandingFinancialPositionsAndLiquidityOfEntityExplanatory
354 Reconciliation of liabilities arising from financing activities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
355 2349301 - Disclosure - Capital disclosures (Tables) Network

*

*

http://methanex.com/role/CapitalDisclosuresTables
356 Implied Table Table

*

*

implied:Table
357 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract mx:CorporateInformationAndStatementOfIFRSComplianceAbstract
358 Schedule of liquidity and capitalization Concept (Text Block (HTML)) For Period mx:DisclosureOfLiquidityAndCapitalizationTableTextBlock
359 2352301 - Disclosure - Financial instruments (Tables) Network

*

*

http://methanex.com/role/FinancialInstrumentsTables
360 Implied Table Table

*

*

implied:Table
361 Financial Instruments [Abstract] Abstract mx:FinancialInstrumentsAbstract
362 Fair value measurement of assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
363 Maturity profile of fair value liabilities Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForDerivativeFinancialLiabilities
364 Fair value measurement of liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
365 2355301 - Disclosure - Financial risk management (Tables) Network

*

*

http://methanex.com/role/FinancialRiskManagementTables
366 Implied Table Table

*

*

implied:Table
367 Financial Instruments [Abstract] Abstract mx:FinancialInstrumentsAbstract
368 Schedule of interest rate risk exposure Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsExplanatory
369 Expected cash flows of financial liabilities by maturity date Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfManagingLiquidityRisk
370 2358301 - Disclosure - Retirement plans (Tables) Network

*

*

http://methanex.com/role/RetirementPlansTables
371 Implied Table Table

*

*

implied:Table
372 Employee Benefits [Abstract] Abstract mx:EmployeeBenefitsAbstract
373 Disclosure of net defined benefit liability (asset) Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
374 Expense recognized in the income statement Concept (Text Block (HTML)) For Period mx:DisclosureOfDefinedBenefitPlanExpenseRecognizedInProfitOrLossExplanatoryTableTextBlock
375 Expense recognized in other comprehensive income Concept (Text Block (HTML)) For Period mx:DisclosureOfDefinedBenefitPlanExpenseRecognizedInOtherComprehensiveIncomeExplanatoryTableTextBlock
376 Disclosure of fair value of plan assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
377 2361301 - Disclosure - Commitments and contingencies (Tables) Network

*

*

http://methanex.com/role/CommitmentsAndContingenciesTables
378 Implied Table Table

*

*

implied:Table
379 Commitments And Contingencies [Abstract] Abstract mx:CommitmentsAndContingenciesAbstract
380 Schedule of minimum estimated commitment under purchase contracts Concept (Text Block (HTML)) For Period mx:ContingentLiabilitiesWithAssociatesTableTextBlock
381 Schedule of minimum lease payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
382 2364301 - Disclosure - Related parties (Tables) Network

*

*

http://methanex.com/role/RelatedPartiesTables
383 Implied Table Table

*

*

implied:Table
384 Related Party [Abstract] Abstract mx:RelatedPartyAbstract
385 Disclosure of interests in subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
386 Disclosure of transactions between related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
387 2367301 - Disclosure - Non-controlling interests (Tables) Network

*

*

http://methanex.com/role/NonControllingInterestsTables
388 Implied Table Table

*

*

implied:Table
389 Interest In Other Entities [Abstract] Abstract mx:InterestInOtherEntitiesAbstract
390 Summary of financial information for each subsidiary with non-controlling interests Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
391 2404402 - Disclosure - Significant accounting policies - Property plant and equipment (Details) Network

*

*

http://methanex.com/role/SignificantAccountingPoliciesPropertyPlantAndEquipmentDetails
392 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
393 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
394 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
395 Buildings, plant installations and machinery Member mx:BuildingsPlantInstallationsAndMachineryMember
396 Range [axis] Axis ifrs-full:RangeAxis
397 Ranges [member] Member ifrs-full:RangesMember
398 Bottom of range Member ifrs-full:BottomOfRangeMember
399 Top of range Member ifrs-full:TopOfRangeMember
400 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
401 Estimated useful lives Concept (xbrli:durationItemType) For Period mx:UsefulLivesOrDepreciationRatesPropertyPlantandEquipmentPeriod
402 2404403 - Disclosure - Significant accounting policies - Share-based compensation (Details) Network

*

*

http://methanex.com/role/SignificantAccountingPoliciesShareBasedCompensationDetails
403 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
404 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
405 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
406 Performance shares Member mx:PerformanceShares1Member
407 Vesting [Axis] Axis mx:Vesting1Axis
408 Vesting [Domain] Member mx:Vesting1Domain
409 Grants prior to 2015 Member mx:SharebasedCompensationAwardTrancheOne1Member
410 Grants subsequent to 2015 Member mx:SharebasedCompensationAwardTrancheTwo1Member
411 Range [axis] Axis ifrs-full:RangeAxis
412 Ranges [member] Member ifrs-full:RangesMember
413 Bottom of range Member ifrs-full:BottomOfRangeMember
414 Top of range Member ifrs-full:TopOfRangeMember
415 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
416 Share-based compensation arrangement vesting rights, percentage Concept (Percent) For Period mx:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1
417 2404404 - Disclosure - Significant accounting policies - Segmented information (Details) Network

*

*

http://methanex.com/role/SignificantAccountingPoliciesSegmentedInformationDetails
418 Implied Table Table

*

*

implied:Table
419 Corporate Information And Statement Of IFRS Compliance [Abstract] Abstract mx:CorporateInformationAndStatementOfIFRSComplianceAbstract
420 Number of operating segments Concept (Integer) For Period mx:NumberOfOperatingSegments1
421 2404405 - Disclosure - Significant accounting policies - Anticipated changes to International Financial Reporting Standards (Details) Network

*

*

http://methanex.com/role/SignificantAccountingPoliciesAnticipatedChangesToInternationalFinancialReportingStandardsDetails
422 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
423 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
424 New IFRSs [member] Member ifrs-full:NewIFRSsMember
425 IFRS 16, Leases Member mx:InAccordanceWithIFRS16Member
426 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
427 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
428 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
429 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
430 2407402 - Disclosure - Trade and other receivables (Details) Network

*

*

http://methanex.com/role/TradeAndOtherReceivablesDetails
431 Implied Table Table

*

*

implied:Table
432 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
433 Trade Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
434 Value-added and other tax receivables Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
435 Egypt gas contract recoveries Concept (Monetary) As Of Debit mx:CurrentReceivablesForContractRecovery
436 Other Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
437 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
438 2410401 - Disclosure - Inventories (Details) Network

*

*

http://methanex.com/role/InventoriesDetails
439 Implied Table Table

*

*

implied:Table
440 Inventories [Abstract] Abstract mx:InventoriesAbstract
441 Cost of inventories recognized as expense Concept (Monetary) For Period Debit ifrs-full:CostOfInventoriesRecognisedAsExpenseDuringPeriod
442 2413402 - Disclosure - Property, plant and equipment (Details) Network

*

*

http://methanex.com/role/PropertyPlantAndEquipmentDetails
443 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
444 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
445 Carrying amount [member] Member ifrs-full:CarryingAmountMember
446 Cost Member ifrs-full:GrossCarryingAmountMember
447 Accumulated depreciation Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
448 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
449 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
450 Buildings, plant installations and machinery Member mx:BuildingsPlantInstallationsAndMachineryMember
451 Finance leases Member mx:PropertyPlantAndEquipmentUnderFinanceLeasesMember
452 Ocean going vessels Member ifrs-full:ShipsMember
453 Other Member ifrs-full:OtherPropertyPlantAndEquipmentMember
454 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
455 Reconciliation of changes in property, plant and equipment [abstract] Abstract ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
456 Value at beginning of period Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
457 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
458 Disposals and other Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
459 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
460 Value at end of period Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
461 Number of finance lease vessels Concept (Integer) As Of mx:NumberOfVesselsDelivered
462 2416402 - Disclosure - Investment in associate - Additional information (Details) Network

*

*

http://methanex.com/role/InvestmentInAssociateAdditionalInformationDetails
463 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
464 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
465 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
466 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
467 Legal Entity [Axis] Axis dei:LegalEntityAxis
468 Entity [Domain] Member dei:EntityDomain
469 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
470 Types of contracts [axis] Axis ifrs-full:TypesOfContractsAxis
471 Types of contracts [member] Member ifrs-full:TypesOfContractsMember
472 Fixed-price contracts Member ifrs-full:FixedpriceContractsMember
473 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
474 Products and services [member] Member ifrs-full:ProductsAndServicesMember
475 Methanol Member mx:MethanolMember
476 Tax Period1 [Axis] Axis mx:TaxPeriod1Axis
477 Tax Period1 [Domain] Member mx:TaxPeriod1Domain
478 2005 through 2014 Member mx:TaxYear2005Through2014Member
479 Late 2014 through 2019 Member mx:TaxYear2014Through2019Member
480 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
481 Percentage of ownership interest in associates Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
482 Annual methanol production facility owned (in tonnes) Concept (num:massItemType) For Period mx:AnnualMassOfMethanolProductionOwned
483 Percentage of sales Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
484 2416403 - Disclosure - Investment in associate - Statements of financial position (Details) Network

*

*

http://methanex.com/role/InvestmentInAssociateStatementsOfFinancialPositionDetails
485 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
486 Legal Entity [Axis] Axis dei:LegalEntityAxis
487 Entity [Domain] Member dei:EntityDomain
488 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
489 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
490 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
491 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
492 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
493 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
494 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
495 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
496 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
497 Other long-term liabilities, including current maturities Concept (Monetary) As Of Credit mx:OtherNoncurrentLiabilitiesIncludingCurrentMaturities
498 Net assets Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
499 Long-term receivable from Atlas Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesDueFromRelatedParties
500 Investment in associate Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
501 Percentage of ownership interest in associates Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
502 2416404 - Disclosure - Investment in associate - Statements of income (Details) Network

*

*

http://methanex.com/role/InvestmentInAssociateStatementsOfIncomeDetails
503 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
504 Legal Entity [Axis] Axis dei:LegalEntityAxis
505 Entity [Domain] Member dei:EntityDomain
506 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
507 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
508 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
509 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
510 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
511 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
512 Cost of sales and depreciation and amortization Concept (Monetary) For Period Debit mx:CostOfSalesIncludingDepreciationAndAmortisationExpense
513 Operating income Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
514 Finance costs, finance income and other expenses Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
515 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
516 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
517 Dividends received from associate Concept (Monetary) For Period Debit ifrs-full:DividendsReceived
518 Percentage of ownership interest in associates Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
519 2419402 - Disclosure - Other assets - Schedule (Details) Network

*

*

http://methanex.com/role/OtherAssetsScheduleDetails
520 Implied Table Table

*

*

implied:Table
521 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
522 Restricted cash Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
523 Restricted cash and cash equivalents for vessels under construction Concept (Monetary) As Of Debit ifrs-full:AssetsToWhichSignificantRestrictionsApply
524 Chile VAT receivable Concept (Monetary) As Of Debit ifrs-full:ValueAddedTaxReceivables
525 Investment in Carbon Recycling International Concept (Monetary) As Of Debit ifrs-full:InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
526 Defined benefit pension plans (note 20) Concept (Monetary) As Of Debit ifrs-full:RecognisedAssetsDefinedBenefitPlan
527 Other Concept (Monetary) As Of Debit mx:OtherMiscellaneousAssets
528 Total other assets Concept (Monetary) As Of Debit ifrs-full:OtherAssets
529 Less current portion Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
530 Other assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
531 2419403 - Disclosure - Other assets - Narrative (Details) Network

*

*

http://methanex.com/role/OtherAssetsNarrativeDetails
532 Implied Table Table

*

*

implied:Table
533 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
534 Restricted cash and cash equivalents for vessels under construction Concept (Monetary) As Of Debit ifrs-full:AssetsToWhichSignificantRestrictionsApply
535 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
536 2422402 - Disclosure - Long-term debt - Schedule (Details) Network

*

*

http://methanex.com/role/LongTermDebtScheduleDetails
537 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
538 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
539 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
540 Unsecured notes Member mx:UnsecuredDebt1Member
541 3.25% due December 15, 2019 Member mx:UnsecuredDebtThreePointTwentyFivePercentDueDecemberFifteenTwoThousandNineteenMember
542 5.25% due March 1, 2022 Member mx:UnsecuredDebtFivePointTwentyFivePercentDueMarchOneTwoThousandTwentyTwoMember
543 4.25% due December 1, 2024 Member mx:UnsecuredDebtFourPointTwentyFivePercentDueDecemberOneTwoThousandTwentyFourMember
544 5.65% due December 1, 2044 Member mx:UnsecuredDebtFivePointSixtyFivePercentDueDecemberOneTwoThousandFortyFourMember
545 Egypt limited recourse debt facilities Member mx:EgyptLimitedRecourseDebtFacilitiesMember
546 Other limited recourse debt facilities Member mx:OtherLimitedRecourseDebtFacilitiesMember
547 LIBOR Plus 0.75% to LIBOR Plus 2.5% due 2019 to 2021 Member mx:OtherLimitedRecourseDebtFacilitiesLIBORPlusSpreadMember
548 5.58% due June 30, 2031 Member mx:OtherLimitedRecourseDebtFacilities5.58Member
549 5.35% due September 30, 2033 Member mx:OtherLimitedRecourseDebtFacilities5.35Member
550 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
551 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
552 Fixed interest rate Member ifrs-full:FixedInterestRateMember
553 LIBOR Member ifrs-full:FloatingInterestRateMember
554 Range [axis] Axis ifrs-full:RangeAxis
555 Ranges [member] Member ifrs-full:RangesMember
556 Bottom of range Member ifrs-full:BottomOfRangeMember
557 Top of range Member ifrs-full:TopOfRangeMember
558 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
559 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
560 Basis spread, percent Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
561 Total long-term debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
562 Less current maturities Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
563 Non-current portion of long-term debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
564 Debt discounts and deferred financing fees Concept (Monetary) As Of Debit mx:DebtInstrumentUnamortizedDiscountandDeferredFinanceCost
565 2422403 - Disclosure - Long-term debt - Narrative (Details) Network

*

*

http://methanex.com/role/LongTermDebtNarrativeDetails
566 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
567 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
568 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
569 Egypt limited recourse debt facilities Member mx:EgyptLimitedRecourseDebtFacilitiesMember
570 Other limited recourse debt facilities Member mx:OtherLimitedRecourseDebtFacilitiesMember
571 Other limited recourse debt facilities, 5.35% due September 30, 2033 Member mx:OtherLimitedRecourseDebtFacilities5.35Member
572 Other limited recourse debt facilities, 5.58% due June 30, 2031 Member mx:OtherLimitedRecourseDebtFacilities5.58Member
573 Revolving credit facility Member mx:RevolvingCreditFacility1Member
574 Range [axis] Axis ifrs-full:RangeAxis
575 Ranges [member] Member ifrs-full:RangesMember
576 Minimum Member ifrs-full:BottomOfRangeMember
577 Maximum Member ifrs-full:TopOfRangeMember
578 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
579 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
580 LIBOR Member ifrs-full:FloatingInterestRateMember
581 Fixed interest rate Member ifrs-full:FixedInterestRateMember
582 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
583 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
584 50% owned subsidiary Member mx:FiftyPercentOwnedSubsidiaryMember
585 Ownership [Axis] Axis mx:Ownership1Axis
586 Ownership [Domain] Member mx:Ownership1Domain
587 Egypt entity Member mx:EgyptEntityMember
588 Legal Entity [Axis] Axis dei:LegalEntityAxis
589 Entity [Domain] Member dei:EntityDomain
590 Egypt entity Member mx:EgyptEntityMember
591 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
592 Basis spread, percent Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
593 Ownership rate Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
594 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
595 Borrowings, interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
596 Repayments of borrowings Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
597 Number of vessels to be acquired Concept (Integer) As Of mx:NumberOfVessels
598 Accretion of deferred financing costs Concept (Monetary) For Period Debit mx:AmortizationOfDebtIssuanceCosts
599 Debt covenant, EBITDA to interest coverage ratio Concept (Pure) For Period mx:DebtInstrumentCovenantEBITDAToInterestCoverageRatio
600 Debt covenant, debt to capitalization ratio (less than or equal) Concept (Percent) For Period mx:DebtInstrumentCovenantDebtToCapitalizationRatio
601 Default payment accelerated by a creditor, amount of indebtedness (or more) Concept (Monetary) As Of Credit mx:DebtDefaultAcceleratedByCreditorLongTermDebtAmount
602 Default that permits a creditor to demand repayment, amount of indebtedness (or more) Concept (Monetary) As Of Credit mx:DebtDefaultCreditorIsPermittedToDemandRepaymentLongTermDebtAmount
603 Percentage of gas requirements (greater than) Concept (Percent) For Period mx:BorrowingsCovenantAverageGasDeliveryPercentageAboveGasRequirement
604 2422404 - Disclosure - Long-term debt - Maturity (Details) Network

*

*

http://methanex.com/role/LongTermDebtMaturityDetails
605 Disclosure of maturity analysis for non-derivative financial liabilities [table] Table

*

*

ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
606 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
607 Carrying amount [member] Member ifrs-full:CarryingAmountMember
608 Carrying amount Member ifrs-full:GrossCarryingAmountMember
609 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
610 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
611 Egypt limited recourse debt facilities Member mx:EgyptLimitedRecourseDebtFacilitiesMember
612 Other limited recourse debt facilities Member mx:OtherLimitedRecourseDebtFacilitiesMember
613 Unsecured notes Member mx:UnsecuredDebt1Member
614 Maturity [axis] Axis ifrs-full:MaturityAxis
615 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
616 2019 Member ifrs-full:NotLaterThanOneYearMember
617 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
618 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
619 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
620 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
621 Thereafter Member ifrs-full:LaterThanFiveYearsMember
622 Disclosure of maturity analysis for non-derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
623 Long-term debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
624 2425402 - Disclosure - - Other long-term liabilities (Details) Network

*

*

http://methanex.com/role/OtherLongTermLiabilitiesDetails
625 Implied Table Table

*

*

implied:Table
626 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
627 Site restoration costs Concept (Monetary) As Of Credit ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCosts
628 Finance lease obligations Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
629 Share-based compensation liability (note 13) Concept (Monetary) As Of Credit ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011
630 Cash flow hedges (note 18) Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
631 Defined benefit pension plans (note 20) Concept (Monetary) As Of Credit ifrs-full:ProvisionsForEmployeeBenefits
632 Land mortgage Concept (Monetary) As Of Credit ifrs-full:DebtSecurities
633 Other Concept (Monetary) As Of Credit mx:OtherSundryLiabilitiesNoncurrent1
634 Other long-term liabilities, total Concept (Monetary) As Of Credit ifrs-full:OtherLiabilities
635 Less current maturities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
636 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
637 2425403 - Disclosure - Other long-term liabilities - Narrative (Details) Network

*

*

http://methanex.com/role/OtherLongTermLiabilitiesNarrativeDetails
638 Implied Table Table

*

*

implied:Table
639 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
640 Undiscounted amount of estimated cash flows required to settle liabilities Concept (Monetary) For Period Credit mx:UndiscountedEstimatedCashFlowsRequiredToSettleLiabilities
641 Number of vessels delivered Concept (Integer) As Of mx:NumberOfVesselsDelivered
642 Total finance lease payments Concept (Monetary) For Period Credit mx:PaymentsOfFinanceLeaseLiabilitiesIncludingInterestClassifiedAsFinancingActivities
643 Interest expense on finance leases Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnFinanceLeases
644 2425404 - Disclosure - Other long-term liabilities - Provision for site restoration costs (Details) Network

*

*

http://methanex.com/role/OtherLongTermLiabilitiesProvisionForSiteRestorationCostsDetails
645 Disclosure of other provisions [table] Table

*

*

ifrs-full:DisclosureOfOtherProvisionsTable
646 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
647 Other provisions [member] Member ifrs-full:OtherProvisionsMember
648 Provision for site restoration costs Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
649 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
650 Reconciliation of changes in other provisions [abstract] Abstract ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract
651 Balance at beginning of period Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
652 New or revised provisions Concept (Monetary) For Period Credit ifrs-full:AdditionalProvisionsOtherProvisions
653 Accretion expense Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions
654 Balance at end of period Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
655 2425405 - Disclosure - Other long-term liabilities - Finance lease obligations (Details) Network

*

*

http://methanex.com/role/OtherLongTermLiabilitiesFinanceLeaseObligationsDetails
656 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
657 Maturity [axis] Axis ifrs-full:MaturityAxis
658 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
659 2019 Member ifrs-full:NotLaterThanOneYearMember
660 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
661 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
662 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
663 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
664 Thereafter Member ifrs-full:LaterThanFiveYearsMember
665 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
666 Lease payments Concept (Monetary) As Of Credit ifrs-full:GrossFinanceLeaseObligations
667 Interest component Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
668 Finance lease obligations Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
669 2428402 - Disclosure - Expenses (Details) Network

*

*

http://methanex.com/role/ExpensesDetails
670 Implied Table Table

*

*

implied:Table
671 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
672 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
673 Selling and distribution Concept (Monetary) For Period Debit mx:SellingExpenseAndDistributionCosts
674 Administrative expenses Concept (Monetary) For Period Debit ifrs-full:AdministrativeExpense
675 Total expenses by function Concept (Monetary) For Period Debit mx:ExpensesByFunction
676 Cost of raw materials and purchased methanol Concept (Monetary) For Period Debit ifrs-full:RawMaterialsAndConsumablesUsed
677 Ocean freight and other logistics Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
678 Employee expenses, including share-based compensation Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
679 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
680 Cost of sales and operating expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
681 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
682 Total expenses by nature Concept (Monetary) For Period Debit ifrs-full:ExpenseByNature
683 Adjustments for share-based payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
684 2431401 - Disclosure - Finance costs (Details) Network

*

*

http://methanex.com/role/FinanceCostsDetails
685 Implied Table Table

*

*

implied:Table
686 Borrowing costs [abstract] Abstract ifrs-full:BorrowingCostsAbstract
687 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
688 2434402 - Disclosure - Net income per common share - Reconciliation of numerator used for calculation of diluted net income per common share (Details) Network

*

*

http://methanex.com/role/NetIncomePerCommonShareReconciliationOfNumeratorUsedForCalculationOfDilutedNetIncomePerCommonShareDetails
689 Implied Table Table

*

*

implied:Table
690 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
691 Numerator for diluted net income per common share Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
692 Adjustment for the effect of TSARs: Abstract mx:DilutiveSecuritiesEffectonBasicEarningsPerShareShareBasedCompensationArrangementsAbstract
693 Cash-settled recovery included in net income Concept (Monetary) For Period Credit mx:DilutiveSecuritiesEffectonBasicEarningsPerShareTandemStockAppreciationRightsCashSettledRecovery
694 Equity-settled expense Concept (Monetary) For Period Credit mx:DilutiveSecuritiesEffectonBasicEarningsPerShareTandemStockAppreciationRightsEquitySettledExpense
695 Numerator for diluted net income per common share Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects
696 2434403 - Disclosure - Net income per common share - Reconciliation of denominator used for calculation of basic and diluted net income per common share (Details) Network

*

*

http://methanex.com/role/NetIncomePerCommonShareReconciliationOfDenominatorUsedForCalculationOfBasicAndDilutedNetIncomePerCommonShareDetails
697 Implied Table Table

*

*

implied:Table
698 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
699 Denominator for basic net income per common share Concept (Shares) For Period ifrs-full:WeightedAverageShares
700 Effect of dilutive stock options Concept (Shares) For Period ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
701 Effect of dilutive TSARS Concept (Shares) For Period mx:DilutiveSecuritiesEffectOnBasicEarningsPerShareTandemShareAppreciationRights
702 Denominator for diluted net income per common share Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
703 2434404 - Disclosure - Net income per common share - Basic and diluted (Details) Network

*

*

http://methanex.com/role/NetIncomePerCommonShareBasicAndDilutedDetails
704 Implied Table Table

*

*

implied:Table
705 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
706 Basic net income per common share (in usd per share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
707 Diluted net income per common share (in usd per share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
708 2437402 - Disclosure - Share-based compensation - Narrative (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationNarrativeDetails
709 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
710 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
711 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
712 SARs and TSARs Member mx:ShareAppreciationRightsSARAndTandemShareAppreciationRightsTSARMember
713 Deferred, Restricted and Performance Share Units Member mx:DeferredShareUnitsDSURestrictedShareUnitsRSUAndPerformanceShareUnitsPSUMember
714 Stock Options Member mx:EmployeeStockOption1Member
715 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
716 Number of shares reserved for future grants of stock options and share appreciation rights Concept (Shares) As Of ifrs-full:SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares
717 Maximum term Concept (xbrli:durationItemType) For Period mx:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod2
718 Share-based compensation arrangement vesting rights, percentage Concept (Percent) For Period mx:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage1
719 Fair value of share-based payment transactions Concept (Monetary) As Of Credit mx:FairValueOfSharesFromShareBasedPaymentTransactions
720 Liabilities from share-based payment transactions Concept (Monetary) As Of Credit ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011
721 Intrinsic value of liabilities from share-based payment transactions Concept (Monetary) As Of Credit ifrs-full:IntrinsicValueOfLiabilitiesFromSharebasedPaymentTransactionsForWhichCounterpartysRightToCashOrOtherAssetsVested2011
722 Weighted average remaining vesting period Concept (xbrli:durationItemType) For Period mx:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition2
723 Expense from share-based payment transactions with employees Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
724 Expense from share-based payment transactions with employees, effect of change in share price Concept (Monetary) For Period Debit mx:ExpenseFromShareBasedPaymentTransactionsWithEmployeesEffectOfChangeInSharePrice
725 2437403 - Disclosure - Share-based compensation - Changes in SARs and TSARs (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationChangesInSarsAndTsarsDetails
726 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
727 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
728 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
729 SARs Member mx:ShareAppreciationRightsSARMember
730 TSARs Member mx:TandemShareAppreciationRightsTSARMember
731 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
732 Number of outstanding units, beginning of period Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
733 Number of outstanding units granted Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
734 Number of outstanding units exercised Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
735 Number of outstanding units cancelled Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
736 Number of outstanding units expired Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
737 Number of outstanding units, end of period Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
738 Exercise price of outstanding units, beginning of period (in usd per unit) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
739 Exercise price of outstanding units granted (in usd per unit) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement
740 Exercise price of outstanding units exercised (in usd per unit) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
741 Exercise price of outstanding units cancelled (in usd per unit) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
742 Exercise price of outstanding units expired (in usd per unit) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
743 Exercise price of outstanding units, end of period (in usd per unit) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
744 2437404 - Disclosure - Share-based compensation - Range of exercise prices in SARs and TSARs (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationRangeOfExercisePricesInSarsAndTsarsDetails
745 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
746 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
747 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
748 SARs Member mx:ShareAppreciationRightsSARMember
749 TSARs Member mx:TandemShareAppreciationRightsTSARMember
750 Ranges Of Exercise Prices For Outstanding Other Equity Instruments [Axis] Axis mx:RangesOfExercisePricesForOutstandingOtherEquityInstrumentsAxis
751 Ranges Of Exercise Prices For Outstanding Other Equity Instruments [Domain] Member mx:RangesOfExercisePricesForOutstandingOtherEquityInstrumentsDomain
752 $25.97 to $35.51 Member mx:ExercisePriceRangeOneMember
753 $38.24 to $50.17 Member mx:ExercisePriceRangeTwoMember
754 $54.65 to $78.59 Member mx:ExercisePriceRangeThreeMember
755 Range [axis] Axis ifrs-full:RangeAxis
756 Ranges [member] Member ifrs-full:RangesMember
757 Minimum Member ifrs-full:BottomOfRangeMember
758 Maximum Member ifrs-full:TopOfRangeMember
759 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
760 Weighted average remaining contractual life (years) Concept (Decimal) As Of mx:WeightedAverageRemainingContractualLifeOfOutstandingOtherEquityInstruments
761 Number of units outstanding Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
762 Weighted average exercise price of units outstanding (in usd per unit) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
763 Number of units exercisable Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
764 Weighted average exercise price of units exercisable (in usd per unit) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
765 2437405 - Disclosure - Share-based compensation - Weighted average assumptions (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationWeightedAverageAssumptionsDetails
766 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
767 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
768 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
769 SARs and TSARs Member mx:ShareAppreciationRightsSARAndTandemShareAppreciationRightsTSARMember
770 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
771 Risk-free interest rate Concept (Percent) For Period mx:RiskFreeInterestRateOtherEquityInstrumentsGranted
772 Expected dividend yield Concept (Percent) For Period mx:ExpectedDividendAsPercentageOtherEquityInstrumentsGranted
773 Expected life of SARs and TSARs (years) Concept (Decimal) For Period mx:OtherEquityInstrumentsLifeOtherEquityInstrumentsGranted
774 Expected volatility Concept (Percent) For Period mx:ExpectedVolatilityOtherEquityInstrumentsGranted
775 Expected forfeitures Concept (Percent) For Period mx:ExpectedForfeitureAsPercentageOtherEquityInstrumentsGranted
776 Weighted average fair value (USD per share) Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
777 2437406 - Disclosure - Share-based compensation - Changes in other equity instruments (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationChangesInOtherEquityInstrumentsDetails
778 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
779 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
780 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
781 Deferred share units Member mx:DeferredShareUnitsDSUMember
782 Restricted share units Member mx:RestrictedShareUnitsRSUMember
783 Performance share units Member mx:PerformanceShareUnitsPSUMember
784 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
785 Number of outstanding units, beginning of period Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
786 Number of outstanding units granted Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
787 Number of outstanding units performance factor impact on redemption Concept (Decimal) For Period mx:NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementAdjustedByPerformanceFactorOnRedemption
788 Number of outstanding units granted in lieu of dividends Concept (Decimal) For Period mx:NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementInLieuOfDividends
789 Number of outstanding units redeemed Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
790 Number of outstanding units cancelled Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
791 Number of outstanding units, end of period Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
792 2437407 - Disclosure - Share-based compensation - Changes in stock options (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationChangesInStockOptionsDetails
793 Implied Table Table

*

*

implied:Table
794 Share-Based Payment Arrangements [Abstract] Abstract mx:ShareBasedPaymentArrangementsAbstract
795 Number of stock options outstanding, beginning of period Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
796 Number of stock options granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
797 Number of stock options exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
798 Number of stock options cancelled Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
799 Number of stock options outstanding, end of period Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
800 Weighted average exercise price of stock options outstanding, beginning of period (in usd per option) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
801 Weighted average exercise price of stock options granted (in usd per option) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
802 Weighted average exercise price of stock options exercised (in usd per option) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
803 Weighted average exercise price of stock options cancelled (in usd per option) Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
804 Weighted average exercise price of stock options outstanding, end of period (in usd per option) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
805 2437408 - Disclosure - Share-based compensation - Range of exercise prices in stock options (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationRangeOfExercisePricesInStockOptionsDetails
806 Disclosure of number and weighted average remaining contractual life of outstanding share options [table] Table

*

*

ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsTable
807 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
808 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
809 $25.97 to $35.51 Member mx:ExercisePriceRangeOneMember
810 $38.24 to $50.17 Member mx:ExercisePriceRangeTwoMember
811 $54.65 to $78.59 Member mx:ExercisePriceRangeThreeMember
812 Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] LineItems ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems
813 Weighted average remaining contractual life (years) Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
814 Number of stock options outstanding Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
815 Weighted average exercise price (in usd per option) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
816 Number of stock options exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
817 Weighted average exercise price (in usd per option) Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
818 2437408 - Disclosure - Share-based compensation - Range of exercise prices in stock options (Details) Network

*

*

http://methanex.com/role/ShareBasedCompensationRangeOfExercisePricesInStockOptionsDetails
819 Disclosure of range of exercise prices of outstanding share options [table] Table

*

*

ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable
820 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
821 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
822 $25.97 to $35.51 Member mx:ExercisePriceRangeOneMember
823 $38.24 to $50.17 Member mx:ExercisePriceRangeTwoMember
824 $54.65 to $78.59 Member mx:ExercisePriceRangeThreeMember
825 Range [axis] Axis ifrs-full:RangeAxis
826 Ranges [member] Member ifrs-full:RangesMember
827 Minimum Member ifrs-full:BottomOfRangeMember
828 Maximum Member ifrs-full:TopOfRangeMember
829 Disclosure of range of exercise prices of outstanding share options [line items] LineItems ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems
830 Exercise price of outstanding share options Concept (Monetary) As Of ifrs-full:ExercisePriceOfOutstandingShareOptions
831 2440402 - Disclosure - Segmented information - Revenue attributed to geographic location (Details) Network

*

*

http://methanex.com/role/SegmentedInformationRevenueAttributedToGeographicLocationDetails
832 Disclosure of geographical areas [table] Table

*

*

ifrs-full:DisclosureOfGeographicalAreasTable
833 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
834 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
835 China Member mx:CHINAMember
836 Europe Member mx:EUROPEMember
837 United States Member mx:UNITEDSTATESMember
838 South Korea Member mx:KOREAREPUBLICOFMember
839 South America Member mx:SOUTHAMERICAMember
840 Canada Member mx:CANADAMember
841 Other Asia Member mx:OTHERASIAMember
842 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
843 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
844 2440403 - Disclosure - Segmented information - Property, plant and equipment, net (Details) Network

*

*

http://methanex.com/role/SegmentedInformationPropertyPlantAndEquipmentNetDetails
845 Disclosure of geographical areas [table] Table

*

*

ifrs-full:DisclosureOfGeographicalAreasTable
846 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
847 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
848 United States Member mx:UNITEDSTATESMember
849 Egypt Member mx:EGYPTMember
850 New Zealand Member mx:NEWZEALANDMember
851 Trinidad Member mx:TRINIDADANDTOBAGOMember
852 Canada Member mx:CANADAMember
853 Chile Member mx:CHILEMember
854 Other Member mx:OtherCountriesMember
855 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
856 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
857 2443402 - Disclosure - Income and other taxes - Income tax expense (Details) Network

*

*

http://methanex.com/role/IncomeAndOtherTaxesIncomeTaxExpenseDetails
858 Implied Table Table

*

*

implied:Table
859 Income Taxes [Abstract] Abstract mx:IncomeTaxesAbstract
860 Current tax recovery (expense): Abstract ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsAbstract
861 Current period before undernoted items Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
862 Benefit from unrecognised loss carry forwards Concept (Monetary) For Period Credit ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceCurrentTaxExpense
863 Adjustments to prior years Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
864 Current tax recovery (expense) Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
865 Deferred tax recovery (expense): Abstract ifrs-full:DeferredTaxExpenseIncomeAbstract
866 Origination and reversal of temporary differences Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
867 Adjustments to prior years Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
868 Change in U.S. tax rate Concept (Monetary) For Period Debit mx:DeferredTaxExpenseIncomeRelatingToUnitedStatesTaxRateChangesOrImpositionOfNewTaxes
869 Change in other jurisdictions tax rates Concept (Monetary) For Period Debit mx:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxesInOtherJurisdictions
870 Other Concept (Monetary) For Period Debit ifrs-full:OtherComponentsOfDeferredTaxExpenseIncome
871 Deferred tax recovery (expense) Concept (Monetary) For Period Debit mx:DeferredTaxExpenseIncomeAndAdjustmentsForDeferredTaxOfPriorPeriods
872 Tax expense (income), continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
873 2443403 - Disclosure - Income and other taxes - Reconciliation of effective tax (Details) Network

*

*

http://methanex.com/role/IncomeAndOtherTaxesReconciliationOfEffectiveTaxDetails
874 Implied Table Table

*

*

implied:Table
875 Income Taxes [Abstract] Abstract mx:IncomeTaxesAbstract
876 Income before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
877 Deduct earnings of associate Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
878 Income (loss) before income taxes after deduction of earnings of associate Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
879 Canadian statutory tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
880 Income tax expense calculated at Canadian statutory tax rate Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
881 Increase (decrease) in income tax expense resulting from: Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
882 Impact of income and losses taxed in foreign jurisdictions Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
883 Utilization of unrecognised loss carryforwards and temporary differences Concept (Monetary) For Period Debit mx:TaxEffectOfUnrecognizedLossCarryforwardsAndTemporaryDifferences
884 Impact of tax rate changes in the U.S. Concept (Monetary) For Period Debit mx:TaxEffectFromChangeInUnitedStatesTaxRate
885 Impact of tax rate changes in other jurisdictions Concept (Monetary) For Period Debit mx:TaxEffectFromChangeInTaxRateInOtherJurisdictions
886 Impact of foreign exchange Concept (Monetary) For Period Debit mx:TaxEffectOfForeignExchanges
887 Other business taxes Concept (Monetary) For Period Debit mx:TaxEffectOfOtherBusinessTaxes
888 Tax effect of recovery (expenses) that are not taxable (deductible) for tax purposes Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
889 Adjustments to prior years Concept (Monetary) For Period Debit mx:TaxEffectOfAdjustmentsForCurrentTaxOfPriorPeriods
890 Other Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
891 Tax expense (income), continuing operations Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
892 2443404 - Disclosure - Income and other taxes - Net deferred income tax liabilities (Details) Network

*

*

http://methanex.com/role/IncomeAndOtherTaxesNetDeferredIncomeTaxLiabilitiesDetails
893 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
894 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
895 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
896 Property, plant and equipment Member mx:PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember
897 Repatriation taxes Member mx:RepatriationRelatedTemporaryDifferencesMember
898 Other Member mx:OtherTemporaryDifferencesWithLiabilityBalancesMember
899 Temporary differences including temporary differences with liability balances Member mx:TemporaryDifferencesIncludingTemporaryDifferencesWithLiabilityBalancesMember
900 Non-capital loss carryforwards Member ifrs-full:UnusedTaxLossesMember
901 Share-based compensation Member mx:ShareBasedCompensationRelatedTemporaryDifferencesMember
902 Other Member mx:OtherTemporaryDifferencesWithAssetBalancesMember
903 Temporary differences including temporary differences with asset balances Member mx:TemporaryDifferencesIncludingTemporaryDifferencesWithAssetBalancesMember
904 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
905 Net Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
906 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
907 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
908 2443405 - Disclosure - Income and other taxes - Narrative (Details) Network

*

*

http://methanex.com/role/IncomeAndOtherTaxesNarrativeDetails
909 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
910 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
911 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
912 United States Member country:US
913 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
914 Deductible temporary differences for which no deferred tax asset is recognised Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
915 2443406 - Disclosure - Income and other taxes - Change in deferred income tax liabilities (Details) Network

*

*

http://methanex.com/role/IncomeAndOtherTaxesChangeInDeferredIncomeTaxLiabilitiesDetails
916 Implied Table Table

*

*

implied:Table
917 Income Taxes [Abstract] Abstract mx:IncomeTaxesAbstract
918 Reconciliation of changes in deferred tax liability (asset) [abstract] Abstract ifrs-full:ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract
919 Net Abstract ifrs-full:NetDeferredTaxAssetsAndLiabilitiesAbstract
920 Net, beginning of period Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
921 Deferred income tax recovery (expense) included in net income Concept (Monetary) For Period ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
922 Impact of U.S. tax rate change in other comprehensive income Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
923 Deferred income tax recovery included in other comprehensive income Concept (Monetary) For Period Debit mx:DeferredTaxExpenseIncomeRecognisedInOtherComprehensiveIncomeLoss
924 Other Concept (Monetary) For Period Credit mx:OtherIncreaseDecreaseInDeferredTaxLiabilityAsset
925 Net, end of period Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
926 Deferred tax assets Abstract mx:DeferredTaxAssetsAbstract
927 Deferred tax assets, beginning of period Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
928 Deferred income tax recovery (expense) included in net income Concept (Monetary) For Period Debit mx:DeferredTaxAssetsDeferredTaxExpenseIncomeRecognizedInProfitOrLoss
929 Impact of U.S. tax rate change in other comprehensive income Concept (Monetary) For Period Debit mx:DeferredTaxAssetsDeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
930 Deferred income tax recovery included in other comprehensive income Concept (Monetary) For Period Debit mx:DeferredTaxAssetsIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
931 Other Concept (Monetary) For Period Debit mx:DeferredTaxAssetsOtherIncreaseDecrease
932 Deferred tax assets, end of period Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
933 Deferred tax liabilities Abstract mx:DeferredTaxLiabilities1Abstract
934 Deferred tax liabilities, beginning of period Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
935 Deferred income tax recovery (expense) included in net income Concept (Monetary) For Period Credit mx:DeferredTaxLiabilitiesDeferredTaxExpenseIncomeRecognizedInProfitOrLoss
936 Impact of U.S. tax rate change in other comprehensive income Concept (Monetary) For Period Credit mx:DeferredTaxLiabilitiesDeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
937 Deferred income tax recovery included in other comprehensive income Concept (Monetary) For Period Credit mx:DeferredTaxLiabilitiesIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
938 Other Concept (Monetary) For Period Credit mx:DeferredTaxLiabilitiesOtherIncreaseDecrease
939 Deferred tax liabilities, end of period Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
940 2446402 - Disclosure - Supplemental cash flow information - Changes in Non-cash Working Capital (Details) Network

*

*

http://methanex.com/role/SupplementalCashFlowInformationChangesInNonCashWorkingCapitalDetails
941 Implied Table Table

*

*

implied:Table
942 Cash Flow Statement [Abstract] Abstract mx:CashFlowStatementAbstract
943 Changes in non-cash working capital: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
944 Trade and other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
945 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
946 Prepaid expenses Concept (Monetary) For Period Credit mx:IncreaseDecreaseinPrepaidExpense
947 Trade, other payables and accrued liabilities, including long-term payables included in other long-term liabilities Concept (Monetary) For Period Debit mx:IncreaseDecreaseinOperatingLiabilities
948 Decrease (increase) in non-cash working capital Concept (Monetary) For Period Credit mx:IncreaseDecreaseInWorkingCapitalBeforeOtherAdjustments
949 Adjustments for items not having a cash effect and working capital changes relating to taxes and interest paid Concept (Monetary) For Period Credit mx:AdjustmentsForItemsNotHavingACashEffectAndWorkingCapitalChangesRelatingToTaxesAndInterestPaid
950 These changes relate to the following activities: Abstract mx:IncreaseDecreaseInWorkingCapitalAbstract
951 Operating Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
952 Financing Concept (Monetary) For Period Credit mx:IncreaseDecreaselnWorkingCapitalFinancingActivities
953 Investing Concept (Monetary) For Period Credit mx:IncreaseDecreaselnWorkingCapitalInvestingActivities
954 Changes in non-cash working capital Concept (Monetary) For Period Credit mx:IncreaseDecreaseInWorkingCapitalTotal
955 2446403 - Disclosure - Supplemental cash flow information - Reconciliation of Liabilities (Details) Network

*

*

http://methanex.com/role/SupplementalCashFlowInformationReconciliationOfLiabilitiesDetails
956 Disclosure of reconciliation of liabilities arising from financing activities [table] Table

*

*

ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
957 Liabilities arising from financing activities [axis] Axis ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
958 Liabilities arising from financing activities [member] Member ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
959 Long term debt (note 8) Member ifrs-full:LongtermBorrowingsMember
960 Finance lease obligations (note 9) Member ifrs-full:LeaseLiabilitiesMember
961 Disclosure of reconciliation of liabilities arising from financing activities [line items] LineItems ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
962 Outstanding at beginning of period Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
963 Changes from financing cash flows Abstract ifrs-full:ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract
964 Repayment of long-term debt and financing fees Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
965 Proceeds from limited recourse debt Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
966 Payment of finance lease liabilities Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
967 Total changes from financing cash flows Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInLiabilitiesArisingFromFinancingActivities
968 Liability-related other changes Abstract mx:LiabilityRelatedOtherChangesAbstract
969 Finance costs Concept (Monetary) For Period Debit mx:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivitiesFinanceCosts
970 New finance leases Concept (Monetary) For Period Debit mx:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivitiesFinanceLeases
971 Other Concept (Monetary) For Period Debit mx:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivitiesOther
972 Total liability-related other changes Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
973 Outstanding at end of period Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
974 2449402 - Disclosure - Capital disclosures (Details) Network

*

*

http://methanex.com/role/CapitalDisclosuresDetails
975 Disclosure of liquidity and capitalization [Table] Table

*

*

mx:DisclosureOfLiquidityAndCapitalizationTable
976 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
977 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
978 Unsecured notes Member mx:UnsecuredDebt1Member
979 Egypt limited recourse debt facilities Member mx:EgyptLimitedRecourseDebtFacilitiesMember
980 Other limited recourse debt facilities Member mx:OtherLimitedRecourseDebtFacilitiesMember
981 Revolving credit facility Member mx:RevolvingCreditFacility1Member
982 Disclosure of liquidity and capitalization [Line Items] LineItems mx:DisclosureOfLiquidityAndCapitalizationLineItems
983 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
984 Undrawn credit facilities Concept (Monetary) As Of Credit ifrs-full:UndrawnBorrowingFacilities
985 Total liquidity Concept (Monetary) As Of Debit mx:Liquidity
986 Total debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
987 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
988 Shareholders’ equity Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
989 Total capitalization Concept (Monetary) As Of Credit mx:CapitalizationLongtermDebtAndEquity1
990 Total debt to capitalization (as a percent) Concept (Percent) As Of mx:RatioOfIndebtednessToTotalCapital
991 Net debt to capitalization (as a percent) Concept (Percent) As Of mx:RatioofNetIndebtednesstoNetCapital
992 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
993 2452402 - Disclosure - Financial instruments - Fair value measurement (Details) Network

*

*

http://methanex.com/role/FinancialInstrumentsFairValueMeasurementDetails
994 Disclosure Of Financial Assets And Liabilities [Table] Table

*

*

mx:DisclosureOfFinancialAssetsAndLiabilitiesTableTable
995 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
996 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
997 Derivative instruments Member ifrs-full:DerivativesMember
998 Cash and cash equivalents Member mx:CashAndCashEquivalents1Member
999 Trade and other receivables, excluding tax receivable Member mx:TradeAndOtherReceivablesMember
1000 Restricted cash included in other assets Member mx:RestrictedCashMember
1001 Restricted cash and cash equivalents for vessels under construction included in other assets Member mx:RestrictedCashAndCashEquivalentsMember
1002 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1003 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1004 Financial assets measured at fair value Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1005 Financial assets not measured at fair value Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1006 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1007 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1008 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1009 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1010 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1011 Derivative instruments Member mx:DerivativeLiabilitiesMember
1012 Trade, other payables and accrued liabilities, excluding tax payable Member mx:TradeOtherPayablesAndAccruedLiabilitiesExcludingTaxPayableMember
1013 Long-term debt, including current portion Member ifrs-full:LongtermBorrowingsMember
1014 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1015 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
1016 Financial liabilities at fair value through other comprehensive income, category Member mx:FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1017 Financial liabilities at amortised cost, category Member ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
1018 Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] LineItems mx:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems
1019 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1020 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1021 2452403 - Disclosure - Financial instruments - Natural gas forward contracts (Details) Network

*

*

http://methanex.com/role/FinancialInstrumentsNaturalGasForwardContractsDetails
1022 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1023 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1024 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1025 Natural gas forward contract Member mx:NaturalGasForwardContractMember
1026 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1027 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1028 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1029 Real Estate And Accumulated Depreciation Description Of Property1 [Axis] Axis mx:RealEstateAndAccumulatedDepreciationDescriptionOfProperty1Axis
1030 Real Estate And Accumulated Depreciation Name Of Property1 [Domain] Member mx:RealEstateAndAccumulatedDepreciationNameOfProperty1Domain
1031 Geismar 2 Facility Member mx:Geismar2FacilityMember
1032 Medicine Hat Facility Member mx:MedicineHatFacilityMember
1033 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1034 Percentage of gas requirement for forward contracts that will be managed for changes in prices Concept (Percent) For Period mx:PercentageOfGasRequirement
1035 Hedge ineffectiveness Concept (Monetary) For Period Credit ifrs-full:GainLossOnHedgeIneffectiveness
1036 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1037 Negative fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1038 Average contract price (in usd per mmbtu) Concept (Decimal) As Of ifrs-full:AveragePriceOfHedgingInstrument
1039 Remaining term Concept (xbrli:durationItemType) For Period mx:HedgingInstrumentTerm
1040 2452404 - Disclosure - Financial instruments - Forward exchange contracts (Details) Network

*

*

http://methanex.com/role/FinancialInstrumentsForwardExchangeContractsDetails
1041 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1042 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1043 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1044 Forward exchange contract Member mx:ForeignExchangeForward1Member
1045 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1046 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1047 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1048 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1049 Hedge ineffectiveness Concept (Monetary) For Period Credit ifrs-full:GainLossOnHedgeIneffectiveness
1050 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1051 Positive fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1052 Negative fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1053 2452405 - Disclosure - Financial instruments - Maturity of derivative liabilities (Details) Network

*

*

http://methanex.com/role/FinancialInstrumentsMaturityOfDerivativeLiabilitiesDetails
1054 Disclosure of maturity analysis for derivative financial liabilities [table] Table

*

*

ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable
1055 Maturity [axis] Axis ifrs-full:MaturityAxis
1056 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1057 Within one year Member ifrs-full:NotLaterThanOneYearMember
1058 1-3 years Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
1059 3-5 years Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
1060 More than 5 years Member ifrs-full:LaterThanFiveYearsMember
1061 Disclosure of maturity analysis for derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems
1062 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
1063 2452406 - Disclosure - Financial instruments - Fair value liabilities, Narrative (Details) Network

*

*

http://methanex.com/role/FinancialInstrumentsFairValueLiabilitiesNarrativeDetails
1064 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1065 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1066 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1067 Financial assets measured at fair value Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1068 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1069 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1070 Derivative instruments Member ifrs-full:DerivativesMember
1071 Types of hedges [axis] Axis ifrs-full:TypesOfHedgesAxis
1072 Hedges [member] Member ifrs-full:TypesOfHedgesMember
1073 Cash flow hedges Member ifrs-full:CashFlowHedgesMember
1074 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1075 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
1076 2452407 - Disclosure - Financial instruments - Carrying values of financial instruments (Details) Network

*

*

http://methanex.com/role/FinancialInstrumentsCarryingValuesOfFinancialInstrumentsDetails
1077 Disclosure Of Financial Assets And Liabilities [Table] Table

*

*

mx:DisclosureOfFinancialAssetsAndLiabilitiesTableTable
1078 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1079 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1080 Long-term debt excluding deferred financing fees Member ifrs-full:LongtermBorrowingsMember
1081 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1082 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1083 Level 2 Member ifrs-full:Level2OfFairValueHierarchyMember
1084 Disclosure of fair value measurement of liabilities [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesLineItems
1085 Carrying value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1086 Fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
1087 2455402 - Disclosure - Financial risk management - Interest rate risk (Details) Network

*

*

http://methanex.com/role/FinancialRiskManagementInterestRateRiskDetails
1088 Disclosure of financial instruments by type of interest rate [table] Table

*

*

ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable
1089 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1090 Risks [member] Member ifrs-full:TypesOfRisksMember
1091 Interest rate risk Member ifrs-full:InterestRateRiskMember
1092 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1093 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
1094 Unsecured notes Member mx:UnsecuredDebt1Member
1095 Egypt limited recourse debt facilities Member mx:EgyptLimitedRecourseDebtFacilitiesMember
1096 Other limited recourse debt facilities Member mx:OtherLimitedRecourseDebtFacilitiesMember
1097 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
1098 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
1099 Fixed interest rate Member ifrs-full:FixedInterestRateMember
1100 Variable interest rate Member ifrs-full:FloatingInterestRateMember
1101 Disclosure of financial instruments by type of interest rate [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems
1102 Long-term debt Concept (Monetary) As Of ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic
1103 Reasonably possible change in risk variable, percent Concept (Percent) For Period mx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent
1104 Reasonably possible change in risk variable, impact on debt Concept (Monetary) As Of Credit mx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDebt
1105 Reasonably possible change in risk variable, impact on pre-tax earnings Concept (Monetary) As Of Credit mx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnPreTaxEarnings
1106 2455403 - Disclosure - Financial risk management - Foreign currency risk (Details) Network

*

*

http://methanex.com/role/FinancialRiskManagementForeignCurrencyRiskDetails
1107 Disclosure of financial instruments by type of interest rate [table] Table

*

*

ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable
1108 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1109 Risks [member] Member ifrs-full:TypesOfRisksMember
1110 Currency risk Member ifrs-full:CurrencyRiskMember
1111 Disclosure of financial instruments by type of interest rate [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems
1112 Net working capital asset Concept (Monetary) As Of ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic
1113 Reasonably possible change in risk variable, percent Concept (Percent) For Period mx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent
1114 Impact on value of net working capital Concept (Monetary) For Period Credit mx:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnEquity
1115 2455404 - Disclosure - Financial risk management - Liquidity risks (Details) Network

*

*

http://methanex.com/role/FinancialRiskManagementLiquidityRisksDetails
1116 Disclosure of financial liabilities [table] Table

*

*

ifrs-full:DisclosureOfFinancialLiabilitiesTable
1117 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
1118 Risks [member] Member ifrs-full:TypesOfRisksMember
1119 Liquidity risk Member ifrs-full:LiquidityRiskMember
1120 Maturity [axis] Axis ifrs-full:MaturityAxis
1121 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1122 1 year or less Member ifrs-full:NotLaterThanOneYearMember
1123 1-3 years Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
1124 3-5 years Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
1125 More than 5 years Member ifrs-full:LaterThanFiveYearsMember
1126 Disclosure of financial liabilities [line items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1127 Carrying amount Abstract mx:FinancialLiabilitiesCarryingAmountAbstract
1128 Trade and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayables
1129 Finance lease obligations Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
1130 Long-term debt Concept (Monetary) As Of Credit ifrs-full:Borrowings
1131 Cash flow hedges Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1132 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1133 Contractual cash flows Abstract mx:FinancialLiabilitiesContractualCashFlowsAbstract
1134 Trade and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows
1135 Finance lease obligations Concept (Monetary) As Of Credit ifrs-full:GrossFinanceLeaseObligations
1136 Long-term debt Concept (Monetary) As Of Credit ifrs-full:BankBorrowingsUndiscountedCashFlows
1137 Cash flow hedges Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
1138 Financial liabilities Concept (Monetary) As Of Credit mx:FinancialLiabilitiesUndiscountedCashFlows
1139 2458402 - Disclosure - Retirement plans - Defined benefit pension plans (Details) Network

*

*

http://methanex.com/role/RetirementPlansDefinedBenefitPensionPlansDetails
1140 Disclosure of net defined benefit liability (asset) [table] Table

*

*

ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1141 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1142 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
1143 Accrued benefit obligations Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
1144 Fair values of plan assets Member ifrs-full:PlanAssetsMember
1145 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1146 Balance, beginning of year Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1147 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1148 Past service cost Concept (Monetary) For Period Credit ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1149 Interest cost on accrued benefit obligations / (income) on assets Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1150 Contributions Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
1151 Benefit payments Concept (Monetary) For Period Debit ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1152 Actuarial (gain) loss Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
1153 Return (loss) on plan assets Concept (Monetary) For Period Debit ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
1154 Foreign exchange gain (loss) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1155 Balance, end of year Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1156 Unfunded status Concept (Monetary) As Of Debit ifrs-full:SurplusDeficitInPlan
1157 Minimum funding requirement Concept (Monetary) As Of Debit mx:DefinedBenefitPlanMinimumFundingRequirement
1158 2458403 - Disclosure - Retirement plans - Additional information (Details) Network

*

*

http://methanex.com/role/RetirementPlansAdditionalInformationDetails
1159 Disclosure of net defined benefit liability (asset) [table] Table

*

*

ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1160 Retirement Plan Funding Status1 [Axis] Axis mx:RetirementPlanFundingStatus1Axis
1161 Retirement Plan Funding Status1 [Domain] Member mx:RetirementPlanFundingStatus1Domain
1162 Unfunded Member mx:UnfundedPlan1Member
1163 Funded Member mx:FundedPlan1Member
1164 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1165 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1166 Foreign Member ifrs-full:ForeignDefinedBenefitPlansMember
1167 Domestic Member ifrs-full:DomesticDefinedBenefitPlansMember
1168 Retirement Plan Sponsor Location1 [Axis] Axis mx:RetirementPlanSponsorLocation1Axis
1169 Retirement Plan Sponsor Location1 [Domain] Member mx:RetirementPlanSponsorLocation1Domain
1170 Chile Member mx:CHILEMember
1171 Europe Member mx:EUROPEMember
1172 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1173 Retirement obligation (asset) Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1174 Estimate of contributions expected to be paid to plan for 2019 Concept (Monetary) For Period Credit ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1175 Weighted average duration of defined benefit obligation Concept (Decimal) For Period ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
1176 2458404 - Disclosure - Retirement plans - Expense recognized in income statement (Details) Network

*

*

http://methanex.com/role/RetirementPlansExpenseRecognizedInIncomeStatementDetails
1177 Implied Table Table

*

*

implied:Table
1178 Employee Benefits [Abstract] Abstract mx:EmployeeBenefitsAbstract
1179 Net defined benefit pension plan expense: Abstract mx:NetDefinedBenefitPensionPlanExpenseAbstract
1180 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1181 Past service cost Concept (Monetary) For Period Credit ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1182 Net interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1183 Net defined benefit pension plan expense Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1184 2458405 - Disclosure - Retirement plans - Expense recognized in other comprehensive income (Details) Network

*

*

http://methanex.com/role/RetirementPlansExpenseRecognizedInOtherComprehensiveIncomeDetails
1185 Implied Table Table

*

*

implied:Table
1186 Employee Benefits [Abstract] Abstract mx:EmployeeBenefitsAbstract
1187 Actuarial gain (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1188 Minimum funding requirement Concept (Monetary) For Period Debit mx:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlansMinimumFundingRequirement
1189 2458406 - Disclosure - Retirement plans - Actuarial assumptions and sensitivity analysis (Details) Network

*

*

http://methanex.com/role/RetirementPlansActuarialAssumptionsAndSensitivityAnalysisDetails
1190 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

*

*

ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
1191 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
1192 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
1193 Discount rate Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1194 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
1195 Discount rates Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
1196 Percentage of reasonably possible decrease in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
1197 Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
1198 2458407 - Disclosure - Retirement plans - Asset allocation (Details) Network

*

*

http://methanex.com/role/RetirementPlansAssetAllocationDetails
1199 Implied Table Table

*

*

implied:Table
1200 Employee Benefits [Abstract] Abstract mx:EmployeeBenefitsAbstract
1201 Equity securities Concept (Percent) As Of mx:EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
1202 Debt securities Concept (Percent) As Of mx:DebtInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
1203 Cash and other short-term securities Concept (Percent) As Of mx:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
1204 Total Concept (Percent) As Of mx:PlanAssetsAtFairValueAllocationPercentage
1205 2458408 - Disclosure - Retirement plans - Defined contribution pension plans (Details) Network

*

*

http://methanex.com/role/RetirementPlansDefinedContributionPensionPlansDetails
1206 Implied Table Table

*

*

implied:Table
1207 Employee Benefits [Abstract] Abstract mx:EmployeeBenefitsAbstract
1208 Defined contribution pension plans Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
1209 2461402 - Disclosure - Commitments and contingencies - Minimum purchase contract commitment (Details) Network

*

*

http://methanex.com/role/CommitmentsAndContingenciesMinimumPurchaseContractCommitmentDetails
1210 Disclosure of contingent liabilities [table] Table

*

*

ifrs-full:DisclosureOfContingentLiabilitiesTable
1211 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
1212 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
1213 Take-or-pay purchase contracts Member mx:PurchaseCommitment1Member
1214 Maturity [axis] Axis ifrs-full:MaturityAxis
1215 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1216 2019 Member ifrs-full:NotLaterThanOneYearMember
1217 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1218 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1219 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1220 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1221 Thereafter Member ifrs-full:LaterThanFiveYearsMember
1222 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1223 Minimum estimated commitment Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentLiabilities
1224 2461403 - Disclosure - Commitments and contingencies - Operating lease payments (Details) Network

*

*

http://methanex.com/role/CommitmentsAndContingenciesOperatingLeasePaymentsDetails
1225 Disclosure of finance lease and operating lease by lessee [table] Table

*

*

ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1226 Maturity [axis] Axis ifrs-full:MaturityAxis
1227 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1228 2019 Member ifrs-full:NotLaterThanOneYearMember
1229 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1230 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1231 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1232 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1233 Thereafter Member ifrs-full:LaterThanFiveYearsMember
1234 Disclosure of finance lease and operating lease by lessee [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1235 Future minimum lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1236 2461404 - Disclosure - Commitments and contingencies - Narrative (Details) Network

*

*

http://methanex.com/role/CommitmentsAndContingenciesNarrativeDetails
1237 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1238 Arrangements involving legal form of lease [axis] Axis ifrs-full:ArrangementsInvolvingLegalFormOfLeaseAxis
1239 Arrangements involving legal form of lease [member] Member ifrs-full:ArrangementsInvolvingLegalFormOfLeaseMember
1240 Delivery of vessels currently under construction Member mx:DeliveryOfVesselsCurrentlyUnderConstructionMember
1241 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1242 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1243 Atlas Joint Venture Member mx:AtlasMethanolCompanyUnlimitedMember
1244 Atlas Plant and Egypt Plant Member mx:AtlasPlantAndEgyptPlantMember
1245 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1246 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1247 Trinidad Member mx:TRINIDADANDTOBAGOMember
1248 Egypt Member mx:EGYPTMember
1249 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
1250 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
1251 Purchase commitment of methanol supply Member mx:PurchaseCommitmentOfMethanolSupplyMember
1252 Maturity [axis] Axis ifrs-full:MaturityAxis
1253 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1254 Within one year Member ifrs-full:NotLaterThanOneYearMember
1255 Thereafter Member ifrs-full:LaterThanOneYearMember
1256 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1257 Number of time charter agreements Concept (Integer) As Of mx:NumberOfCharterAgreements
1258 Future minimum lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1259 Lease term Concept (xbrli:durationItemType) For Period mx:LeaseTerm
1260 Percentage of marketing rights in production Concept (Percent) For Period mx:ProportionOfMarketingRightsInterestInProduction
1261 Percentage of ownership interest in associates Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1262 Purchase commitments (in tonnes) Concept (num:massItemType) For Period mx:ContingentLiabilitiesWithAssociatesMinimumMassRequired
1263 2464402 - Disclosure - Related parties - Subsidiaries and joint ventures (Details) Network

*

*

http://methanex.com/role/RelatedPartiesSubsidiariesAndJointVenturesDetails
1264 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1265 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1266 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1267 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
1268 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1269 Interest % Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1270 2464402 - Disclosure - Related parties - Subsidiaries and joint ventures (Details) Network

*

*

http://methanex.com/role/RelatedPartiesSubsidiariesAndJointVenturesDetails
1271 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1272 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1273 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1274 Methanex Asia Pacific Limited Member mx:MethanexAsiaPacificLimitedMember
1275 Methanex Europe NV Member mx:MethanexEuropeNVMember
1276 Methanex Methanol Company, LLC Member mx:MethanexMethanolCompanyLLCMember
1277 Egyptian Methanex Methanol Company S.A.E. (Methanex Egypt) Member mx:EgyptianMethanexMethanolCompanyS.A.E.MethanexEgyptMember
1278 Methanex Chile S.A. Member mx:MethanexChileS.A.Member
1279 Methanex New Zealand Limited Member mx:MethanexNewZealandLimitedMember
1280 Methanex Trinidad (Titan) Unlimited Member mx:MethanexTrinidadTitanUnlimitedMember
1281 Methanex U.S.A. LLC Member mx:MethanexU.S.A.LLCMember
1282 Methanex Louisiana LLC Member mx:MethanexLouisianaLLCMember
1283 Waterfront Shipping Company Limited Member mx:WaterfrontShippingCompanyLimitedMember
1284 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1285 Interest % Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1286 2464403 - Disclosure - Related parties - Narrative (Details) Network

*

*

http://methanex.com/role/RelatedPartiesNarrativeDetails
1287 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1288 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1289 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1290 Associates Member ifrs-full:AssociatesMember
1291 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1292 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1293 Atlas Methanol Company Unlimited Member mx:AtlasMethanolCompanyUnlimitedMember
1294 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1295 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1296 Percentage of marketing rights in production Concept (Percent) For Period mx:ProportionOfMarketingRightsInterestInProduction
1297 Receivables from related party transactions Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
1298 Payables from related party transactions Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
1299 Loans outstanding from related party transactions Concept (Monetary) As Of Debit ifrs-full:NoncurrentReceivablesDueFromRelatedParties
1300 2464404 - Disclosure - Related parties - Remuneration (Details) Network

*

*

http://methanex.com/role/RelatedPartiesRemunerationDetails
1301 Implied Table Table

*

*

implied:Table
1302 Related Party [Abstract] Abstract mx:RelatedPartyAbstract
1303 Short-term employee benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1304 Post-employment benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
1305 Other long-term employee benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationOtherLongtermBenefits
1306 Share-based compensation expense (recovery) Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1307 Total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1308 2467402 - Disclosure - Non-controlling interests - Financial position (Details) Network

*

*

http://methanex.com/role/NonControllingInterestsFinancialPositionDetails
1309 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1310 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1311 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1312 Total Member ifrs-full:SubsidiariesMember
1313 Methanex Egypt Member mx:EgyptianMethanexMethanolCompanyS.A.E.MethanexEgyptMember
1314 Other Member mx:OtherSubsidiariesMember
1315 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1316 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1317 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1318 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1319 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1320 Net assets Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
1321 Carrying amount of Methanex non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1322 2467403 - Disclosure - Non-controlling interests - Income statement (Details) Network

*

*

http://methanex.com/role/NonControllingInterestsIncomeStatementDetails
1323 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1324 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1325 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1326 Methanex Egypt Member mx:EgyptianMethanexMethanolCompanyS.A.E.MethanexEgyptMember
1327 Other Member mx:OtherSubsidiariesMember
1328 Total Member ifrs-full:SubsidiariesMember
1329 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1330 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1331 Net income Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1332 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
1333 Net income attributable to Methanex non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
1334 Total comprehensive income attributable to Methanex non-controlling interests Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeAttributableToNoncontrollingInterests
1335 Equity contributions by non-controlling interests Concept (Monetary) For Period Debit ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests
1336 Distributions paid and accrued to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterests
1337 2467404 - Disclosure - Non-controlling interests - Cash flows (Details) Network

*

*

http://methanex.com/role/NonControllingInterestsCashFlowsDetails
1338 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1339 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1340 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1341 Methanex Egypt Member mx:EgyptianMethanexMethanolCompanyS.A.E.MethanexEgyptMember
1342 Other Member mx:OtherSubsidiariesMember
1343 Total Member ifrs-full:SubsidiariesMember
1344 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1345 Cash flows from (used in) operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
1346 Cash flows from (used in) financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
1347 Cash flows from (used in) investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities

*

*