TASEKO MINES LTD (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

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1 1001 - Document - Document and Entity Information Network

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4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
14 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
15 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
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18 Operating expenses from mining business [abstract] Abstract tgb:OperatingExpensesFromMiningBusinessAbstract
19 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
20 Cost of sales Abstract tgb:CostOfSalesAbstract
21 Production costs Concept (Monetary) For Period Debit tgb:ProductionCosts1
22 Depletion and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
23 Earnings from mining operations Concept (Monetary) For Period Credit tgb:EarningsFromMiningOperations
24 General and administrative Concept (Monetary) For Period Debit ifrs-full:GeneralAndAdministrativeExpense
25 Share-based compensation recovery (expense) Concept (Monetary) For Period Debit tgb:ShareBasedCompensationExpense
26 Exploration and evaluation Concept (Monetary) For Period Debit ifrs-full:ExpenseArisingFromExplorationForAndEvaluationOfMineralResources
27 Loss on derivatives Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
28 Other income (expense) Concept (Monetary) For Period Credit tgb:OtherIncomeAndExpense
29 Income before financing costs and income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
30 Finance expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
31 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
32 Foreign exchange gain (loss) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
33 Income (loss) before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
34 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
35 Net earnings Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
36 Other comprehensive income (loss) Abstract ifrs-full:OtherComprehensiveIncomeAbstract
37 Unrealized gain (loss) on financial assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax
38 Foreign currency translation reserve Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
39 Total other comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
40 Total comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
41 Earnings (loss) per share Abstract ifrs-full:EarningsPerShareAbstract
42 Basic Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
43 Diluted Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
44 Weighted average shares outstanding (thousands) Abstract ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
45 Basic Concept (Shares) For Period ifrs-full:WeightedAverageShares
46 Diluted Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
47 1004 - Statement - Consolidated Statements of Cash Flows Network

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49 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
50 Operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
51 Net income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
52 Adjustments for: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
53 Depletion and amortization Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
54 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
55 Share-based compensation expense (recovery) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
56 Loss on derivatives Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
57 Finance expenses, net Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForFinanceCosts
58 Unrealized foreign exchange (gain) loss Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
59 Write-down of mine equipment Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
60 Deferred revenue deposit Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
61 Amortization of deferred revenue Concept (Monetary) For Period Credit tgb:AdjustmentsForAmortizationOfDeferredRevenue
62 Deferred electricity repayments Concept (Monetary) For Period Debit tgb:AdjustmentsForDeferredElectricityPaymentsRepayments
63 Other operating activities Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsToReconcileProfitLoss
64 Net change in non-cash working capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
65 Cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
66 Investing activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
67 Purchase of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
68 Purchase of copper put options Concept (Monetary) For Period Credit ifrs-full:CashPaymentsForFutureContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsInvestingActivities
69 Proceeds from copper put options Concept (Monetary) For Period Debit ifrs-full:CashReceiptsFromFutureContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsInvestingActivities
70 Investment in other financial assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities
71 Other investing activities Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
72 Cash used for investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
73 Financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
74 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
75 Proceeds from equipment loan, net Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
76 Repayment of capital leases and equipment loans Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
77 Proceeds on exercise of options and warrants Concept (Monetary) For Period Debit tgb:ProceedsFromExerciseOfOptionsAndWarrants
78 Net proceeds from issuance of senior secured notes Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures
79 Repayment of senior notes Concept (Monetary) For Period Debit tgb:RepaymentsOfSeniorNotes
80 Repayment of senior secured credit facility Concept (Monetary) For Period Credit tgb:RepaymentsOfSeniorSecuredCreditFacility
81 Settlement of copper call option Concept (Monetary) For Period Credit tgb:SettlementOfCopperCallOptionClassifiedAsFinancingActivities
82 Cash used for financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
83 Effect of exchange rate changes on cash and equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
84 Decrease in cash and equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
85 Cash and equivalents, beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
86 Cash and equivalents, end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
87 1005 - Statement - Consolidated Balance Sheets Network

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89 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
90 ASSETS Abstract ifrs-full:AssetsAbstract
91 Current assets Abstract ifrs-full:CurrentAssetsAbstract
92 Cash and equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
93 Accounts receivable Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
94 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
95 Other financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
96 Prepaids Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
97 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
98 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
99 Other financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
100 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
101 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
102 LIABILITIES Abstract ifrs-full:LiabilitiesAbstract
103 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
104 Accounts payable and other liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
105 Current portion of long-term debt Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
106 Current portion of deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
107 Interest payable on senior secured notes Concept (Monetary) As Of Credit ifrs-full:CurrentInterestPayable
108 Current income tax payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
109 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
110 Long-term debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
111 Provision for environmental rehabilitation ("PER") Concept (Monetary) As Of Credit ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCosts
112 Deferred and other tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
113 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
114 Other financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
115 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
116 EQUITY Abstract ifrs-full:EquityAbstract
117 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
118 Contributed surplus Concept (Monetary) As Of Credit tgb:ContributedSurplus
119 Accumulated other comprehensive income ("AOCI") Concept (Monetary) As Of Credit ifrs-full:AccumulatedOtherComprehensiveIncome
120 Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
121 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
122 Total equity and liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
123 1006 - Statement - Consolidated Statements of Changes in Equity Network

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124 Statement [table] Table

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125 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
126 Equity [member] Member ifrs-full:EquityMember
127 Share capital [member] Member ifrs-full:IssuedCapitalMember
128 Share premium [member] Member ifrs-full:SharePremiumMember
129 AOCI [member] Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
130 Deficit [member] Member ifrs-full:RetainedEarningsMember
131 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
132 Currently stated [member] Member ifrs-full:RestatedMember
133 Adjustment on initial application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
134 Adjusted Balance [member] Member tgb:AdjustedBalanceMember
135 Statement [LineItems] LineItems tgb:StatementLineItems
136 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
137 Issuance of warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
138 Share-based compensation Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
139 Exercise of options and warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
140 Settlement of performance share units Concept (Monetary) For Period Debit tgb:IncreaseDecreaseThroughSettlementOfPerformanceShareUnits
141 Total comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
142 Ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
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151 1009 - Disclosure - Interest in Gibraltar Joint Venture Network

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276 Text block [abstract] Abstract tgb:TextBlockAbstract
277 Summary of Cost of Sales Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailedInformationAboutCostOfSalesExplanatory
278 1037 - Disclosure - Compensation Expense (Tables) Network

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279 Implied Table Table

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280 Text block [abstract] Abstract tgb:TextBlockAbstract
281 Summary of Compensation Expense Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailedInformationAboutCompensationExpenseExplanatory
282 1038 - Disclosure - Derivative Instruments (Tables) Network

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283 Implied Table Table

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284 Text block [abstract] Abstract tgb:TextBlockAbstract
285 Summary of Losses Associated with Derivative Instruments Concept (Text Block (HTML)) For Period tgb:DisclosureOfGainsLossesOnDerivativeFinancialInstrumentsExplanatory
286 1039 - Disclosure - Other Expenses (Income) (Tables) Network

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287 Implied Table Table

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288 Text block [abstract] Abstract tgb:TextBlockAbstract
289 Summary of Other Expenses (Income) Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailsOtherExpenseIncomeExplanatory
290 1040 - Disclosure - Finance Expenses (Tables) Network

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291 Implied Table Table

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292 Text block [abstract] Abstract tgb:TextBlockAbstract
293 Summary of Finance Expenses Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailedInformationAboutFinanceExpenseExplanatory
294 1041 - Disclosure - Income Tax (Tables) Network

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295 Implied Table Table

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296 Text block [abstract] Abstract tgb:TextBlockAbstract
297 Summary of Income Tax Expense (Recovery) Concept (Text Block (HTML)) For Period tgb:DisclosureOfComponentsOfIncomeTaxExplanatory
298 Summary of Effective Tax Rate Reconciliation Concept (Text Block (HTML)) For Period tgb:DisclosureOfEffectiveIncomeTaxRateReconciliationExplanatory
299 Summary of Deferred Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
300 Summary of Unrecognized Deferred Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
301 1042 - Disclosure - Accounts Receivable (Tables) Network

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302 Implied Table Table

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303 Text block [abstract] Abstract tgb:TextBlockAbstract
304 Summary of Accounts Receivable Concept (Text Block (HTML)) For Period tgb:DisclosureOfReceivablesExplanatory
305 1043 - Disclosure - Inventories (Tables) Network

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306 Implied Table Table

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307 Text block [abstract] Abstract tgb:TextBlockAbstract
308 Schedule of Inventories Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailedInformationAboutInventoriesExplanatory
309 1044 - Disclosure - Other Financial Assets (Tables) Network

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310 Implied Table Table

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311 Text block [abstract] Abstract tgb:TextBlockAbstract
312 Summary of Other Financial Assets Concept (Text Block (HTML)) For Period tgb:DisclosureOfOtherFinancialAssetsExplanatory
313 1045 - Disclosure - Property, Plant & Equipment (Tables) Network

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314 Implied Table Table

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315 Text block [abstract] Abstract tgb:TextBlockAbstract
316 Summary of Property, Plant & Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
317 1046 - Disclosure - Accounts Payable and Accrued Liabilities (Tables) Network

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318 Implied Table Table

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319 Text block [abstract] Abstract tgb:TextBlockAbstract
320 Summary of Accounts Payable and Accrued Liabilities Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailedInformationAboutAccountsPayableAndAccruedLiabilitiesExplanatory
321 1047 - Disclosure - Debt (Tables) Network

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322 Implied Table Table

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323 Text block [abstract] Abstract tgb:TextBlockAbstract
324 Summary of Debt Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
325 1048 - Disclosure - Deferred Revenue (Tables) Network

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326 Implied Table Table

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327 Text block [abstract] Abstract tgb:TextBlockAbstract
328 Summary of Change in Deferred Revenue Concept (Text Block (HTML)) For Period tgb:DisclosureOfChangesInDeferredIncomeExplanatory
329 Summary of Deferred Revenue Concept (Text Block (HTML)) For Period tgb:DisclosureOfDeferredRevenueExplanatory
330 1049 - Disclosure - Provision For Environmental Rehabilitation (Tables) Network

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331 Implied Table Table

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332 Text block [abstract] Abstract tgb:TextBlockAbstract
333 Summary of Provision for Environmental Rehabilitation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherProvisionsExplanatory
334 1050 - Disclosure - Equity (Tables) Network

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335 Implied Table Table

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336 Text block [abstract] Abstract tgb:TextBlockAbstract
337 Summary of Equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
338 1051 - Disclosure - Share-Based Compensation (Tables) Network

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339 Implied Table Table

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340 Text block [abstract] Abstract tgb:TextBlockAbstract
341 Summary of Options and Average Price Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
342 Summary of Options and Average Life Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory
343 Summary of Inputs Used in Measurement of Fair Value at Grant Date Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory
344 Summary of DSUs and PSUs issued and outstanding Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory
345 Summary of Share Based Compensation Expense (Recovery) Concept (Text Block (HTML)) For Period tgb:DisclosureOfShareBasedCompensationExpenseExplanatory
346 1052 - Disclosure - Commitments and Contingencies (Tables) Network

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347 Implied Table Table

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348 Text block [abstract] Abstract tgb:TextBlockAbstract
349 Summary of Future Minimum Payments of Commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsExplanatory
350 1053 - Disclosure - Supplementary Cash Flow Information (Tables) Network

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351 Implied Table Table

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352 Text block [abstract] Abstract tgb:TextBlockAbstract
353 Summary of Supplemental Cash Flow Information Concept (Text Block (HTML)) For Period tgb:DisclosureOfSupplementalCashFlowInformationExplanatory
354 1054 - Disclosure - Financial Risk Management (Tables) Network

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355 Implied Table Table

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356 Text block [abstract] Abstract tgb:TextBlockAbstract
357 Exposure to Commodity Price Risk Concept (Text Block (HTML)) For Period tgb:DisclosureOfPretaxEarningsAndEquityForChangesInCommodityPricesExplanatory
358 Summary of Impact on Earnings After Tax and Equity Concept (Text Block (HTML)) For Period tgb:DisclosureOfInterestRateSensitivityAnalysisExplanatory
359 Schedule of Changes in Assets and Liabilities on Basis of Strengthening CAD Against USD Concept (Text Block (HTML)) For Period tgb:DisclosureOfIncreaseDecreaseInAssetsAndLiabilitiesOnBasisOfStrengtheningOfMajorCurrenciesAgainstFunctionalCurrencyExplanatory
360 Summary of Fair Value Measurement of Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueMeasurementOfAssetsExplanatory
361 Summary of Capital Management Concept (Text Block (HTML)) For Period tgb:DisclosureOfDetailedInformationAboutCapitalStructureExplanatory
362 1055 - Disclosure - Related Parties (Tables) Network

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363 Implied Table Table

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364 Text block [abstract] Abstract tgb:TextBlockAbstract
365 Summary of Ownership Interest of Subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
366 Summary of Compensation for Key Management Personnel Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory
367 1056 - Disclosure - Reporting Entity - Additional Information (Detail) Network

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368 Disclosure of reporting entity [table] Table

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369 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
370 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
371 Gibraltar Joint Venture [member] Member tgb:GibraltarJointVentureMember
372 Disclosure of reporting entity [line items] LineItems tgb:DisclosureOfReportingEntityLineItems
373 Ownership interest in joint venture Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
374 1057 - Disclosure - Basis of Preparation - Schedule of Depreciation Rates of Major Asset Categories (Detail) Network

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375 Disclosure of detailed information about property, plant and equipment [table] Table

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376 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
377 Plant and equipment [Member] Member ifrs-full:PropertyPlantAndEquipmentMember
378 Land [member] Member ifrs-full:LandMember
379 Buildings [member] Member ifrs-full:BuildingsMember
380 Plant and equipment [member] Member tgb:PlantAndEquipmentMember
381 Mineral properties [member] Member ifrs-full:MiningPropertyMember
382 Light vehicles and other mobile equipment [member] Member tgb:LightVehiclesAndOtherMobileEquipmentMember
383 Furniture computer and office equipment [member] Member tgb:FurnitureComputerAndOfficeEquipmentMember
384 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
385 Depreciation rates of major asset categories Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesInvestmentPropertyCostModel
386 1058 - Disclosure - Basis of Preparation - Summary of Impact of Transition to IFRS 15 on Deficit (Detail) Network

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387 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

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388 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
389 Currently stated [member] Member ifrs-full:RestatedMember
390 Adjustment on initial application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
391 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
392 Deferred revenue adjustment, net of tax (Note 18) Concept (Monetary) For Period Credit tgb:AdjustmentsForDeferredRevenueNetOfTax
393 Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
394 1059 - Disclosure - Basis of Preparation - Summary of Impact of Adoption of IFRS 15 on Companys Consolidated Balance Sheet (Detail) Network

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395 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

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396 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
397 Currently stated [member] Member ifrs-full:RestatedMember
398 Adjustment on initial application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
399 Previously stated [member] Member ifrs-full:PreviouslyStatedMember
400 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
401 Current portion of deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
402 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
403 Deferred tax liability Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
404 Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
405 1060 - Disclosure - Basis of Preparation - Summary of Impact of Adoption of IFRS 15 on Companys Consolidated Statement of Comprehensive Income (Loss) (Detail) Network

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406 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

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407 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
408 Currently stated [member] Member ifrs-full:RestatedMember
409 Adjustment on initial application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
410 Previously stated [member] Member ifrs-full:PreviouslyStatedMember
411 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
412 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
413 Finance expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
414 Income tax recovery (expense) Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
415 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
416 Total comprehensive loss Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
417 1061 - Disclosure - Basis of Preparation - Summary of Original Measurement Categories under IAS 39 and New Measurement Categories under IFRS 9 for Each Class of Company's Financial Assets (Detail) Network

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418 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

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419 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
420 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
421 Cash and cash equivalent [member] Member tgb:CashAndCashEquivalentMember
422 Accounts Receivable [member] Member tgb:AccountsReceivableMember
423 Settlement receivables [member] Member tgb:SettlementReceivablesMember
424 Copper put option contracts [member] Member tgb:CopperPutOptionContractsMember
425 Marketable securities [member] Member tgb:MarketableSecuritiesMember
426 Investment in subscription receipts [member] Member tgb:InvestmentInSubscriptionReceiptsMember
427 Reclamation deposits [member] Member tgb:ReclamationDepositsMember
428 Restricted cash [member] Member tgb:RestrictedCashMember
429 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
430 Original Classification under IAS 39 Concept (Text/String) For Period tgb:DescriptionOfOriginalMeasurementCategoriesUnderIAS39
431 New Classification under IFRS 9 Concept (Text/String) For Period tgb:DescriptionOfNewMeasurementCategoriesUnderIFRS09
432 1062 - Disclosure - Interest in Gibraltar Joint Venture - Additional Information (Detail) Network

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433 Disclosure of interest in joint venture [table] Table

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434 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
435 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
436 Gibraltar Joint Venture [member] Member tgb:GibraltarJointVentureMember
437 Legal Entity [Axis] Axis dei:LegalEntityAxis
438 Entity [Domain] Member dei:EntityDomain
439 Cariboo Copper Corp [member] Member tgb:CaribooCopperCorpMember
440 Disclosure of interest in joint venture [line items] LineItems tgb:DisclosureOfInterestInJointVentureLineItems
441 Ownership interest in joint venture Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
442 Amount contributed for purchase of remaining proportion of ownership interest in joint venture Concept (Monetary) As Of Credit tgb:AmountContributedForPurchaseOfRemainingProportionOfOwnershipInterestInJointVenture
443 Remaining portion of ownership interest in joint venture Concept (Percent) For Period tgb:RemainingProportionOfOwnershipInterestInJointVenture
444 1063 - Disclosure - Interest in Gibraltar Joint Venture - Summary of Joint Venture Financial Information (Detail) Network

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445 Disclosure of joint ventures [table] Table

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446 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
447 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
448 Gibraltar Joint Venture [member] Member tgb:GibraltarJointVentureMember
449 Disclosure of joint ventures [line items] LineItems ifrs-full:DisclosureOfJointVenturesLineItems
450 Cash and equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
451 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
452 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
453 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
454 Accounts payable and accrued liabilities Concept (Monetary) As Of Credit tgb:AccountsPayableAndAccruedLiabilities
455 Other current financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
456 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
457 Long-term debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
458 Provision for environmental rehabilitation Concept (Monetary) As Of Credit ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCosts
459 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
460 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
461 Production costs Concept (Monetary) For Period Debit tgb:ProductionCosts1
462 Depletion and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
463 Other operating expense Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
464 Write-down of mine equipment Concept (Monetary) For Period ifrs-full:WritedownsReversalsOfPropertyPlantAndEquipment
465 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
466 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
467 Foreign exchange gain (loss) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
468 Net earnings Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
469 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
470 Comprehensive income for joint arrangement Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
471 1064 - Disclosure - Revenue - Summary of Revenue (Detail) Network

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472 Implied Table Table

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473 Disclosure Of Revenues [abstract] Abstract tgb:DisclosureOfRevenuesAbstract
474 Revenue from sale of copper Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfCopper
475 Revenue from sale of Molybdenum concentrate Concept (Monetary) For Period Credit tgb:RevenueFromSaleOfMolybdenumConcentrate
476 Revenue from sale of Silver Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfSilver
477 Revenue from sale of settlement receivables Concept (Monetary) For Period Credit tgb:RevenueFromSaleOfSettlementReceivables
478 Revenue from sale of goods Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoods
479 Less: Treatment and refining costs Concept (Monetary) For Period Debit tgb:TreatmentAndRefiningCosts
480 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
481 1065 - Disclosure - Cost of Sales - Summary of Cost of Sales (Detail) Network

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482 Implied Table Table

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483 Disclosure of cost of sales [abstract] Abstract tgb:DisclosureOfCostOfSalesAbstract
484 Site operating costs Concept (Monetary) For Period Debit tgb:DirectMiningCosts
485 Transportation costs Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
486 Insurance recovered Concept (Monetary) For Period Credit tgb:InsuranceClaimsRecovered
487 Changes in inventories of finished goods Concept (Monetary) For Period Debit tgb:ChangesInInventoriesOfFinishedGoods
488 Changes in inventories of ore stockpiles Concept (Monetary) For Period Debit tgb:ChangesInInventoriesOfFinishedGoodsAndOreStockpiles
489 Production costs Concept (Monetary) For Period Debit tgb:ProductionCosts1
490 Depletion and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
491 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
492 1066 - Disclosure - Cost Of Sales - Additional Information (Detail) Network

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493 Disclosure Of Cost Of Sales [table] Table

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494 Insurance contracts [axis] Axis ifrs-full:InsuranceContractsAxis
495 Insurance contracts [member] Member ifrs-full:InsuranceContractsMember2017
496 Cariboo Region Wildfires [member] Member tgb:CaribooRegionWildfiresMember
497 Disclosure of cost of sales [line items] LineItems tgb:DisclosureOfCostOfSalesLineItems
498 Insurance recovered Concept (Monetary) For Period Credit tgb:InsuranceClaimsRecovered
499 Percentage of insurance recovered Concept (Percent) For Period tgb:PercentageOfInsuranceRecovered
500 1067 - Disclosure - Compensation Expense - Summary of Compensation Expense (Detail) Network

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501 Implied Table Table

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502 Disclosure of compensation expense [abstract] Abstract tgb:DisclosureOfCompensationExpenseAbstract
503 Wages, salaries and benefits Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
504 Post-employment benefits Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
505 Share-based compensation (recovery) expense Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
506 Compensation expense Concept (Monetary) For Period Debit tgb:EmployeeSalariesAndBenefitsExpense
507 1068 - Disclosure - Derivative Instruments - Additional Information (Detail) Network

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508 Disclosure of detailed information about financial instruments [table] Table

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509 Range [axis] Axis ifrs-full:RangeAxis
510 Ranges [member] Member ifrs-full:RangesMember
511 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
512 Top of range [member] Member ifrs-full:TopOfRangeMember
513 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
514 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
515 Option contract [member] Member ifrs-full:OptionContractMember
516 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
517 Number of pounds of copper for which put options were purchased Concept (num:massItemType) For Period tgb:NumberOfPoundsOfCopper
518 Maturity date Concept (Text/String) For Period tgb:DerivativeMaturityDate
519 Strike price Concept (Decimal) As Of ifrs-full:AveragePriceOfHedgingInstrument
520 Purchase of copper put options Concept (Monetary) For Period Credit ifrs-full:CashPaymentsForFutureContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsInvestingActivities
521 Proceeds from copper put options Concept (Monetary) For Period Debit ifrs-full:CashReceiptsFromFutureContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsInvestingActivities
522 1069 - Disclosure - Derivative Instruments - Summary of Losses Associated with Derivative Instruments (Detail) Network

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523 Disclosure of detailed information about financial instruments [table] Table

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524 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
525 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
526 Copper put option contracts [member] Member tgb:CopperPutOptionContractsMember
527 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
528 Realized loss on copper put options Concept (Monetary) For Period Credit tgb:RealizedGainsLossesOnChangeInFairValueOfDerivatives
529 Unrealized (gain) loss on copper put options Concept (Monetary) For Period Credit tgb:UnrealizedGainsLossesOnChangeInFairValueOfDerivatives
530 Change in fair value of copper call option Concept (Monetary) For Period Credit tgb:ChangesInTheFairValueOfDerivativeFinancialInstruments
531 Losses associated with derivatives Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
532 1070 - Disclosure - Other Expenses (Income) - Summary of Other Expenses (Income) (Detail) Network

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533 Implied Table Table

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534 Other Expense Income [abstract] Abstract tgb:OtherExpenseIncomeAbstract
535 Management fee income Concept (Monetary) For Period Credit tgb:ManagementFeeIncome
536 Other operating expense (income), net Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
537 Write-down of mine equipment Concept (Monetary) For Period Debit tgb:WriteDownOfMineEquipment
538 Write-down of investment Concept (Monetary) For Period Debit tgb:WriteDownsOfInvestments
539 Other (income) expenses Concept (Monetary) For Period Credit tgb:OtherIncomeAndExpense
540 1071 - Disclosure - Other Expenses (Income) - Additional Information (Detail) Network

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541 Disclosure of financial assets [table] Table

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542 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
543 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
544 Investments In Subscription Receipts [member] Member tgb:InvestmentsInSubscriptionReceiptsMember
545 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
546 Write-down of investment Concept (Monetary) For Period Debit tgb:WriteDownsOfInvestments
547 Unrealized loss of investment Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax
548 1072 - Disclosure - Finance Expenses - Summary of Finance Expenses (Detail) Network

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549 Implied Table Table

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550 Disclosure of finance expense [abstract] Abstract tgb:DisclosureOfFinanceExpenseAbstract
551 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
552 Finance expense - deferred revenue Concept (Monetary) For Period Debit tgb:FinanceCostsIncludedInDeferredIncome
553 Accretion on PER Concept (Monetary) For Period Debit tgb:AccretionExpenseIncludedInFinanceCosts
554 Loss on settlement of long-term debt Concept (Monetary) For Period Debit tgb:LossOnSettlementOfLongtermDebt
555 Finance expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
556 1073 - Disclosure - Finance Expenses - Additional Information (Detail) Network

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557 Implied Table Table

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558 Disclosure of finance expense [abstract] Abstract tgb:DisclosureOfFinanceExpenseAbstract
559 Loss on settlement of long-term debt Concept (Monetary) For Period Debit tgb:LossOnSettlementOfLongtermDebt
560 1074 - Disclosure - Income Tax - Summary of Income Tax Expense (Recovery) (Detail) Network

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561 Implied Table Table

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562 Major components of tax expense (income) [abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
563 Current period expense Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
564 Origination and reversal of temporary differences Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
565 Deferred tax adjustments related to prior periods Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
566 Deferred income tax expense (recovery) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
567 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
568 1075 - Disclosure - Income Tax - Summary of Effective Tax Rate Reconciliation (Detail) Network

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569 Implied Table Table

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570 Reconciliation of average effective tax rate and applicable tax rate [abstract] Abstract ifrs-full:ReconciliationOfAverageEffectiveTaxRateAndApplicableTaxRateAbstract
571 Income tax at Canadian statutory rate of 36.5% (2017: 35.6%) Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
572 Permanent differences Concept (Monetary) For Period Debit tgb:TaxEffectOfPermanentDifferences
573 Tax rate differences Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
574 Foreign tax rate differential Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
575 Unrecognized tax benefits Concept (Monetary) For Period Credit ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceCurrentTaxExpense
576 Deferred tax adjustments related to prior periods Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
577 Other Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
578 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
579 1076 - Disclosure - Income Tax - Summary of Effective Tax Rate Reconciliation (Parenthetical) (Detail) Network

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580 Implied Table Table

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581 Reconciliation of average effective tax rate and applicable tax rate [abstract] Abstract ifrs-full:ReconciliationOfAverageEffectiveTaxRateAndApplicableTaxRateAbstract
582 Canadian statutory rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
583 1077 - Disclosure - Income Tax - Summary of Deferred Tax Assets and Liabilities (Detail) Network

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584 Implied Table Table

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585 Deferred tax assets and liabilities [abstract] Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
586 Property, plant and equipment Concept (Monetary) As Of Credit tgb:DeferredTaxLiabilitiesPropertyPlantAndEquipment1
587 Other financial assets Concept (Monetary) As Of Debit tgb:DeferredTaxAssetsOther1
588 Provisions Concept (Monetary) As Of Debit tgb:DeferredTaxAssetsProvisions
589 Tax loss carry forwards Concept (Monetary) As Of Debit tgb:DeferredTaxAssetsLossCarryforwards
590 Deferred tax liability Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
591 1078 - Disclosure - Income Tax - Additional Information (Detail) Network

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592 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

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 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
593 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
594 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
595 Canada [member] Member country:CA
596 United states [member] Member country:US
597 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
598 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
599 Unused tax losses [member] Member ifrs-full:UnusedTaxLossesMember
600 Range [axis] Axis ifrs-full:RangeAxis
601 Ranges [member] Member ifrs-full:RangesMember
602 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
603 Top of range [member] Member ifrs-full:TopOfRangeMember
604 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
605 Pre-tax loss carryforward Concept (Monetary) For Period Credit tgb:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCredits
606 Tax loss carry forwards expiration year Concept (Text/String) For Period ifrs-full:DescriptionOfExpiryDateOfTemporaryDifferencesUnusedTaxLossesAndUnusedTaxCredits
607 Net operating loss carryforward, pre-tax Concept (Monetary) For Period Credit tgb:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsWithRestrictionOnDeductibility
608 Unrecognized tax liabilities Concept (Monetary) As Of Credit tgb:UnrecognizedDeferredTaxLiabilities
609 1079 - Disclosure - Income Tax - Summary of Unrecognized Deferred Tax Assets and Liabilities (Detail) Network

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610 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

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611 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
612 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
613 Debt [member] Member tgb:Debt1Member
614 Other investments [member] Member tgb:OtherInvestments1Member
615 Other financial assets [member] Member tgb:FinancialAssetOtherMember
616 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
617 Deductible temporary differences Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
618 Deferred tax asset Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
619 1080 - Disclosure - Accounts Receivable - Summary of Accounts Receivable (Detail) Network

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620 Implied Table Table

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621 Trade and other current receivables [abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
622 Trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
623 Other receivables from joint venture partner Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesDueFromJointVentures
624 Goods and services tax receivable Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
625 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherReceivables
626 Accounts receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
627 1081 - Disclosure - Inventories - Schedule of Inventories (Detail) Network

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628 Implied Table Table

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629 Classes of current inventories [abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
630 Ore stockpiles Concept (Monetary) As Of Debit ifrs-full:CurrentOreStockpiles
631 Copper contained in concentrate Concept (Monetary) As Of Debit tgb:CurrentCopperContainedInConcentrate
632 Molybdenum concentrate Concept (Monetary) As Of Debit tgb:CurrentMolybdenumConcentrate
633 Materials and supplies Concept (Monetary) As Of Debit ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies
634 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
635 1082 - Disclosure - Inventories - Additional Information (Detail) Network

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636 Implied Table Table

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637 Classes of current inventories [abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
638 Impairment of inventories Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
639 1083 - Disclosure - Other Financial Assets - Summary of Other Financial Assets (Detail) Network

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640 Disclosure of financial assets [table] Table

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 ifrs-full:DisclosureOfFinancialAssetsTable
641 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
642 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
643 Marketable securities [member] Member tgb:MarketableSecuritiesMember
644 Copper put option contracts [member] Member tgb:CopperPutOptionContractsMember
645 Investment in subscription receipts [member] Member tgb:InvestmentInSubscriptionReceiptsMember
646 Reclamation deposits [member] Member tgb:ReclamationDepositsMember
647 Restricted cash [member] Member tgb:RestrictedCashMember
648 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
649 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
650 Other non current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
651 1084 - Disclosure - Other Financial Assets - Additional Information (Detail) Network

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652 Disclosure of financial assets [table] Table

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653 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
654 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
655 Marketable securities [member] Member tgb:MarketableSecuritiesMember
656 Legal Entity [Axis] Axis dei:LegalEntityAxis
657 Entity [Domain] Member dei:EntityDomain
658 Yellowhead Mining Inc. [member] Member tgb:YellowheadMiningIncMember
659 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
660 Percentage of ownership interest Concept (Percent) As Of tgb:EquityOwnershipPercentage
661 Fair value of ownership interest Concept (Monetary) As Of Credit tgb:OwnershipInterestInInvestment
662 Stock issued on share exchange Concept (Monetary) For Period Credit tgb:StockIssuedOnShareExchangeValue
663 1085 - Disclosure - Property, Plant & Equipment - Summary of Property Plant & Equipment (Detail) Network

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664 Disclosure of detailed information about property, plant and equipment [table] Table

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665 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
666 Plant and equipment [Member] Member ifrs-full:PropertyPlantAndEquipmentMember
667 Property acquisition costs [member] Member tgb:PropertyAcquisitionCostsMember
668 Mineral properties [member] Member ifrs-full:MiningPropertyMember
669 Plant and equipment [member] Member ifrs-full:OtherPropertyPlantAndEquipmentMember
670 Construction in progress [member] Member ifrs-full:ConstructionInProgressMember
671 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
672 Carrying amount [member] Member ifrs-full:CarryingAmountMember
673 Cost [member] Member ifrs-full:GrossCarryingAmountMember
674 Accumulated depreciation [member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
675 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
676 Beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
677 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
678 Rehabilitation cost asset Concept (Monetary) For Period Debit tgb:IncreaseDecreaseThroughRehabilitationCostAssetPropertyPlantAndEquipment
679 Capitalized interest Concept (Monetary) For Period Debit tgb:PropertyPlantAndEquipmentInterestCapitalized
680 Depletion and amortization Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
681 Impairment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
682 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
683 Foreign exchange translation Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
684 Transfers between categories Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
685 Ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
686 1086 - Disclosure - Property, Plant & Equipment - Summary of Property Plant & Equipment (Parenthetical) (Detail) Network

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687 Disclosure of detailed information about property, plant and equipment [table] Table

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688 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
689 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
690 Florence copper project [member] Member tgb:FlorenceCopperProjectMember
691 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
692 Capitalized interest rate Concept (Percent) For Period ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
693 1087 - Disclosure - Property, Plant & Equipment - Additional Information (Detail) Network

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694 Disclosure of detailed information about property, plant and equipment [table] Table

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695 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
696 Continuing operations [member] Member ifrs-full:ContinuingOperationsMember
697 Aley niobium project [member] Member tgb:AleyNiobiumProjectMember
698 Florence copper project [member] Member tgb:FlorenceCopperProjectMember
699 New prosperity gold-copper property [member] Member tgb:NewProsperityGoldcopperPropertyMember
700 Harmony gold property [member] Member tgb:HarmonyGoldPropertyMember
701 Gibraltar mining property [member] Member tgb:GibraltarMiningPropertyMember
702 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
703 Carrying amount [member] Member ifrs-full:CarryingAmountMember
704 Increase in Carrying Value of Property [member] Member tgb:IncreaseInCarryingValueOfPropertyMember
705 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
706 Plant and equipment [Member] Member ifrs-full:PropertyPlantAndEquipmentMember
707 Mineral properties [member] Member ifrs-full:MiningPropertyMember
708 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
709 Capitalized stripping costs Concept (Monetary) For Period Debit tgb:CapitalizedStrippingCosts
710 Other capital expenditures Concept (Monetary) For Period Debit tgb:OtherCapitalExpenditures
711 Capitalized development costs Concept (Monetary) For Period Debit tgb:CapitalizedDevelopmentCosts
712 Depreciation on non-cash additions of mining assets Concept (Monetary) For Period Debit tgb:DepreciationOnMiningAssetsRelatedToCapitalizedStripping
713 Increase (decreased) in rehabilitation cost asset Concept (Monetary) For Period Debit tgb:IncreaseDecreaseThroughRehabilitationCostAssetPropertyPlantAndEquipment
714 Net carrying amount of leased assets Concept (Monetary) As Of Debit tgb:LeasedAssetsNetCarryingValue
715 Property acquisition costs Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
716 1088 - Disclosure - Goodwill - Additional Information (Detail) Network

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717 Disclosure of reconciliation of changes in goodwill [table] Table

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718 Range [axis] Axis ifrs-full:RangeAxis
719 Ranges [member] Member ifrs-full:RangesMember
720 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
721 Top of range [member] Member ifrs-full:TopOfRangeMember
722 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
723 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
724 Discounted cash flow [member] Member ifrs-full:DiscountedCashFlowMember
725 Disclosure of reconciliation of changes in goodwill [line items] LineItems ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems
726 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
727 After-tax discount rate Concept (Percent) For Period tgb:AfterTaxDiscountRate
728 Copper price per pound Concept (Decimal) For Period tgb:CopperPricePerPound
729 1089 - Disclosure - Accounts Payable and Accrued Liabilities - Summary of Accounts Payable and Accrued Liabilities (Detail) Network

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730 Disclosure Of Accounts Payable And Accrued Liabilities [table] Table

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731 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
732 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
733 BC Hydro [member] Member tgb:BcHydroMember
734 Disclosure Of Accounts Payable And Accrued Liabilities [line items] LineItems tgb:DisclosureOfAccountsPayableAndAccruedLiabilitiesLineItems
735 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
736 Accrued liabilities Concept (Monetary) As Of Credit ifrs-full:AccrualsClassifiedAsCurrent
737 Accounts payable and accrued liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
738 1090 - Disclosure - Accounts Payable and Accrued Liabilities - Additional Information (Detail) Network

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739 Disclosure Of Accounts Payable And Accrued Liabilities [table] Table

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740 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
741 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
742 BC Hydro [member] Member tgb:BcHydroMember
743 Disclosure Of Accounts Payable And Accrued Liabilities [line items] LineItems tgb:DisclosureOfAccountsPayableAndAccruedLiabilitiesLineItems
744 Contract period Concept (xbrli:durationItemType) For Period tgb:DeferralProgramPeriod
745 Percentage of maximum deferred electricity costs Concept (Percent) For Period tgb:PercentageOfMaximumDeferredElectricityCosts
746 Interest added on prime rate Concept (Percent) For Period tgb:InterestAddedOnPrimeRateToDetermineMonthlyRepayableAmount
747 Description of amounts payable on the deferral program Concept (Text/String) For Period tgb:DescriptionAmountsPayableOnDeferralProgram
748 Average copper price exceeds threshold amount per pound Concept (Decimal) For Period tgb:AverageCopperPriceExceedsThresholdAmountPerPound
749 Deferral program effective date Concept (Date) For Period tgb:DeferralProgramEffectiveDate
750 1091 - Disclosure - Debt - Summary of Debt (Detail) Network

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751 Disclosure of detailed information about borrowings [table] Table

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752 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
753 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
754 Capital leases [member] Member tgb:CapitalLeasesMember
755 Secured equipment loans [member] Member tgb:SecuredEquipmentLoansMember
756 Senior Secured Notes [member] Member tgb:SeniorSecuredNotesMember
757 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
758 Current: Abstract ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowingsAbstract
759 Current portion of long-term debt Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
760 Long-term: Abstract ifrs-full:NoncurrentPortionOfNoncurrentBorrowingsByTypeAbstract
761 Long-term debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
762 1092 - Disclosure - Debt - Additional Information (Detail) Network

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763 Disclosure of detailed information about borrowings [table] Table

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*

 ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
764 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
765 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
766 Capital leases [member] Member tgb:CapitalLeasesMember
767 Senior Secured Notes [member] Member tgb:SeniorSecuredNotesMember
768 Secured equipment loans [member] Member tgb:SecuredEquipmentLoansMember
769 New equipment loan [member] Member tgb:NewEquipmentLoanMember
770 Range [axis] Axis ifrs-full:RangeAxis
771 Ranges [member] Member ifrs-full:RangesMember
772 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
773 Top of range [member] Member ifrs-full:TopOfRangeMember
774 Creation date [axis] Axis ifrs-full:CreationDateAxis
775 Default financial statements date [member] Member ifrs-full:DefaultFinancialStatementsDateMember
776 On or after June 15, 2018 [member] Member tgb:OnOrAfterJuneFifteenTwoThousandNineteenMember
777 Until June 15, 2019 [member] Member tgb:UntilJuneFifteenTwoThousandNineteenMember
778 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
779 Notes issued Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentNotesAndDebenturesIssued
780 Maturity date Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
781 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
782 Frequency of payments Concept (Text/String) For Period tgb:BorrowingsFrequencyOfPayments
783 Percentage of par value of debt Concept (Percent) For Period tgb:PercentageOfParValueOfDebt
784 Other transaction costs incurred Concept (Monetary) For Period Debit tgb:OtherTransactionCostsIncurredOnLongTermDebt
785 Net proceeds from issuance of senior secured notes Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures
786 Redemption price percentage Concept (Percent) For Period tgb:NotesRedemptionPricePercentage
787 Redeemable percentage Concept (Percent) For Period tgb:NotesRedeemablePercentage
788 Carrying value Concept (Monetary) As Of Credit ifrs-full:NotesAndDebenturesIssued
789 Maturity of payments, term Concept (xbrli:durationItemType) For Period tgb:BorrowingsMaturityOfPaymentsTerm
790 1093 - Disclosure - Deferred Revenue - Additional Information (Detail) Network

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791 Disclosure of deferred income [table] Table

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792 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
793 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
794 Osisko Gold Royalties Ltd [member] Member tgb:OsiskoGoldRoyaltiesLtdMember
795 Range [axis] Axis ifrs-full:RangeAxis
796 Ranges [member] Member ifrs-full:RangesMember
797 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
798 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
799 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
800 Gibraltar Mines Ltd [member] Member tgb:GibraltarMinesLtdMember
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823 Issuance of warrants Concept (Monetary) For Period Debit tgb:DeferredIncomeDecreaseWarrantsIssued
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826 Transitional adjustment for IFRS 15 Concept (Monetary) For Period Credit tgb:DeferredIncomeTransitionalAdjustmentForIFRS15
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828 Implied Table Table

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831 Non-current Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
832 Total Concept (Monetary) As Of Credit ifrs-full:DeferredIncome
833 1096 - Disclosure - Provision For Environmental Rehabilitation - Summary of Provision for Environmental Rehabilitation (Detail) Network

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863 Reclamation bonds issued Concept (Monetary) As Of Credit ifrs-full:BondsIssued
864 Cash collateral Concept (Monetary) As Of Credit ifrs-full:CashCollateralReceivedSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets
865 Restricted cash Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
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867 Reclamation deposits Concept (Monetary) As Of Debit tgb:ReclamationDeposits
868 1098 - Disclosure - Equity - Summary of Equity (Detail) Network

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869 Implied Table Table

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873 Exercise of warrants Concept (Shares) For Period tgb:ExerciseOfWarrantsStock
874 Exercise of share options Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
875 Common shares outstanding ending balance Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
876 1099 - Disclosure - Equity - Summary of Equity (Parenthetical) (Detail) Network

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877 Implied Table Table

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881 Implied Table Table

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885 Share purchase warrants expiration date Concept (Date) For Period tgb:WarrantsExpirationDate
886 Share purchase warrants issue date Concept (Date) For Period tgb:WarrantsIssuedDate
887 1101 - Disclosure - Share-based Compensation - Additional Information (Detail) Network

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888 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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903 Maximum allowable under the plan for independent directors Concept (Percent) For Period tgb:MaximumAllowableUnderThePlanForIndependentDirectors
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910 Long-term financial liability Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
911 Percentage of performance factor Concept (Percent) For Period tgb:PercentageOfPerformanceFactor
912 Number of share options granted in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
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915 1102 - Disclosure - Share-based Compensation - Summary of Options and Average Price (Detail) Network

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916 Implied Table Table

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919 Options, Granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
920 Options, Exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
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927 Average price, Exercised Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
928 Average price, Cancelled/forfeited Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
929 Average price, Expired Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
930 Average price, Outstanding ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
931 Average price, Exercisable Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
932 1103 - Disclosure - Share-based Compensation - Summary of Options and Average Life (Detail) Network

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933 Disclosure of number and weighted average remaining contractual life of outstanding share options [table] Table

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937 Top of range [member] Member ifrs-full:TopOfRangeMember
938 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
939 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
940 $0.38 to $0.68 [Member] Member tgb:ExercisePriceOneMember
941 $0.69 to $1.02 [Member] Member tgb:ExercisePriceTwoMember
942 $1.03 to $1.64 [Member] Member tgb:ExercisePriceThreeMember
943 $1.65 to $2.40 [Member] Member tgb:ExercisePriceFourMember
944 $2.41 to $2.86 [Member] Member tgb:ExercisePriceFiveMember
945 Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] LineItems ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems
946 Exercise price Concept (Monetary) As Of ifrs-full:ExercisePriceOfOutstandingShareOptions
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948 Exercise price, Average life (years) Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
949 1104 - Disclosure - Share-based Compensation - Summary of Inputs Used in Measurement of Fair Value at Grant Date (Detail) Network

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950 Implied Table Table

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953 Forfeiture rate Concept (Percent) For Period tgb:DescriptionOfForfeitureRateShareOptionsGranted
954 Volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
955 Dividend yield Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
956 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
957 Weighted-average fair value per option Concept (Monetary) For Period ifrs-full:WeightedAverageSharePriceShareOptionsGranted
958 1105 - Disclosure - Share-based Compensation - Summary of DSUs and PSUs Issued and Outstanding (Detail) Network

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959 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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963 Performance share units (PSUs) [member] Member tgb:PerformanceShareUnitsMember
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967 Settled Concept (Decimal) For Period tgb:NumberOfOtherEquityInstrumentsSettledInSharebasedPaymentArrangement
968 Outstanding at ending balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
969 1106 - Disclosure - Share-based Compensation - Summary of Share Based Compensation Expense (Recovery) (Detail) Network

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970 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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976 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
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978 1107 - Disclosure - Commitments and Contingencies - Summary of Future Minimum Payments of Commitments (Detail) Network

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985 2021 [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
986 2022 [member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
987 2023 and thereafter [Member] Member ifrs-full:LaterThanFiveYearsMember
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989 Commitments Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
990 1108 - Disclosure - Commitments and Contingencies - Additional Information (Detail) Network

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995 Legal Entity [Axis] Axis dei:LegalEntityAxis
996 Entity [Domain] Member dei:EntityDomain
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1001 Capital lease and equipment loans Concept (Percent) For Period tgb:PercentageOfCapitalLeaseAndEquipmentLoans
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1004 Remaining portion of ownership interest in joint venture Concept (Percent) For Period tgb:RemainingProportionOfOwnershipInterestInJointVenture
1005 1109 - Disclosure - Supplementary Cash Flow Information - Schedule of Supplementary Cash Flow Information (Detail) Network

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1006 Implied Table Table

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1008 Accounts receivable Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
1009 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
1010 Prepaids Concept (Monetary) For Period Debit tgb:AdjustmentsForDecreaseIncreaseInPrepaids
1011 Accounts payable and accrued liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
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1013 Income tax payable Concept (Monetary) For Period Debit tgb:NoncashWorkingCapitalInIncomeTaxesPaid
1014 Income tax received Concept (Monetary) For Period Debit tgb:NoncashWorkingCapitalInIncomeTaxReceivables
1015 Total Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
1016 Share purchase warrants issued (Note 18) Concept (Monetary) For Period Debit tgb:NoncashInvestingAndFinancingActivitiesInSharePurchaseWarrantsIssued
1017 Assets acquired under capital lease Concept (Monetary) For Period Debit tgb:NoncashInvestingAndFinancingActivitiesAssetsAcquiredUnderCapitalLease
1018 Share purchase warrants exercised Concept (Monetary) For Period Debit tgb:NoncashInvestingAndFinancingActivitiesInSharePurchaseWarrantsExercised
1019 1110 - Disclosure - Financial Risk Management - Exposure to Commodity Price Risk (Detail) Network

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1020 Disclosure of commodity price risk for financial instruments [table] Table

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1026 1111 - Disclosure - Financial Risk Management - Exposure to Commodity Price Risk (Parenthetical) (Detail) Network

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1036 1112 - Disclosure - Financial Risk Management - Additional Information (Detail) Network

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1037 Disclosure Of Financial Risk Management [table] Table

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1047 Percentage CAD strengthening against USD Concept (Percent) For Period tgb:PercentageOfStrengtheningOfMajorCurrenciesAgainstFunctionalCurrency
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1055 Transfers out of Level 3 into Level 2 of fair value hierarchy Concept (Monetary) For Period tgb:TransfersOutOfLevel3IntoLevel2OfFairValueHierarchyAssets
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1057 Discount rate used for determining the fair value of the capital leases and equipment loans (liabilities) Concept (Percent) As Of tgb:DiscountRateUsedForDeterminingFairValueOfCapitalLeasesAndEquipmentLoansLiabilities
1058 1113 - Disclosure - Financial Risk Management - Summary of Impact on Earnings After Tax and Equity (Detail) Network

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1059 Schedule of Interest Rate Sensitivity Analysis [table] Table

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1060 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1061 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1062 Capital leases [member] Member tgb:CapitalLeasesMember
1063 Secured equipment loans [member] Member tgb:SecuredEquipmentLoansMember
1064 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
1065 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
1066 Senior Secured Notes [member] Member tgb:SeniorSecuredNotesMember
1067 Cash and cash equivalent [member] Member tgb:CashAndCashEquivalentMember
1068 Reclamation deposits [member] Member tgb:ReclamationDepositsMember
1069 Schedule of Interest Rate Sensitivity Analysis [line items] LineItems tgb:ScheduleOfInterestRateSensitivityAnalysisLineItems
1070 Fair value sensitivity for fixed-rate instruments Concept (Monetary) For Period Credit tgb:FinancialInstrumentsAdjustmentsOnDerivativeAtFairValue
1071 Cash flow sensitivity for variable-rate instruments Concept (Monetary) For Period Credit tgb:FinancialInstrumentsAdjustmentsOnDerivativeAtCarryingValue
1072 1114 - Disclosure - Financial Risk Management - Schedule of Changes in Assets and Liabilities on Basis of Strengthening CAD Against USD (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialRiskManagementScheduleOfChangesInAssetsAndLiabilitiesOnBasisOfStrengtheningCADAgainstUSD
1073 Disclosure Foreign Currency Sensitivity Analysis [table] Table

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 tgb:DisclosureForeignCurrencySensitivityAnalysisTable
1074 Types of financial liabilities [axis] Axis ifrs-full:TypesOfFinancialLiabilitiesAxis
1075 Financial liabilities, type [member] Member ifrs-full:FinancialLiabilitiesTypeMember
1076 Secured equipment loans [member] Member tgb:SecuredEquipmentLoansMember
1077 Types of financial assets [axis] Axis ifrs-full:TypesOfFinancialAssetsAxis
1078 Financial assets, type [member] Member ifrs-full:FinancialAssetsTypeMember
1079 Cash and cash equivalent [member] Member tgb:CashAndCashEquivalentMember
1080 Accounts receivable [Member] Member tgb:AccountsReceivable1Member
1081 Copper put option contracts [member] Member tgb:CopperPutOptionContractsMember
1082 Accounts payable and accrued liabilities [member] Member tgb:AccountsPayableAndAccruedLiabilitiesMember
1083 Senior Secured Notes [member] Member tgb:SeniorSecuredNotesMember
1084 Disclosure Foreign Currency Sensitivity Analysis [line items] LineItems tgb:DisclosureForeignCurrencySensitivityAnalysisLineItems
1085 Change in financial assets and liabilities due to exchange rate Concept (Monetary) As Of Debit tgb:IncreaseDecreaseInFinancialAssetsLiabilitiesDueToTenPercentStrengtheningInExchangeRates
1086 1115 - Disclosure - Financial Risk Management - Summary of Derivative Instruments Options Outstanding (Detail) Network

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1087 Disclosure of detailed information about financial instruments [table] Table

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 ifrs-full:DisclosureOfFinancialInstrumentsTable
1088 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1089 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1090 Level 1 [member] Member ifrs-full:Level1OfFairValueHierarchyMember
1091 Level 2 [member] Member ifrs-full:Level2OfFairValueHierarchyMember
1092 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
1093 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1094 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1095 Financial assets at fair value through other comprehensive income, category [member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1096 Financial assets at fair value through profit or loss, category [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1097 Financial assets available-for-sale, category [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1098 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1099 Copper put option contracts Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1100 Marketable securities Concept (Monetary) As Of Debit ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
1101 Investment in subscription receipts Concept (Monetary) As Of Debit tgb:AssetsForInvestmentsInSubscriptionReceipts
1102 Reclamation deposits Concept (Monetary) As Of Debit tgb:ReclamationDeposits
1103 Financial assets designated at fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
1104 1116 - Disclosure - Financial Risk Management - Summary of Capital Management (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialRiskManagementSummaryOfCapitalManagement
1105 Implied Table Table

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 implied:Table
1106 Capital structure [abstract] Abstract tgb:CapitalStructureAbstract
1107 Cash Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1108 Current portion of long-term debt Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
1109 Long-term debt Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1110 Net debt Concept (Monetary) As Of Credit ifrs-full:NetDebt
1111 Shareholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
1112 1117 - Disclosure - Related Parties - Summary of Ownership Interest of Subsidiaries (Detail) Network

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1113 Disclosure of subsidiaries [table] Table

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 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1114 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1115 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1116 Gibraltar Mines Ltd [member] Member tgb:GibraltarMinesLtdMember
1117 Curis Resources Ltd [Member] Member tgb:CurisResourcesLtdMember
1118 Curis Holdings (Canada) Ltd [Member] Member tgb:CurisHoldingsCanadaLtdMember
1119 Florence Copper Inc [member] Member tgb:FlorenceCopperIncMember
1120 Aley Corporation [member] Member tgb:AleyCorporationMember
1121 672520 BC Ltd. [member] Member tgb:SixSevenTwoFiveTwoZeroBcLtdMember
1122 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1123 Ownership interest of subsidiaries Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1124 1118 - Disclosure - Related Parties - Summary of Compensation for Key Management Personnel (Detail) Network

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 http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartiesSummaryOfCompensationForKeyManagementPersonnel
1125 Implied Table Table

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 implied:Table
1126 Related party transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
1127 Salaries and benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1128 Post-employment benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
1129 Share-based compensation (recovery) expense Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1130 Key management personnel compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1131 1119 - Disclosure - Related Parties - Additional Information (Detail) Network

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1132 Disclosure of transactions between related parties [table] Table

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 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1133 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1134 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1135 Related parties [member] Member ifrs-full:RelatedPartiesMember
1136 Gibraltar Joint Venture [member] Member tgb:GibraltarJointVentureMember
1137 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1138 Related party transactions Concept (Monetary) For Period Debit tgb:RelatedPartyTransactions
1139 Administrative, legal, exploration and tax services Concept (Monetary) For Period Debit tgb:AdministrativeLegalExplorationAndTaxServices
1140 Reimbursements of office rent costs Concept (Monetary) For Period Debit tgb:ReimbursementsOfOfficeRentCosts
1141 Director fees Concept (Monetary) For Period Debit ifrs-full:DirectorsRemunerationExpense
1142 Management fee income Concept (Monetary) For Period Credit ifrs-full:PortfolioAndOtherManagementFeeIncome
1143 Reimbursable compensation expenses and third party costs Concept (Monetary) For Period Debit tgb:ReimbursableCompensationExpensesAndThirdPartyCosts

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