XML 95 R67.htm IDEA: XBRL DOCUMENT
v3.21.1

DERIVATIVE INSTRUMENTS - Disclosure of (gains) losses associated with derivative instruments (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items] |  |
Losses associated with derivatives | $ (1,937) | $ 2,834
Copper put option contracts [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Realized (gain) loss on options | (4,361) | 2,834
Unrealized (gain) loss on options | 1,853 | 0
Fuel call options [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Realized (gain) loss on options | 602 | 0
Unrealized (gain) loss on options | $ (31) | $ 0

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_85&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Realized gains losses on change in fair value of derivatives. + References No definition available. + Details
Name: | tgb_RealizedGainsLossesOnChangeInFairValueOfDerivatives
Namespace Prefix: | tgb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrealized gains losses on change in fair value of derivatives. + References No definition available. + Details
Name: | tgb_UnrealizedGainsLossesOnChangeInFairValueOfDerivatives
Namespace Prefix: | tgb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tgb_CopperPutOptionContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_PurchasedCallOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |