XML 136 R101.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Income Taxes - Additional Information (Detail) - CAD CAD in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of Income Taxes [line items] |  |  |  |
Statutory tax rate |  |  | 26.10% | 26.10%
Unrecognized deferred tax liabilities |  |  | CAD 694.0 | CAD 730.0
Net operating loss carryforwards |  |  | CAD 3,630.0 | 4,570.0
Loss carryforwards expiration, start year |  |  | 2028 |
Loss carryforwards expiration, end year |  |  | 2036 |
Cumulative Canadian development expenses |  |  | CAD 981.0 | 1,330.0
Development expenses deductible percentage |  |  | 30.00% |
Federal investment tax credits |  |  | CAD 103.7 |
Investment tax credits, start year |  |  | 2021 |
Investment tax credits, end year |  |  | 2037 |
United States [member] |  |  |  |
Disclosure of Income Taxes [line items] |  |  |  |
Statutory tax rate |  |  | 35.00% |
Changes in tax rates or tax laws enacted or announced [member] |  |  |  |
Disclosure of Income Taxes [line items] |  |  |  |
Increase in tax rate | 1.00% |  |  |
Increase in deferred tax liabilities |  |  | CAD 82.0 |
Changes in tax rates or tax laws enacted or announced [member] | United States [member] |  |  |  |
Disclosure of Income Taxes [line items] |  |  |  |
Statutory tax rate |  | 21.00% |  |
Reduction in deferred tax liabilities |  |  | 101.0 |
Unused Tax Credits [member] |  |  |  |
Disclosure of Income Taxes [line items] |  |  |  |
Unrecognized deferred tax assets |  |  | CAD 231.0 | CAD 270.0

X
- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ApplicableTaxRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in a deferred tax liability (asset). [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_IncreaseDecreaseInDeferredTaxLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of deferred tax liabilities net of deferred tax assets, when the absolute amount of deferred tax liabilities is greater than the absolute amount of deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_NetDeferredTaxLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cumulative development expenses. + References No definition available. + Details
Name: | teck_CumulativeDevelopmentExpenses
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred tax assets loss carryforwards expiration year end. + References No definition available. + Details
Name: | teck_DeferredTaxAssetsLossCarryforwardsExpirationYearEnd
Namespace Prefix: | teck_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred tax assets loss carryforwards expiration year start. + References No definition available. + Details
Name: | teck_DeferredTaxAssetsLossCarryforwardsExpirationYearStart
Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in income taxes. + References No definition available. + Details
Name: | teck_DisclosureOfIncomeTaxesLineItems
Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase decrease in applicable tax rate. + References No definition available. + Details
Name: | teck_IncreaseDecreaseInApplicableTaxRate
Namespace Prefix: | teck_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment tax credits. + References No definition available. + Details
Name: | teck_InvestmentTaxCredits
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Investment tax credits expiration year end. + References No definition available. + Details
Name: | teck_InvestmentTaxCreditsExpirationYearEnd
Namespace Prefix: | teck_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment tax credits expiration year start. + References No definition available. + Details
Name: | teck_InvestmentTaxCreditsExpirationYearStart
Namespace Prefix: | teck_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net operating loss carryforwards. + References No definition available. + Details
Name: | teck_NetOperatingLossCarryforwards
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Potential tax benefit percentage. + References No definition available. + Details
Name: | teck_PotentialTaxBenefitPercentage
Namespace Prefix: | teck_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unrecognized deferred tax assets. + References No definition available. + Details
Name: | teck_UnrecognizedDeferredTaxAssets
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unrecognized deferred tax liabilities. + References No definition available. + Details
Name: | teck_UnrecognizedDeferredTaxLiabilities
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_ChangesInTaxRatesOrTaxLawsEnactedOrAnnouncedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_UnusedTaxCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |