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Accounting for Financial Instruments - Schedule of Effect of Change in Commodity Prices on Profit (Loss) (Detail) CAD in Millions | 12 Months Ended
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Dec. 31, 2017 CAD USD_per_Pound | Dec. 31, 2016 CAD USD_per_Pound
Copper [member] |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Commodity price | 3.26 | 2.50
Copper [member] | Commodity Price Risk [member] |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Commodity price | 3.26 | 2.50
Change in Profit (Loss) Attributable to Shareholders | CAD | CAD 35 | CAD 24
Zinc [member] |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Commodity price | 1.50 | 1.17
Zinc [member] | Commodity Price Risk [member] |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Commodity price | 1.50 | 1.17
Change in Profit (Loss) Attributable to Shareholders | CAD | CAD 5 | CAD 5

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- Definition Commodity price. + References No definition available. + Details
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Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of commodity price risk for financial instruments. + References No definition available. + Details
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Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Effect on profit loss due to change in commodity price. + References No definition available. + Details
Name: | teck_EffectOnProfitLossDueToChangeInCommodityPrice
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ProductsAndServicesAxis=teck_CopperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CommodityPriceRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ProductsAndServicesAxis=teck_ZincMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |