XML 109 R74.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Asset and Goodwill Impairment Testing - Summary of Key Assumptions Used in Our Asset Impairment, Asset Impairment Reversal and Goodwill Impairment Analyses (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of information for cash-generating units [line items] |  |
Long-term foreign exchange rate | 1 U.S. to 1.25 Canadian dollars | 1 U.S. to 1.25 Canadian dollars
Inflation rate | 2.00% | 2.00%
Steelmaking Coal [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Key assumptions used in asset impairment, asset impairment reversal and goodwill impairment | Current price used in initial year, decreased to a long-term price in 2022 of US$140 per tonne | Current price used in initial year, decreased to a long-term price in 2021 of US$130 per tonne
Copper [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Key assumptions used in asset impairment, asset impairment reversal and goodwill impairment | Current price used in initial year, decreased to a long-term price in 2022 of US$3.00 per pound | Current price used in initial year, increased to a long-term price in 2021 of US$3.00 per pound
WCS oil [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Key assumptions used in asset impairment, asset impairment reversal and goodwill impairment | Current price used in initial year, increased to a long-term price in 2022 of US$57 per barrel | Current price used in initial year, increased to a long-term price in 2021 of US$57 per barrel
Discount rate | 5.20% | 5.50%
Bottom of range [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Discount rate | 5.20% | 5.50%
Top of range [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Discount rate | 5.90% | 6.00%

X
- Definition The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 134 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_d_v&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 134 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_e_v&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of key assumption rate on which management has based cash flow projections. + References No definition available. + Details
Name: | teck_DescriptionOfKeyAssumptionRateOnWhichManagementHasBasedCashFlowProjections
Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of key assumption rate on which management has based cash flow projections commodity price. + References No definition available. + Details
Name: | teck_DescriptionOfKeyAssumptionRateOnWhichManagementHasBasedCashFlowProjectionsCommodityPrice
Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of key assumption rate on which management has based cash flow projections inflation rate. + References No definition available. + Details
Name: | teck_DescriptionOfKeyAssumptionRateOnWhichManagementHasBasedCashFlowProjectionsInflationRate
Namespace Prefix: | teck_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

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

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

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |