XML 108 R73.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Asset and Goodwill Impairment Testing - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 CAD | Dec. 31, 2016 CAD | Oct. 31, 2017 CAD
WCS oil [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Percentage of discount rate applied to cash flow projections | 5.20% | 5.50% |
Percentage of nominal post-tax discount rate | 7.30% | 7.60% |
Steelmaking Coal [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Recoverable amount of CGU exceeding carrying value |  |  | CAD 6,200,000,000
Decrease in price percentage |  |  | 14.00%
Mining operations and goodwill [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Percentage of discount rate applied to cash flow projections | 5.90% | 5.80% |
Percentage of nominal post-tax discount rate | 8.00% | 7.90% |
Fort Hills Project [member] | WCS oil [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Decrease in assumption | 1 |  |
Amount by which recoverable amount is reduced when key assumption changes for commodity price | CAD 140,000,000 |  |
Adjustment to interest rate basis | 0.25% |  |
Fort Hills Project [member] | WCS oil [member] | Discount rate [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Amount by which recoverable amount is reduced when key assumption changes for discount rate | CAD 150,000,000 |  |
Fort Hills Project [member] | WCS oil [member] | Canada, Dollars [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Decrease in assumption | 0.01 |  |
Amount by which recoverable amount is reduced when key assumption changes for foreign exchange rate | CAD 50,000,000 |  |
Steelmaking Coal Operations [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Cash flow period of mines | Cash flows cover periods of 15 to 42 years |  |
Quebrada Blanca [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Cash flow period of mines | Cash flows cover a period of 29 years |  |
Recoverable amount of CGU exceeding carrying value | CAD 1,200,000,000 |  |
Decrease in price percentage | 6.00% |  |
Period over which recoverable amount will be equal to carrying value | 3.5-year |  |
Steelmaking coal CGU [member] | Pretax [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment reversal | CAD 207,000,000 |  |
Steelmaking coal CGU [member] | After tax [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment reversal | 131,000,000 |  |
Fort Hills oil sands project [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Recoverable amount net of tax | CAD 3,700,000,000 | CAD 2,500,000,000 |
Cash flow period of mines | 49 years | 44 years |
Fort Hills oil sands project [member] | Pretax [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment charge | CAD 0 | CAD 222,000,000 |
Fort Hills oil sands project [member] | After tax [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment charge |  | 164,000,000 |
Other [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment charge |  | 72,000,000 |
Other [member] | Quebrada Blanca assets [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment charge | CAD 44,000,000 |  |
Other [member] | Trail operations [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment charge |  | 46,000,000 |
Other [member] | Wintering hills wind power facility [member] |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment charge |  | CAD 26,000,000 |

X
- Definition The amount by which a cash-generating unit's (group of units') recoverable amount exceeds its carrying amount. [Refer: Carrying amount [member]; 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 f -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_f_i&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 135 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_135_e_i&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount by which value that has been assigned to a key assumption must change in order for a unit's recoverable amount to be equal to its carrying amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 134 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_f_iii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 135 -Subparagraph e -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_135_e_iii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_AmountByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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 The description of periods when cash flows are expected to occur for cash flow hedges. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 23 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_23_a&doctype=Standard&book=B -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfPeriodsWhenCashFlowsExpectedToOccur
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_v&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_98_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount recognised as an increase of the carrying amount of an asset or cash-generating unit to its recoverable amount when an impairment loss had been previously recognised. [Refer: Impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_b&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_d_ii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ReversalOfImpairmentLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount by which recoverable amount is reduced when key assumption changes for commodity price. + References No definition available. + Details
Name: | teck_AmountByWhichRecoverableAmountIsReducedWhenKeyAssumptionChangesForCommodityPrice
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount by which recoverable amount is reduced when key assumption changes for discount rate. + References No definition available. + Details
Name: | teck_AmountByWhichRecoverableAmountIsReducedWhenKeyAssumptionChangesForDiscountRate
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount by which recoverable amount is reduced when key assumption changes for foreign exchange rate. + References No definition available. + Details
Name: | teck_AmountByWhichRecoverableAmountIsReducedWhenKeyAssumptionChangesForForeignExchangeRate
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Increase decrease in discount rate basis points percentage. + References No definition available. + Details
Name: | teck_IncreaseDecreaseInDiscountRateBasisPointsPercentage
Namespace Prefix: | teck_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage by which value assigned to key assumption must change in order for unit's recoverable amount to be equal to carrying amount + References No definition available. + Details
Name: | teck_PercentageByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitRecoverableAmountToBeEqualToCarryingAmount
Namespace Prefix: | teck_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of nominal post tax discount rate. + References No definition available. + Details
Name: | teck_PercentageOfNominalPostTaxDiscountRate
Namespace Prefix: | teck_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period of delay resulting in recoverable amount equal to carrying value. + References No definition available. + Details
Name: | teck_PeriodOfDelayResultingInRecoverableAmountEqualToCarryingValue
Namespace Prefix: | teck_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The higher of an asset's (or cash-generating unit's) fair value less costs of disposal and its value in use, net of tax. + References No definition available. + Details
Name: | teck_RecoverableAmountOfAssetOrCashgeneratingUnitNetOfTax
Namespace Prefix: | teck_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

X
- Details
Name: | ifrs-full_JointOperationsAxis=teck_FortHillsProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ActuarialAssumptionsAxis=ifrs-full_ActuarialAssumptionOfDiscountRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=currency_CAD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=teck_SteelmakingCoalOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=teck_QuebradaBlancaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=teck_SteelmakingCoalCguMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=teck_FortHillsOilSandsProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=teck_OtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnconsolidatedStructuredEntitiesAxis=teck_QuebradaBlancaAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnconsolidatedStructuredEntitiesAxis=teck_TrailOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_UnconsolidatedStructuredEntitiesAxis=teck_WinteringHillsWindPowerFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |