XML 88 R121.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Assumptions (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) $ / ounce Rate | Dec. 31, 2019 USD ($) $ / ounce ozt $ / pound Rate | Dec. 31, 2018 USD ($) $ / ounce $ / pound
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Impairment (reversals) charges |  |  | $ (1,423,000,000) | $ 900,000,000
Copper | Average |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
WACC |  |  |  | 10.00%
Gold[member] |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce |  |  | 1,300 | 1,250
LOM year |  |  | 19 years | 15 years
Gold[member] | Average |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
NAV multiple |  |  | 1,200.000 | 1,050.000
WACC |  |  | 4.00% | 7.00%
Gold[member] | Minimum |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | ozt |  |  | 20 |
WACC |  |  | 3.00% | 4.00%
Gold[member] | Maximum |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | ozt |  |  | 30 |
WACC |  |  | 7.00% | 11.00%
Silver | Minimum |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | ozt |  |  | 0.28 |
Silver | Maximum |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | ozt |  |  | 0.42 |
Long-term | Copper |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / pound |  |  | 3.00 | 2.85
Acacia Mining PLC |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) |  | 1,200 |  |
WACC | Rate |  |  | 11.00% |
Acacia Mining PLC | One percent increase in WACC [Member] |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Estimated Change in Discount Rate Used In Current Measurement Of Fair Value Less Costs Of Disposal | Rate |  | 1.00% |  |
Lagunas Norte | Minimum |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
NAV multiple |  |  | 1.100 |
Lagunas Norte | Maximum |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
NAV multiple |  |  | 1.200 |
$100 Increase in Gold Price | Acacia Mining PLC |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce |  | 100 |  |
Estimated Change in Discount Rate Used In Current Measurement Of Fair Value Less Costs Of Disposal | Rate |  | 1.00% |  |
$100 Decrease in Gold Price | Acacia Mining PLC |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce |  | 100 |  |
Impairment (reversals) charges |  | $ 98 |  |
$0.25 decrease in copper |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce |  |  | 0 |
Other impaired assets [member] | Lagunas Norte |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Impairment (reversals) charges |  |  | $ 166,000,000 |
Estimated gold price |  |  | 1,250 |
Impairment (reversals) of long lived assets |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
Impairment (reversals) charges |  |  | $ (1,423,000,000) | $ 746,000,000
Individual assets or cash-generating units [member] | Lagunas Norte |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |
WACC | Rate |  |  | 3.80% |
Impairment (reversals) charges | $ 405,000,000 |  | $ 12,000,000 | $ 405,000,000
Estimated gold price |  |  | $ 1,200 |

X
- Definition Estimated change in discount rate used In current measurement of fair value less costs of disposal + References No definition available. + Details
Name: | abx_EstimatedChangeinDiscountRateUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated mineral price for measurement of fair value less costs Of disposal + References No definition available. + Details
Name: | abx_EstimatedMineralPriceForMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix: | abx_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated gold price used in calculated in determining impairment + References No definition available. + Details
Name: | abx_Estimatedgoldprice
Namespace Prefix: | abx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Life of mine used in current measurement of fair value less costs of disposal + References No definition available. + Details
Name: | abx_LifeOfMineUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix: | abx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net asset value multiple used in current measurement of fair value less costs of disposal + References No definition available. + Details
Name: | abx_NetAssetValueMultipleUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix: | abx_
Data Type: | xbrli:decimalItemType
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_DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The discount rate used in the current measurement of fair value less costs of disposal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2018-01-01 -Paragraph 130 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_130_f_iii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DiscountRateUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of impairment loss, impairment gain or reversal of impairment loss that is recognised in profit or loss in accordance with paragraph 5.5.8 of IFRS 9 and that arises from applying the impairment requirements in Section 5.5 of IFRS 9. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_ba&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=abx_GoldcommodityMember
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: |

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

X
- Details
Name: | ifrs-full_ContractDurationAxis=ifrs-full_LongtermContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=abx_AcaciaMiningPLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abx_ChangeinWACCAxis=abx_OnepercentincreaseinWACCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=abx_LagunasNorteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abx_PriceChangeAssumptionAxis=abx_A100IncreaseinGoldPriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abx_PriceChangeAssumptionAxis=abx_A100DecreaseinGoldPriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abx_PriceChangeAssumptionAxis=abx_A0.25decreaseincopperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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