XML 201 R120.htm IDEA: XBRL DOCUMENT
v3.20.4

IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Impairment Losses (Reversals) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | $ (269) | $ (1,423)
Impairment reversals (note 10) |  | (269) | (1,423)
Tanzanian Mines [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 304 |
Impairment reversals (note 10) |  | 304 |
Individual assets | Tanzanian Mines [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | (304) | 0
Impairment reversals (note 10) |  | (304) | 0
Individual assets | Cortez |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 10 | 57
Impairment reversals (note 10) |  | 10 | 57
Individual assets | Pueblo Viejo |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 5 | (865)
Impairment reversals (note 10) |  | 5 | (865)
Individual assets | Lumwana |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges | $ (947) | 0 | (947)
Impairment reversals (note 10) | $ (947) | 0 | (947)
Individual assets | Pascua-Lama |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 296
Impairment reversals (note 10) |  | 0 | 296
Individual assets | Lagunas Norte [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 12
Impairment reversals (note 10) |  | 0 | 12
Individual assets | Golden Sunlight [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 9
Impairment reversals (note 10) |  | 0 | 9
Individual assets | Veladero [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 3
Impairment reversals (note 10) |  | 0 | 3
Individual assets | Other |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 8 | 12
Impairment reversals (note 10) |  | 8 | 12
Intangible assets and goodwill |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 12 | 0
Impairment reversals (note 10) |  | 12 | 0
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 |  | (269) | (1,423)
Impairment reversals (note 10) |  | $ (269) | $ (1,423)

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 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 2019-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_82_ba&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ImpairmentLossImpairmentGainAndReversalOfImpairmentLossDeterminedInAccordanceWithIFRS9
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_SegmentsAxis=abx_TanzanianMinesMember
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: |

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

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

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

X
- Details
Name: | ifrs-full_SegmentsAxis=abx_PascuaLama1Member
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: | ifrs-full_SegmentsAxis=abx_GoldenSunlightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=ifrs-full_IntangibleAssetsAndGoodwillMember
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: |