XML 192 R111.htm IDEA: XBRL DOCUMENT
v3.20.4

INVENTORIES - Ore in Stockpiles and on Leach Pads (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of operating segments [line items] |  |
Ore in stockpiles | $ 2,856 | $ 2,833
Ore on leach pads | 591 | 623
Gold[member] |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 2,742 | 2,678
Ore on leach pads | 591 | 623
Gold[member] | Carlin |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 1,029 | 1,020
Ore on leach pads | 179 | 180
Gold[member] | Pueblo Viejo |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 646 | 649
Gold[member] | Turquoise Ridge |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 365 | 258
Ore on leach pads | 39 | 33
Gold[member] | Loulo Gounkoto |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 171 | 167
Gold[member] | North Mara [Member] |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 133 | 136
Gold[member] | Cortez |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 127 | 174
Ore on leach pads | 58 | 50
Gold[member] | Lagunas Norte [Member] |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 73 | 73
Ore on leach pads | 121 | 148
Gold[member] | Veladero |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 58 | 52
Ore on leach pads | 133 | 123
Gold[member] | Phoenix |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 47 | 39
Ore on leach pads | 26 | 44
Gold[member] | Tongon |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 33 | 29
Gold[member] | Porgera |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 30 | 33
Gold[member] | Buzwagi |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 15 | 47
Gold[member] | Hemlo |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 14 | 1
Gold[member] | Other |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 1 | 0
Gold[member] | Long Canyon |  |
Disclosure of operating segments [line items] |  |
Ore on leach pads | 33 | 43
Gold[member] | Pierina |  |
Disclosure of operating segments [line items] |  |
Ore on leach pads | 2 | 2
Copper |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | 114 | 155
Ore on leach pads | 0 | 0
Copper | Lumwana |  |
Disclosure of operating segments [line items] |  |
Ore in stockpiles | $ 114 | $ 155

X
- Definition Current Ore Leach Pads + References No definition available. + Details
Name: | abx_CurrentOreLeachPads
Namespace Prefix: | abx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Ore stockpiles + References No definition available. + Details
Name: | abx_OreStockpiles
Namespace Prefix: | abx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_CarlinMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_TurquoiseRidgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_LouloGounkotoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_NorthMaraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_PhoenixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_TongonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_PorgeraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_BuzwagiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_HemloMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_AllOtherPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_LongCanyonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=abx_PierinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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