XML 220 R152.htm IDEA: XBRL DOCUMENT
v3.8.0.1

DEFERRED INCOME TAXES - Expiry Dates of Tax Losses and AMT (Details) - Non-capital tax losses $ in Millions | Dec. 31, 2017 USD ($)
--- | ---
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | $ 12,892
Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 2,093
Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 271
Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 6,614
Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,052
Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,756
Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 531
Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 575
2018 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 4,849
2018 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2018 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2018 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 4,727
2018 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2018 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2018 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 115
2018 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 7
2019 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 922
2019 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 922
2019 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 217
2020 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 217
2020 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 296
2021 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 271
2021 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 13
2021 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 12
2021 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2021 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 3,232
After 2021 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 2,093
After 2021 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2021 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 735
After 2021 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2021 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2021 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 404
After 2021 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 3,376
No expiry date | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,052
No expiry date | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,756
No expiry date | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | $ 568

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

X
- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_AR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_BB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_TZ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_ZM
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=abx_AllOtherCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=abx_LaterThanFourYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=abx_NoMaturityDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |