XML 155 R85.htm IDEA: XBRL DOCUMENT
v3.20.4

ACQUISITIONS AND DIVESTITURES - Acquisition of Acacia (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Sep. 17, 2019 | Dec. 31, 2020 | Sep. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2020 | Dec. 31, 2020
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests | 16.00% |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  |  | 100.00%
Government of Tanzania |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  |  |  |  |  |  | 16.00%
Acacia Mining PLC |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interests held by non-controlling interests |  | 36.10% |  |  |  |  |
Share for share exchange |  | 0.168 |  |  |  |  |
Number of shares issued |  | 24,836,670 |  |  |  |  |
Proportion of interest held by shareholders |  | 1.00% |  |  |  |  |
Increase (decrease) through change in equity of subsidiaries, equity |  |  |  | $ 70 |  |  |
Proportion of ownership interest in subsidiary |  |  | 100.00% |  | 100.00% | 63.90% | 84.00%

X
- Definition Proportion of interest held by shareholders + References No definition available. + Details
Name: | abx_Proportionofinterestheldbyshareholders
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of equivalent shares that will be issued for each share exchanged in result of Randgold and Barrick merger + References No definition available. + Details
Name: | abx_Shareforshareexchange
Namespace Prefix: | abx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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_DisclosureOfBusinessCombinationsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in the entity's equity resulting from the change in the equity of subsidiaries. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of shares issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfSharesIssued
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interests in a subsidiary held by non-controlling interests. [Refer: Subsidiaries [member]; Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 12 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_12_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_CounterpartiesAxis=abx_GovernmentofTanzaniaMember
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: |