XML 161 R93.htm IDEA: XBRL DOCUMENT
v3.8.0.1

REVENUE - Provisional Copper and Gold Sales (Details) ozt in Thousands, lb in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) lb ozt | Dec. 31, 2016 USD ($) lb ozt
Copper |  |
Disclosure of Disaggregation of Revenue [Line Items] |  |
Volumes subject to final pricing Copper (millions) Gold (000s) | lb | 40 | 44
Impact on net income before taxation of 10% movement in market price US$ | $ 13 | $ 11
Gold |  |
Disclosure of Disaggregation of Revenue [Line Items] |  |
Volumes subject to final pricing Copper (millions) Gold (000s) | ozt | 0 | 13
Impact on net income before taxation of 10% movement in market price US$ | $ 0 | $ 2

X
- Definition [Line Items] for Disclosure of disaggregation of revenue [Table] + References No definition available. + Details
Name: | abx_DisclosureofDisaggregationofRevenueLineItems
Namespace Prefix: | abx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue before impact of market movements + References No definition available. + Details
Name: | abx_RevenueBeforeImpactofMarketMovements
Namespace Prefix: | abx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue Mineral Sales, Volume + References No definition available. + Details
Name: | abx_RevenueMineralSalesVolume
Namespace Prefix: | abx_
Data Type: | num:massItemType
Balance Type: | na
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_ProductsAndServicesAxis=abx_GoldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |