XML 150 R82.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SIGNIFICANT ACCOUNTING POLICIES - Post-Retirement Benefits (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017
Employees |
Disclosure of defined benefit plans [line items] |
Employer matching contribution, percent of salary | 6.00%
Officers |
Disclosure of defined benefit plans [line items] |
Employer matching contribution, percent of salary | 15.00%

X
- Definition Defined benefit plans, employer matching contribution, percent of employees' gross pay + References No definition available. + Details
Name: | abx_DefinedBenefitPlansEmployerMatchingContributionPercentofEmployeesGrossPay
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | abx_TitleofIndividualAxis=abx_EmployeeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | abx_TitleofIndividualAxis=abx_Officer1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |