XML 129 R81.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SIGNIFICANT ACCOUNTING POLICIES - Stock-Based Compensation (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 CAD
Stock options |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 4 years
RSUs |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 3 years
RSUs | Minimum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 2 years 6 months
RSUs | Maximum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 3 years
DSUs |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Minimum required annual retainer (as percent) | 75.00%
PRSUs |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 3 years
PRSUs | Minimum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting percentage (as percent) | 0.00%
PRSUs | Maximum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting percentage (as percent) | 200.00%
PGSUs | Minimum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting percentage (as percent) | 100.00%
PGSUs | Maximum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting percentage (as percent) | 600.00%
ESPP |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Vesting period | 1 year
Employer matching contribution (as percent) | 50.00%
Maximum employer contribution | CAD 5,000
ESPP | Minimum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Annual contributions per employee (as percent) | 1.00%
ESPP | Maximum |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Annual contributions per employee (as percent) | 6.00%

X
- Definition Share-based compensation arrangement by share-based payment award, minimum amount of required annual retainer available for election + References No definition available. + Details
Name: | abx_SharebasedCompensationArrangementbySharebasedPaymentAwardMinimumAmountofRequiredAnnualRetainerAvailableforElection
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based payment arrangement, annual contributions per employee, percent + References No definition available. + Details
Name: | abx_SharebasedPaymentArrangementAnnualContributionsPerEmployeePercent
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based payment arrangement, employer matching contribution, maximum amount of match + References No definition available. + Details
Name: | abx_SharebasedPaymentArrangementEmployerMatchingContributionMaximumAmountofMatch
Namespace Prefix: | abx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-based payment arrangement, employer matching contribution, percent of match + References No definition available. + Details
Name: | abx_SharebasedPaymentArrangementEmployerMatchingContributionPercentofMatch
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Vesting percentage for share-based payment arrangement + References No definition available. + Details
Name: | abx_VestingPercentageForSharebasedPaymentArrangement
Namespace Prefix: | abx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Vesting requirements for share-based Ppment arrangement + References No definition available. + Details
Name: | abx_VestingRequirementsForSharebasedPaymentArrangement
Namespace Prefix: | abx_
Data Type: | xbrli:durationItemType
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_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=abx_StockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=abx_RestrictedShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=abx_DeferredShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=abx_PerformanceRestrictedShareUnitsPRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=abx_PerformanceGrantedShareUnitsPGSUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=abx_EmployeeSharePurchasePlanESPPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |