XML 193 R116.htm IDEA: XBRL DOCUMENT v3.22.0.1

IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Narrative (Details) $ in Millions					3 Months Ended			12 Months Ended
	Jun. 01, 2021 USD ($)	Mar. 31, 2021 USD ($)	Apr. 25, 2020	Jan. 01, 2020	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) numberOfIndicators	Mar. 31, 2020 USD ($) $ / ounce	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Impairment and reversal of non-current assets
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity									$ (238)
Porgera [Member]
Impairment and reversal of non-current assets
Proportion of interest held by shareholders								95.00%
Proportion of ownership in joint operation			47.50%					47.50%
Recoverable amount						$ 297		$ 299	297
Veladero [Member]
Impairment and reversal of non-current assets
Proportion of ownership in joint operation								50.00%
Indicators of impairment loss | numberOfIndicators						1
Indicators of impairment reversal | numberOfIndicators						0
Lagunas Norte [Member]
Impairment and reversal of non-current assets
Percentage of ownership interest sold	100.00%
Reversal of impairment loss					$ (86)
Lagunas Norte [Member] | Maximum
Impairment and reversal of non-current assets
Consideration paid (received)	$ (81)
Lagunas Norte [Member] | At fair value
Impairment and reversal of non-current assets
Consideration paid (received)		$ (63)
Tanzanian Mines [Member]
Impairment and reversal of non-current assets
Proportion of ownership interests held by non-controlling interests				16.00%
Reversal of impairment loss recognised in profit or loss									$ 304
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity							$ 238
Loss (gain) on assignment of shareholder loans							$ 167
Tanzanian Mines [Member] | Minimum
Impairment and reversal of non-current assets
NAV multiple							1.1
Weighted average cost of capital, significant unobservable inputs, assets							5.40%
Tanzanian Mines [Member] | Maximum
Impairment and reversal of non-current assets
NAV multiple							1.3
Weighted average cost of capital, significant unobservable inputs, assets							6.20%
Tanzanian Mines [Member] | Long-term [Member]
Impairment and reversal of non-current assets
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce							1,300
Tanzanian Mines [Member] | Short-term [Member]
Impairment and reversal of non-current assets
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce							1,350
Bulyanhulu [Member] | Individual assets or cash-generating units [member]
Impairment and reversal of non-current assets
Recoverable amount							$ 1,237
Reversal of impairment loss recognised in profit or loss							663
North Mara [Member] | Individual assets or cash-generating units [member]
Impairment and reversal of non-current assets
Recoverable amount							967
Reversal of impairment loss recognised in profit or loss							$ 46

X

- Definition

Estimated mineral price for measurement of fair value less costs of disposal

+ References

No definition available.

+ Details

Name:	abx_EstimatedMineralPriceForMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix:	abx_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Indicators of impairment loss

+ References

No definition available.

+ Details

Name:	abx_IndicatorsOfImpairmentLoss
Namespace Prefix:	abx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Indicators of impairment reversal

+ References

No definition available.

+ Details

Name:	abx_IndicatorsOfImpairmentReversal
Namespace Prefix:	abx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loss (gain) on assignment of shareholder loans

+ References

No definition available.

+ Details

Name:	abx_LossGainOnAssignmentOfShareholderLoans
Namespace Prefix:	abx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Net asset value multiple used in current measurement of fair value less costs of disposal

+ References

No definition available.

+ Details

Name:	abx_NetAssetValueMultipleUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix:	abx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of ownership interest sold

+ References

No definition available.

+ Details

Name:	abx_PercentageOfOwnershipInterestSold
Namespace Prefix:	abx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

Weighted average cost of capital used as a significant Level 3 unobservable input for assets. [Refer: Level 3 of fair value hierarchy [member]]

+ References

No definition available.

+ Details

Name:	abx_WeightedAverageCostOfCapitalSignificantUnobservableInputsAssets
Namespace Prefix:	abx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2021-01-01
-Paragraph 40
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_40_a&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ConsiderationPaidReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The increase (decrease) in equity through changes in ownership interests in subsidiaries that do not result in loss of control. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 106
-Subparagraph d
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d_iii&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2021-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestInJointOperation
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 2021-01-01
-Paragraph 12
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_12_c&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The higher of an asset’s (or cash-generating unit’s) fair value less costs of disposal and its value in use. [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 130
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_130_e&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_RecoverableAmountOfAssetOrCashgeneratingUnit
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount recognised as an increase of the carrying amount of an asset or cash-generating unit to its recoverable amount when an impairment loss had been previously recognised. [Refer: Impairment loss]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 130
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_130_b&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 130
-Subparagraph d
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_130_d_ii&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ReversalOfImpairmentLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of reversal of impairment loss recognised in profit or loss. [Refer: Reversal of impairment loss; Profit (loss)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 126
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_126_b&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2021-01-01
-Paragraph 129
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_129_b&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_JointOperationsAxis=abx_PorgeraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=abx_VeladeroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=abx_LagunasNorteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MeasurementAxis=ifrs-full_AtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=abx_TanzanianMinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=abx_LongTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=abx_ShortTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=abx_BulyanhuluMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=ifrs-full_IndividualAssetsOrCashgeneratingUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=abx_NorthMaraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: