XML 176 R136.htm IDEA: XBRL DOCUMENT v3.10.0.1

FINANCIAL INSTRUMENTS - Derivative Narrative (Details) ozt in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) lb ozt bbl counterparty	Dec. 31, 2017 USD ($)	Dec. 31, 2018 AUD ($) lb ozt bbl counterparty	Dec. 31, 2016 bbl	Dec. 31, 2014 lb
Disclosure of detailed information about financial instruments [line items]
Number of counterparties | counterparty	12		12
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($11) and $3	$ 8,000,000	$ (16,000,000)
Commodity price risk | Fuel contracts
Disclosure of detailed information about financial instruments [line items]
Notional amount (gold in ounces; copper in pounds; and fuel in barrels) | bbl	114,000		114,000
Commodity price risk | Gold
Disclosure of detailed information about financial instruments [line items]
Notional amount (gold in ounces; copper in pounds; and fuel in barrels) | ozt	205		205
Commodity price risk | Gold positions
Disclosure of detailed information about financial instruments [line items]
Notional amount (gold in ounces; copper in pounds; and fuel in barrels) | ozt	35		35
Cash flow hedge
Disclosure of detailed information about financial instruments [line items]
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($11) and $3	$ 20,000,000	(19,000,000)
Hedge ineffectiveness due to changes in original forecasted transaction	0	5,000,000
Interest rate contracts | Cash flow hedge
Disclosure of detailed information about financial instruments [line items]
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($11) and $3	(1,000,000)	0
Hedge ineffectiveness due to changes in original forecasted transaction	0	0
Interest rate contracts | Cash flow hedge | Interest rate risk
Disclosure of detailed information about financial instruments [line items]
Notional amount	42,000,000
Currency contracts | Cash flow hedge | Currency risk
Disclosure of detailed information about financial instruments [line items]
Notional amount			$ 0
Fuel contracts | Cash flow hedge
Disclosure of detailed information about financial instruments [line items]
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($11) and $3	4,000,000	(8,000,000)
Hedge ineffectiveness due to changes in original forecasted transaction	$ 0	5,000,000
WTI Fuel Contract | Cash flow hedge | Commodity price risk
Disclosure of detailed information about financial instruments [line items]
Notional amount (gold in ounces; copper in pounds; and fuel in barrels) | bbl	0		0	8,040,000
Silver | Cash flow hedge | Commodity price risk
Disclosure of detailed information about financial instruments [line items]
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($11) and $3	$ 190,000,000
Notional amount (gold in ounces; copper in pounds; and fuel in barrels) | lb					65,000,000
Hedge ineffectiveness due to changes in original forecasted transaction	0
Copper | Cash flow hedge
Disclosure of detailed information about financial instruments [line items]
Unrealized gains (losses) on derivatives designated as cash flow hedges, net of tax ($11) and $3	17,000,000	(11,000,000)
Hedge ineffectiveness due to changes in original forecasted transaction	$ 0	$ 0
Copper | Cash flow hedge | Commodity price risk
Disclosure of detailed information about financial instruments [line items]
Notional amount (gold in ounces; copper in pounds; and fuel in barrels) | lb	0		0
Derivatives purchased during period | lb	44,000,000
Net Asset Position
Disclosure of detailed information about financial instruments [line items]
Number of counterparties | counterparty	5		5
Derivative financial assets (liabilities)	$ 2,000,000
Net Liability Position
Disclosure of detailed information about financial instruments [line items]
Number of counterparties | counterparty	7		7
Derivative financial assets (liabilities)	$ (2,000,000)

X

- Definition

Derivative Financial Asset (Liability), Net

+ References

No definition available.

+ Details

Name:	abx_DerivativeFinancialAssetLiabilityNet
Namespace Prefix:	abx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Derivative, Nonmonetary Notional Amount, Purchased During Period

+ References

No definition available.

+ Details

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

X

- Definition

Derivative, number of counterparties

+ References

No definition available.

+ Details

Name:	abx_DerivativeNumberofCounterparties
Namespace Prefix:	abx_
Data Type:	xbrli:integerItemType
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_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The gain (loss) recognised in other comprehensive income on hedge ineffectiveness. [Refer: Gain (loss) on hedge ineffectiveness]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 24C
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24C_a_i&doctype=Standard
-URIDate 2018-03-16

+ Details

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

X

- Definition

The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 24C
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24C_b_i&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 24E
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24E_a&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 91
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_91_a&doctype=Standard
-URIDate 2018-03-16

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 23
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_23_c&doctype=Standard&book=b
-URIDate 2018-03-16

+ Details

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

X

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CommodityPriceRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	abx_NonhedgingInstrumentsAxis=abx_FuelContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	abx_NonhedgingInstrumentsAxis=abx_GoldCollarSellContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	abx_NonhedgingInstrumentsAxis=abx_GoldPositionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfHedgesAxis=ifrs-full_CashFlowHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=ifrs-full_InterestRateSwapContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=ifrs-full_CurrencySwapContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=abx_FuelContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=abx_WTIFuelContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=abx_SilverCommodityContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=abx_CopperBoughtFloorContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	abx_DerivativePositionAxis=abx_NetAssetPositionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	abx_DerivativePositionAxis=abx_NetLiabilityPositionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: