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v2.4.1.9

Financial Instruments (Unaudited) Not Designated as Hedging Instruments (Details) | 3 Months Ended
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Mar. 31, 2015 lb
Embedded derivatives in provisional sales contracts - Copper [Member] | Derivatives not designated as hedging instruments [Member] |
Derivative [Line Items] |
Open positions (in lbs except gold in oz) | 577,000,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalSalesContractsCopperMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Average contract price | 2.75 us-gaap_DerivativeAverageForwardPrice / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalSalesContractsCopperMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Average market price | 2.74 fcx_DerivativeAverageMarketPrice / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalSalesContractsCopperMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Maturities through | September 2015
Embedded derivatives in provisional sales contracts - Gold [Member] | Derivatives not designated as hedging instruments [Member] |
Derivative [Line Items] |
Open positions (in lbs except gold in oz) | 155,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalSalesContractsGoldMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Average contract price | 1,195 us-gaap_DerivativeAverageForwardPrice / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalSalesContractsGoldMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Average market price | 1,183 fcx_DerivativeAverageMarketPrice / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalSalesContractsGoldMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Maturities through | July 2015
Embedded derivatives in provisional purchase contracts - Copper [Member] | Derivatives not designated as hedging instruments [Member] |
Derivative [Line Items] |
Open positions (in lbs except gold in oz) | 126,000,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalPurchaseContractsCopperMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Average contract price | 2.68 us-gaap_DerivativeAverageForwardPrice / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalPurchaseContractsCopperMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Average market price | 2.75 fcx_DerivativeAverageMarketPrice / us-gaap_DerivativeInstrumentRiskAxis = fcx_EmbeddedDerivativesInProvisionalPurchaseContractsCopperMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Maturities through | July 2015
Atlantic Copper [Member] | Copper forward contracts [Member] | Derivatives not designated as hedging instruments [Member] |
Derivative [Line Items] |
Open positions (in lbs except gold in oz) | 36,000,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / dei_LegalEntityAxis = fcx_AtlanticCopperMember
Average contract price | 2.68 us-gaap_DerivativeAverageForwardPrice / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / dei_LegalEntityAxis = fcx_AtlanticCopperMember
Maturities through | May 2015
Copper futures and swap contracts [Member] | Fair Value Hedging [Member] | Derivatives designated as hedging instruments [Member] |
Derivative [Line Items] |
Open positions (in lbs except gold in oz) | 55,000,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_FairValueHedgingMember / us-gaap_FinancialInstrumentAxis = fcx_FmcsCopperFuturesAndSwapContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Average contract price | 2.75 us-gaap_DerivativeAverageForwardPrice / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_FairValueHedgingMember / us-gaap_FinancialInstrumentAxis = fcx_FmcsCopperFuturesAndSwapContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Maturities through | December 2016

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- Definition The average market price for a group of price risk forward or futures contracts, such as gas futures contracts. + References No definition available. + Details
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Namespace Prefix: | fcx_
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Balance Type: | na
Period Type: | instant

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- Definition The month of the latest date the derivative matures. + References No definition available. + Details
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Namespace Prefix: | fcx_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

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- 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
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- Definition The average forward price on the group of price risk forward or futures contracts, such as gas futures contracts. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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- Details
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- Details
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- Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Data Type: | na
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