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v2.4.1.9

OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 lb | Dec. 31, 2022 | Dec. 31, 2013 | Dec. 31, 1994 lb
Summary of investment holdings [Line Items] |  |  |  |
Retained earnings (accumulated deficit) of subsidiary | $ 128 us-gaap_RetainedEarningsAccumulatedDeficit |  | $ 2,742 us-gaap_RetainedEarningsAccumulatedDeficit |
Morenci [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Percentage of undivided interest owned by company | 85.00%fcx_PercentageOfUndividedInterestOwnedByCompany / dei_LegalEntityAxis = fcx_MorenciMember |  |  |
Other North America Mines [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 100.00%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_OtherMinesNorthAmericaCopperMinesSegmentsMember |  |  |
Cerro Verde [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 53.56%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_CerroVerdeSouthAmericaSegmentsMember |  |  |
El Abra [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 51.00%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_ElAbraOtherSouthAmericaSegmentsMember |  |  |
Tenke [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 56.00%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_TenkeSegmentsMember |  |  |
Freeport-McMoRan Corporation [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Net assets (liabilities) in subsidiary | 19,600 us-gaap_AssetsNet / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |  |  |
Retained earnings (accumulated deficit) of subsidiary | (9,700)us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |  |  |
FCX loans outstanding | 0 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |  |  |
Number of pounds of copper purchased from Sumitomo (in pounds) | 82,000,000 fcx_NumberOfPoundsOfCopperPurchasedFromJointVenturePartner / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |  |  |
Dollar value of pounds purchased from Sumitomo | 257 fcx_DollarValueOfPoundsPurchasedFromJointVenturePartner / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |  |  |
Net receivable from Sumitomo | 11 fcx_NetReceivableDueFromJointVenture / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |  | 12 fcx_NetReceivableDueFromJointVenture / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryFmcMember |
PT Freeport Indonesia [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 81.28%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
Net assets (liabilities) in subsidiary | 5,400 us-gaap_AssetsNet / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
Retained earnings (accumulated deficit) of subsidiary | 5,200 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
FCX loans outstanding | 213 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
Percent interest in certain assets and future production per terms of the joint venture agreement | 60.00%fcx_JointVentureInterestInAssetsAndProduction / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
Percentage of cash flows from specified annual amounts of copper, gold and silver calculated by reference to proven and probable reserves as of 12/31/1994 (in hundredths) | 100.00%fcx_PercentageOfCashFlowsForSpecifiedAnnualAmountsOfCopperAndGold / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
Percentage of remaining cash flows | 60.00%fcx_PercentageOfRemainingCashFlows / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
Percentage of optional participation of any other future exploration costs shared by joint venture | 60.00%fcx_ParticipationOfExpansionCapitalCostsSharedByJointVenturePercentage / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember |  |  |
PT Indocopper Investama [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 100.00%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtIndocopperInvestamaMember |  |  |
Company's indirect ownership percentage of a subsidiary through another wholly owned subsidiary | 9.36%fcx_CompanyIndirectOwnershipPercentageOfSubsidiaryThroughAnotherWhollyOwnedSubsidiary / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtIndocopperInvestamaMember |  |  |
Atlantic Copper [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 100.00%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryAtlanticCopperMember |  |  |
Net assets (liabilities) in subsidiary | (145)us-gaap_AssetsNet / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryAtlanticCopperMember |  |  |
Retained earnings (accumulated deficit) of subsidiary | (552)us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryAtlanticCopperMember |  |  |
FCX loans outstanding | 579 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryAtlanticCopperMember |  |  |
Freeport-McMoRan Oil & Gas [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Company's direct ownership percentage | 100.00%us-gaap_InvestmentOwnedPercentOfNetAssets / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Net assets (liabilities) in subsidiary | 7,200 us-gaap_AssetsNet / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Retained earnings (accumulated deficit) of subsidiary | (4,400)us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
FCX loans outstanding | 4,600 us-gaap_RelatedPartyTransactionDueFromToRelatedParty / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Rio Tinto Share In Joint Venture [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Percentage interest in joint venture contract of work by third party | 40.00%fcx_PercentageInterestByJointVentureInContractsOfWork / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember |  |  |
Optional Participation Of Future Exploration Costs Shared By Joint Venture Percentage | 40.00%fcx_OptionalParticipationOfFutureExplorationCostsSharedByJointVenturePercentage / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember |  |  |
Percent interest in certain assets and future production per terms of the joint venture agreement | 40.00%fcx_JointVentureInterestInAssetsAndProduction / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember | 40.00%fcx_JointVentureInterestInAssetsAndProduction / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember |  |
Percentage of optional participation of any other future exploration costs shared by joint venture | 40.00%fcx_ParticipationOfExpansionCapitalCostsSharedByJointVenturePercentage / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember |  |  |
Rio Tinto's share of joint venture cash flows | $ 29 fcx_JointVenturePartnerShareOfCashFlows / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember |  | $ 33 fcx_JointVenturePartnerShareOfCashFlows / dei_LegalEntityAxis = fcx_RioTintoShareInJointVentureMember |
Sumitomo's Share in Joint Venture [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Percentage of undivided interest owned by third party | 15.00%fcx_PercentOfUndividedInterestOwnedByThirdParty / dei_LegalEntityAxis = fcx_SumitomoShareInJointVentureMember |  |  |
Copper [Member] | PT Freeport Indonesia [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) |  |  |  | 27,100,000,000 fcx_EstimatedRecoverableProvenAndProbableReserves / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember / fcx_MineralTypeAxis = fcx_CopperMember
Gold [Member] | PT Freeport Indonesia [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) |  |  |  | 38,400,000 fcx_EstimatedRecoverableProvenAndProbableReserves / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember / fcx_MineralTypeAxis = fcx_GoldMember
Silver (ounces) [Member] | PT Freeport Indonesia [Member] |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) |  |  |  | 75,800,000 fcx_EstimatedRecoverableProvenAndProbableReserves / dei_LegalEntityAxis = fcx_InvestmentInSubsidiaryPtFreeportIndonesiaMember / fcx_MineralTypeAxis = fcx_SilverMember

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