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GUARANTOR FINANCIAL STATEMENTS (Condensed Consolidating Comprehensive (Loss) Income Statement) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Condensed Comprehensive (Loss) Income Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 5,235 us-gaap_SalesRevenueNet | [1] | $ 5,696 us-gaap_SalesRevenueNet | [1] | $ 5,522 us-gaap_SalesRevenueNet | [1] | $ 4,985 us-gaap_SalesRevenueNet | [1] | $ 5,885 us-gaap_SalesRevenueNet | [2] | $ 6,165 us-gaap_SalesRevenueNet | [2] | $ 4,288 us-gaap_SalesRevenueNet | [2] | $ 4,583 us-gaap_SalesRevenueNet |  | $ 21,438 us-gaap_SalesRevenueNet | [1],[3] | $ 20,921 us-gaap_SalesRevenueNet | [2],[3] | $ 18,010 us-gaap_SalesRevenueNet | [3]
Total costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,341 us-gaap_CostsAndExpenses |  | 15,570 us-gaap_CostsAndExpenses |  | 12,196 us-gaap_CostsAndExpenses |
Operating income | (3,299)us-gaap_OperatingIncomeLoss | [4],[5] | 1,132 us-gaap_OperatingIncomeLoss | [4],[5] | 1,153 us-gaap_OperatingIncomeLoss |  | 1,111 us-gaap_OperatingIncomeLoss |  | 1,650 us-gaap_OperatingIncomeLoss | [6],[7] | 1,707 us-gaap_OperatingIncomeLoss | [6] | 639 us-gaap_OperatingIncomeLoss | [6] | 1,355 us-gaap_OperatingIncomeLoss | [6] | 97 us-gaap_OperatingIncomeLoss | [4],[5] | 5,351 us-gaap_OperatingIncomeLoss | [6],[7] | 5,814 us-gaap_OperatingIncomeLoss |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (630)fcx_InterestExpenseIncludingAccretion |  | (518)fcx_InterestExpenseIncludingAccretion |  | (186)fcx_InterestExpenseIncludingAccretion |
Net gain (loss) on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73 us-gaap_GainsLossesOnExtinguishmentOfDebt |  | (35)us-gaap_GainsLossesOnExtinguishmentOfDebt |  | (168)us-gaap_GainsLossesOnExtinguishmentOfDebt |
Gain on investment in McMoRan Exploration Co. (MMR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain |  | 128 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain |  | 0 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36 us-gaap_NonoperatingIncomeExpense |  | (13)us-gaap_NonoperatingIncomeExpense |  |  |
(Loss) income before income taxes and equity in affiliated companies' net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (424)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  | 4,913 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  | 5,487 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
Benefit from (provision for) income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (324)us-gaap_IncomeTaxExpenseBenefit | [8],[9] | (1,475)us-gaap_IncomeTaxExpenseBenefit | [10] | (1,510)us-gaap_IncomeTaxExpenseBenefit | [11]
Equity in affiliated companies’ net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 us-gaap_IncomeLossFromEquityMethodInvestments |  | 3 us-gaap_IncomeLossFromEquityMethodInvestments |  | 3 us-gaap_IncomeLossFromEquityMethodInvestments |
Net (loss) income | (2,735)us-gaap_ProfitLoss | [12],[13] | 704 us-gaap_ProfitLoss | [12],[13] | 660 us-gaap_ProfitLoss | [12],[13] | 626 us-gaap_ProfitLoss |  | 959 us-gaap_ProfitLoss | [14] | 1,048 us-gaap_ProfitLoss |  | 610 us-gaap_ProfitLoss | [14] | 824 us-gaap_ProfitLoss |  | (745)us-gaap_ProfitLoss | [12],[13] | 3,441 us-gaap_ProfitLoss | [14] | 3,980 us-gaap_ProfitLoss |
Net income and preferred dividends attributable to noncontrolling interests | (117)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (152)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (178)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (116)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (252)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (227)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (128)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (176)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (563)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  | (783)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends |  |  |
Net (loss) income attributable to FCX common stockholders | (2,852)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [1],[12],[13],[4],[5] | 552 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [1],[12],[13],[4],[5] | 482 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [1],[12],[13] | 510 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [1] | 707 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [14],[15],[2],[6],[7] | 821 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [2],[6] | 482 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [14],[15],[16],[2],[6] | 648 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [15],[6] | (1,308)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [1],[12],[13],[4],[5] | 2,658 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | [14],[15],[16],[2],[6],[7] | 3,041 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (139)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  | 101 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  |  |
Total comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,447)us-gaap_ComprehensiveIncomeNetOfTax |  | 2,759 us-gaap_ComprehensiveIncomeNetOfTax |  | 3,000 us-gaap_ComprehensiveIncomeNetOfTax |
Impairment of oil and gas properties and goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,454 fcx_Impairments |  |  |  |  |
FCX Issuer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Comprehensive (Loss) Income Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Total costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 59 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 134 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (59)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (134)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (382)fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (319)fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Net gain (loss) on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5)us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (45)us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Gain on investment in McMoRan Exploration Co. (MMR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 128 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 72 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 61 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
(Loss) income before income taxes and equity in affiliated companies' net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (374)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (309)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Benefit from (provision for) income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 81 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Equity in affiliated companies’ net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,007)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 2,886 us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,308)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 2,658 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Net income and preferred dividends attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 0 fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Net (loss) income attributable to FCX common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,308)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 2,658 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Total comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,308)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 2,658 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |
Impairment of oil and gas properties and goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 fcx_Impairments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |  |  |
FM O&G LLC Guarantor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Comprehensive (Loss) Income Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,356 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 1,177 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Total costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,498 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember | [17] | 1,065 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,142)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 112 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (139)fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | (129)fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Net gain (loss) on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 78 us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Gain on investment in McMoRan Exploration Co. (MMR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 0 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
(Loss) income before income taxes and equity in affiliated companies' net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,200)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | (17)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Benefit from (provision for) income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 281 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 17 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Equity in affiliated companies’ net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,429)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 281 us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,348)us-gaap_ProfitLoss / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 281 us-gaap_ProfitLoss / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Net income and preferred dividends attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 0 fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Net (loss) income attributable to FCX common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,348)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 281 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Total comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,348)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  | 281 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |
Impairment of oil and gas properties and goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,922 fcx_Impairments / dei_LegalEntityAxis = fcx_FreeportMcMoRanOilGasMember |  |  |  |  |
Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Comprehensive (Loss) Income Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,082 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 19,744 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Total costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,762 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | [17] | 14,371 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,320 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 5,373 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (189)fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (129)fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Net gain (loss) on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 10 us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Gain on investment in McMoRan Exploration Co. (MMR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 41 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (15)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
(Loss) income before income taxes and equity in affiliated companies' net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,172 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 5,239 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Benefit from (provision for) income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (686)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (1,573)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Equity in affiliated companies’ net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,633)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 268 us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,147)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 3,934 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Net income and preferred dividends attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (519)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | (706)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Net (loss) income attributable to FCX common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,666)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 3,228 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (139)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 101 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Total comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,805)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  | 3,329 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |
Impairment of oil and gas properties and goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,486 fcx_Impairments / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |  |  |
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Comprehensive (Loss) Income Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Total costs and expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_CostsAndExpenses / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (22)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80 fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 59 fcx_InterestExpenseIncludingAccretion / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Net gain (loss) on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Gain on investment in McMoRan Exploration Co. (MMR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (80)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (59)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
(Loss) income before income taxes and equity in affiliated companies' net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (22)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Benefit from (provision for) income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Equity in affiliated companies’ net earnings (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,072 us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (3,432)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Net (loss) income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,058 us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (3,432)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Net income and preferred dividends attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (44)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (77)fcx_NetIncomeLossAttributabletoNoncontrollingInterestsandPreferredDividends / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Net (loss) income attributable to FCX common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,014 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (3,509)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Total comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,014 us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  | (3,509)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |
Impairment of oil and gas properties and goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 46 fcx_Impairments / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
[1] | Includes credits (charges) of $15 million ($9 million to net income attributable to common stockholders or $0.01 per share) in the first quarter, $(7) million ($(4) million to net income attributable to common stockholders) in the second quarter, $122 million ($76 million to net income attributable to common stockholders or $0.07 per share) in the third quarter, $497 million ($309 million to net loss attributable to common stockholders or $0.30 per share) in the fourth quarter and $627 million ($389 million to net loss attributable to common stockholders or $0.37 per share) for the year for net unrealized and noncash realized gains (losses) on crude oil and natural gas derivative contracts.
[2] | Includes charges of $36 million ($23 million to net income attributable to common stockholders or $0.02 per share) in the second quarter, $158 million ($98 million to net income attributable to common stockholders or $0.09 per share) in the third quarter, $118 million ($73 million to net income attributable to common stockholders or $0.07 per share) in the fourth quarter and $312 million ($194 million to net income attributable to common stockholders or $0.19 per share) for the year (reflecting the seven-month period from June 1, 2013, to December 31, 2013) for unrealized and noncash realized losses on crude oil and natural gas derivative contracts.
[3] | Revenues are attributed to countries based on the location of the customer.
[4] | Includes net gains of $46 million ($31 million to net income attributable to common stockholders or $0.03 per share) in third quarter, $671 million ($450 million to net loss attributable to common stockholders or $0.43 per share) in the fourth quarter and $717 million ($481 million to net loss attributable to common stockholders or $0.46 per share) for the year primarily from the sale of the Candelaria and Ojos del Salado copper mining operations in the fourth quarter (refer to Note 2 for further discussion) and the sale of a metals injection molding plant in the third quarter.
[5] | Includes a charge of $308 million ($192 million to net income attributable to common stockholders or $0.18 per share) in the third quarter, $3.4 billion ($2.1 billion to net loss attributable to common stockholders or $2.05 per share) in the fourth quarter and $3.7 billion ($2.3 billion to net loss attributable to common stockholders or $2.24 per share) for the year to reduce the carrying value of oil and gas properties pursuant to full cost accounting rules. Additionally, the fourth quarter and the year includes a goodwill impairment charge of $1.7 billion ($1.65 per share) for the full carrying value of goodwill.
[6] | Includes charges of $14 million ($10 million to net income attributable to common stockholders or $0.01 per share) in the first quarter, $61 million ($36 million to net income attributable to common stockholders or $0.04 per share) in the second quarter, $1 million ($1 million to net income attributable to common stockholders) in the third quarter, $4 million ($3 million to net income attributable to common stockholders) in the fourth quarter and $80 million ($50 million to net income attributable to common stockholders or $0.05 per share) for the year for transaction and related costs principally associated with the acquisitions of PXP and MMR.
[7] | Includes charges in the fourth quarter and for the year of (i) $76 million ($49 million to net income attributable to common stockholders or $0.05 per share) associated with updated mine plans at Morenci that resulted in a loss in recoverable copper in leach stockpiles, (ii) $37 million ($23 million to net income attributable to common stockholders or $0.02 per share) associated with the restructuring of an executive employment arrangement and (iii) $36 million ($13 million to net income attributable to common stockholders or $0.01 per share) associated with a new labor agreement at Cerro Verde.
[8] | Includes charges related to changes in Chilean and Peruvian tax rules of $54 million and $24 million, respectively.
[9] | Includes a net charge of $221 million related to the sale of Candelaria/Ojos.
[10] | Includes a net tax benefit of $199 million as a result of the oil and gas acquisitions.
[11] | Includes the reversal of Cerro Verde's deferred income tax liability of $234 million.
[12] | Includes a tax charge of $57 million ($0.06 per share) in the second quarter, $5 million in the third quarter, $22 million ($0.02 per share) in the fourth quarter and $84 million ($0.08 per share) for the year associated with deferred taxes recorded in connection with the allocation of goodwill to the sale of the Eagle Ford properties. Additionally, includes a net tax charge (benefit) of $54 million ($7 million attributable to noncontrolling interests and $47 million to net income attributable to common stockholders or $0.04 per share) in the third quarter, $(17) million ($11 million attributable to noncontrolling interests and $(28) million to net loss attributable to common stockholders or $(0.03) per share) in the fourth quarter and $37 million ($18 million attributable to noncontrolling interests and $19 million to net loss attributable to common stockholders or $0.02 per share) for the year associated with changes in Chilean tax rules, U.S. federal income tax regulations and Peruvian tax rules, partially offset by a tax benefit related to changes in U.S. state income tax filing positions.
[13] | Includes net gains (losses) on early extinguishment of debt totaling $4 million in the second quarter, $17 million ($0.02 per share) in the third quarter, $(18) million ($(0.02) per share) in the fourth quarter and $3 million for the year. Refer to Note 8 for further discussion.
[14] | Includes a net tax benefit of $183 million ($0.19 per share) in the second quarter, $16 million ($0.01 per share) in the fourth quarter and $199 million ($0.20 per share) for the year associated with net reductions in FCX's deferred tax liabilities and deferred tax asset valuation allowances related to the acquisitions of PXP and MMR.
[15] | Includes net (losses) gains on early extinguishment of debt totaling $(40) million ($(0.04) per share) in the first quarter, $5 million ($0.01 per share) in the second quarter for an adjustment related to taxes on the first quarter losses, $7 million ($0.01 per share) in the fourth quarter and $(28) million ($(0.03) per share) for the year. Refer to Note 8 for further discussion.
[16] | Includes a gain of $128 million ($0.13 per share) in the second quarter and for the year related to FCX's preferred stock investment in and the subsequent acquisition of MMR. Refer to Note 2 for further discussion.
[17] | Includes impairment charges totaling $1.9 billion at the FM O&G LLC Guarantor and $3.5 billion at the non-guarantor subsidiaries related to ceiling test impairment charges for FCX's oil and gas properties pursuant to full cost accounting rules and a goodwill impairment charge.

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