XML 129 R89.htm IDEA: XBRL DOCUMENT
v3.20.4

CONTINGENCIES (Tax Matters by Tax Year) (Details) - USD ($) $ in Millions | 12 Months Ended | 21 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 21, 2018
Income Tax Examination [Line Items] |  |  |  |
Income Taxes Receivable, Noncurrent | $ 106 | $ 290 |  |
Export Duties Expense | $ 92 | 221 | $ 180 |
PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Progressive export duty on copper concentrates, higher threshold, percent | 5.00% |  |  | 7.50%
Export Duties Expense | $ 92 | 66 | $ 180 |
SUNAT | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Income Taxes Receivable, Noncurrent | 433 |  |  |
Tax Assessment | 295 |  |  |
Penalty and Interest Assessment | 443 |  |  |
Total | 738 |  |  |
SUNAT | 2003 to 2008 | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 50 |  |  |
Penalty and Interest Assessment | 129 |  |  |
Total | 179 |  |  |
SUNAT | 2009 | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 56 |  |  |
Penalty and Interest Assessment | 52 |  |  |
Total | 108 |  |  |
SUNAT | 2010 | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 54 |  |  |
Penalty and Interest Assessment | 118 |  |  |
Total | 172 |  |  |
SUNAT | 2011 | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 42 |  |  |
Penalty and Interest Assessment | 78 |  |  |
Total | 120 |  |  |
SUNAT | 2014 to 2020 | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 45 |  |  |
Penalty and Interest Assessment | 0 |  |  |
Total | 45 |  |  |
SUNAT | 2013 | Cerro Verde |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 48 |  |  |
Penalty and Interest Assessment | 66 |  |  |
Total | 114 |  |  |
Indonesia Tax Authority | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 969 |  |  |
Interest Assessment | 269 |  |  |
Total | 1,238 |  |  |
Indonesia Tax Authority | 2012 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 97 |  |  |
Interest Assessment | 0 |  |  |
Total | 97 |  |  |
Indonesia Tax Authority | 2005 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 62 |  |  |
Interest Assessment | 30 |  |  |
Total | 92 |  |  |
Indonesia Tax Authority | 2007 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 48 |  |  |
Interest Assessment | 23 |  |  |
Total | 71 |  |  |
Indonesia Tax Authority | 2009, 2010 to 2011 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 31 |  |  |
Interest Assessment | 8 |  |  |
Total | 39 |  |  |
Indonesia Tax Authority | 2013 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 152 |  |  |
Interest Assessment | 76 |  |  |
Total | 228 |  |  |
Indonesia Tax Authority | 2014 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 123 |  |  |
Interest Assessment | 0 |  |  |
Total | 123 |  |  |
Indonesia Tax Authority | 2015 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 159 |  |  |
Interest Assessment | 0 |  |  |
Total | 159 |  |  |
Indonesia Tax Authority | 2016 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 257 |  |  |
Interest Assessment | 113 |  |  |
Total | 370 |  |  |
Indonesia Tax Authority | 2017 | PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax Assessment | 40 |  |  |
Interest Assessment | 19 |  |  |
Total | 59 |  |  |
PT-FI |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Income Taxes Receivable, Noncurrent | $ 143 | $ 178 |  |

X
- Definition Amount of expense related to export duty payments under a contractual arrangement such as payment for mineral exports. + References No definition available. + Details
Name: | fcx_ExportDutiesExpense
Namespace Prefix: | fcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Income Tax Examination, Tax Assessment + References No definition available. + Details
Name: | fcx_IncomeTaxExaminationTaxAssessment
Namespace Prefix: | fcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The progressive export duty on copper concentrates expressed as a percentage for higher threshold. + References No definition available. + Details
Name: | fcx_ProgressiveExportDutyonCopperConcentratesHigherThresholdPercent
Namespace Prefix: | fcx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of estimated interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_IncomeTaxExaminationInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
Name: | us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IncomeTaxExaminationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)(c)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
Name: | us-gaap_IncomeTaxesReceivableNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=fcx_PtFreeportIndonesiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=fcx_NationalSuperintendencyofTaxAdministrationSUNATMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=fcx_CerroVerdeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=fcx_TaxYear2003toTaxYear2008Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2009Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=fcx_TaxYear2014ToTaxYear2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=fcx_IndonesianTaxAuthorityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=fcx_RelatingTo2005Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2007Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=fcx_TaxYear20082010toTaxYear2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=fcx_PtFreeportIndonesiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |