XML 150 R110.htm IDEA: XBRL DOCUMENT
v3.20.4

SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Details) oz in Millions, lb in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 lb oz $ / oz $ / lb
Copper |
Estimated Recoverable Proven And Probable Reserves | 117,200
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb | 2.50
Three Year Average Price | $ / lb | 2.83
Gold |
Estimated Recoverable Proven And Probable Reserves | oz | 28.9
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz | 1,200
Three Year Average Price | $ / oz | 1,477
Molybdenum |
Estimated Recoverable Proven And Probable Reserves | 3,770
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb | 10
Three Year Average Price | $ / lb | 10.65
Silver |
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz | 15
Consolidated Basis [Member] | Copper |
Estimated Recoverable Proven And Probable Reserves | 113,200
Consolidated Basis [Member] | Gold |
Estimated Recoverable Proven And Probable Reserves | oz | 28.9
Consolidated Basis [Member] | Molybdenum |
Estimated Recoverable Proven And Probable Reserves | 3,710
Consolidated Basis [Member] | Silver |
Estimated Recoverable Proven And Probable Reserves | oz | 362.0
Consolidated Basis [Member] | Indonesia | Copper |
Estimated Recoverable Proven And Probable Reserves | 33,400
Consolidated Basis [Member] | Indonesia | Gold |
Estimated Recoverable Proven And Probable Reserves | oz | 28.3
Consolidated Basis [Member] | Indonesia | Molybdenum |
Estimated Recoverable Proven And Probable Reserves | 0

X
- Definition Estimated Recoverable Proven And Probable Reserves + References No definition available. + Details
Name: | fcx_EstimatedRecoverableProvenAndProbableReserves
Namespace Prefix: | fcx_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Long Term Average Price Used To Estimate Recoverable Reserves Per Unit. + References No definition available. + Details
Name: | fcx_LongTermAveragePriceUsedToEstimateRecoverableReserves
Namespace Prefix: | fcx_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Three Year Average Price + References No definition available. + Details
Name: | fcx_ThreeYearAveragePrice
Namespace Prefix: | fcx_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=fcx_CopperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=us-gaap_GoldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=fcx_MolybdenumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=fcx_SilverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fcx_OreAverageOreGradesAndRecoverableProvenAndProbableReservesByOwnershipBasisAxis=fcx_ConsolidatedBasisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_ID
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |