XML 103 R62.htm IDEA: XBRL DOCUMENT
v3.8.0.1

PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) $ / lb | Dec. 31, 2017 $ / lb | Dec. 31, 2016 $ / lb
Tyrone [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment of Long-Lived Assets Held-for-use | $ | $ 37 |  |
Copper |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Asset Impairment Evaluation, Average Price Assumption (Dollars per Pound) | 3.00 |  |
Average Price | 2.13 | 3.25 | 2.50
Molybdenum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Asset Impairment Evaluation, Average Price Assumption (Dollars per Pound) | 10.00 |  |
Average Price | 5.23 | 10.15 | 6.74
CME SWAPS MARKETS (COMEX) [Member] | Copper | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Asset Impairment Evaluation, Average Price Assumption (Dollars per Pound) | 2.15 |  |
CME SWAPS MARKETS (COMEX) [Member] | Copper | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Asset Impairment Evaluation, Average Price Assumption (Dollars per Pound) | 2.17 |  |
LONDON METAL EXCHANGE [Member] | Copper | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Asset Impairment Evaluation, Average Price Assumption (Dollars per Pound) | 2.13 |  |
LONDON METAL EXCHANGE [Member] | Copper | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Asset Impairment Evaluation, Average Price Assumption (Dollars per Pound) | 2.16 |  |

X
- Definition Average commodity price used to evaluate long-lived asset for impairment (in dollars per pound). + References No definition available. + Details
Name: | fcx_AssetImpairmentEvaluationAveragePriceAssumptionDollarsperPound
Namespace Prefix: | fcx_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average Price + References No definition available. + Details
Name: | fcx_AveragePrice
Namespace Prefix: | fcx_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84241808&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=fcx_TyroneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | dei_EntityListingsExchangeAxis=exch_CECS
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityListingsExchangeAxis=exch_XLME
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |