XML 47 R30.htm IDEA: XBRL DOCUMENT
v3.21.2

Financial Instruments (Unrealized gains losses) (Details) oz in Thousands, lb in Millions, $ in Millions | 1 Months Ended | 2 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 30, 2020 lb | Jun. 30, 2020 | Sep. 30, 2021 USD ($) $ / lb $ / oz $ / lb | Sep. 30, 2020 USD ($) $ / lb | Jun. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) oz lb $ / lb $ / oz $ / lb | Sep. 30, 2020 USD ($) $ / lb
North America |  |  |  |  |  |  |
Realized gains (losses): |  |  |  |  |  |  |
Percent of Copper Sale Volume |  | 60.00% |  |  |  |  |
Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |  |  |  |  |
Realized gains (losses): |  |  |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  |  | $ (111) | $ 109 |  | $ 201 | $ 57
Commodity Contract [Member] |  |  |  |  |  |  |
Unrealized gains (losses): |  |  |  |  |  |  |
Derivative financial instruments |  |  | (20) | 1 |  | (28) | 8
Hedged item – firm sales commitments |  |  | 20 | (1) |  | 28 | (8)
Realized gains (losses): |  |  |  |  |  |  |
Matured derivative financial instruments |  |  | $ 5 | $ 15 |  | $ 57 | $ (1)
Commodity Contract [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  |  |  | 84 |
Derivative, Average Forward Price | $ / lb |  |  | 4.23 |  |  | 4.23 |
Copper Forward Contracts [Member] |  |  |  |  |  |  |
Unrealized gains (losses): |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  | $ 24 |  |
Realized gains (losses): |  |  |  |  |  |  |
Derivative, Forward Price | $ / lb |  |  |  | 2.34 |  |  | 2.34
Copper Forward Contracts [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 150 |  |  |  |  |  |
Copper Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  |  |  | 9 |
Derivative, Average Forward Price | $ / lb |  |  | 4.23 |  |  | 4.23 |
Copper Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Amounts recorded in Cost of Sales |  |  |  |  |  |  |
Realized gains (losses): |  |  |  |  |  |  |
Matured derivative financial instruments |  |  | $ 1 | $ (7) |  | $ (12) | $ 12
Copper | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |  |  |  |  |
Realized gains (losses): |  |  |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  |  | $ (102) | 94 |  | $ 223 | 18
Copper | Short [Member] | Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  |  |  | 548 |
Derivative, Average Forward Price | $ / lb |  |  | 4.28 |  |  | 4.28 |
Realized gains (losses): |  |  |  |  |  |  |
Derivative Average Market Price | $ / lb |  |  | 4.05 |  |  | 4.05 |
Copper | Long [Member] | Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  |  |  | 116 |
Derivative, Average Forward Price | $ / lb |  |  | 4.31 |  |  | 4.31 |
Realized gains (losses): |  |  |  |  |  |  |
Derivative Average Market Price | $ / lb |  |  | 4.05 |  |  | 4.05 |
Gold | Short [Member] | Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | oz |  |  |  |  |  | 196 |
Derivative, Average Forward Price | $ / oz |  |  | 1,790 |  |  | 1,790 |
Realized gains (losses): |  |  |  |  |  |  |
Derivative Average Market Price | $ / oz |  |  | 1,738 |  |  | 1,738 |
gold and other | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |  |  |  |  |
Realized gains (losses): |  |  |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  |  | $ (9) | $ 15 |  | $ (22) | $ 39

X
- Definition The average market price for a group of price risk forward or futures contracts, such as gas futures contracts. + References No definition available. + Details
Name: | fcx_DerivativeAverageMarketPrice
Namespace Prefix: | fcx_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percent of Copper Sale Volume + References No definition available. + Details
Name: | fcx_PercentOfCopperSaleVolume
Namespace Prefix: | fcx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
Name: | us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
Name: | us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The average forward price on the group of price risk forward or futures contracts, such as gas futures contracts. + References No definition available. + Details
Name: | us-gaap_DerivativeAverageForwardPrice
Namespace Prefix: | us-gaap_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition The forward price on the price risk forward or futures contract, such as a gas futures contract. + References No definition available. + Details
Name: | us-gaap_DerivativeForwardPrice
Namespace Prefix: | us-gaap_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal mass used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountMass
Namespace Prefix: | us-gaap_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 15 -URI http://asc.fasb.org/subtopic&trid=2229187 + Details
Name: | us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_HeldToMaturitySecuritiesGrossGainsLossesDerivativesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContractsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_EmbeddedDerivativeFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_LongMember
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_GoldandotherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |