XML 43 R26.htm IDEA: XBRL DOCUMENT
v3.21.2

Inventories, Including Long-Term Mill and Leach Stockpiles - Additional Information (Details) $ / shares in Units, pounds in Millions, $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 01, 2021 pounds | Sep. 30, 2021 USD ($) $ / shares | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) $ / shares | Sep. 30, 2020 USD ($)
Inventory [Line Items] |  |  |  |  |
Metals inventory adjustments |  | $ 14 | $ 9 | $ 15 | $ 92
Increase in recoverable copper in leach stockpiles | pounds | 191 |  |  |  |
Increase in net income as a result of increased recoverable inventory |  | $ 52 |  | $ 52 |
Increase in earnings per share as a result of increased recoverable inventory | $ / shares |  | $ 0.04 |  | $ 0.04 |
Molybdenum |  |  |  |  |
Inventory [Line Items] |  |  |  |  |
Metals inventory adjustments |  |  |  |  | 34
Copper |  |  |  |  |
Inventory [Line Items] |  |  |  |  |
Metals inventory adjustments |  |  |  |  | $ 58

X
- Definition Increase in Earnings per Share as a Result of Increased Recoverable Inventory + References No definition available. + Details
Name: | fcx_IncreaseInEarningsPerShareAsAResultOfIncreasedRecoverableInventory
Namespace Prefix: | fcx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in Net Income as a Result of Increased Recoverable Inventory + References No definition available. + Details
Name: | fcx_IncreaseInNetIncomeAsAResultOfIncreasedRecoverableInventory
Namespace Prefix: | fcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase in Recoverable Copper in Leach Stockpiles + References No definition available. + Details
Name: | fcx_IncreaseInRecoverableCopperInLeachStockpiles
Namespace Prefix: | fcx_
Data Type: | num:weightItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inventory Adjustment + References No definition available. + Details
Name: | fcx_InventoryAdjustment
Namespace Prefix: | fcx_
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_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=fcx_MolybdenumMember
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: |