XML 35 R21.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Inventories, Including Long-Term Mill and Leach Stockpiles (Unaudited) (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2016
Inventories, Including Long Term Mill and Leach Stockpiles [Abstract] |
Schedule of Inventory [Table Text Block] | The components of inventories follow (in millions):
| March 31, 2016 |  | December 31, 2015 |
Current inventories: |  |  |  |
Mill stockpiles | $ | 139 |  |  | $ | 137 |  |
Leach stockpiles | 1,317 |  |  | 1,402 |  |
Total current mill and leach stockpiles | $ | 1,456 |  |  | $ | 1,539 |  |
Total materials and supplies, net a | $ | 1,445 |  |  | $ | 1,594 |  |
Raw materials (primarily concentrate) | $ | 247 |  |  | $ | 220 |  |
Work-in-process | 118 |  |  | 108 |  |
Finished goods | 709 |  |  | 743 |  |
Total product inventories | $ | 1,074 |  |  | $ | 1,071 |  |
Long-term inventories: |  |  |  |
Mill stockpiles | $ | 521 |  |  | $ | 480 |  |
Leach stockpiles | 1,182 |  |  | 1,183 |  |
Total long-term mill and leach stockpiles b | $ | 1,703 |  |  | $ | 1,663 |  |
a. | Materials and supplies inventory was net of obsolescence reserves totaling $27 million at March 31, 2016, and $26 million at December 31, 2015.
b. | Estimated metals in stockpiles not expected to be recovered within the next 12 months.

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | fcx_InventoriesIncludingLongTermMillAndLeachStockpilesAbstract
Namespace Prefix: | fcx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for sale or to be used in manufacturing, servicing or production process. + References No definition available. + Details
Name: | fcx_ScheduleofInventoryTableTextBlock
Namespace Prefix: | fcx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration