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INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES (Components of Inventories) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012
Components of Inventories [Line Items] |  |  |  |  |  |
Raw materials | $ 238 |  | $ 238 |  | $ 237 |
Work-in-process | 199 | [1] | 199 | [1] | 252 | [1]
Finished goods | 1,146 | [2] | 1,146 | [2] | 911 | [2]
Total product inventories | 1,583 |  | 1,583 |  | 1,400 |
Total current mill and leach stockpiles | 1,705 |  | 1,705 |  | 1,672 |
Total material and supplies, net | 1,730 | [3] | 1,730 | [3] | 1,504 | [3]
Long-term mill and leach stockpiles | 2,386 |  | 2,386 |  | 1,955 |
Inventory Write-down | 76 |  | 76 |  |  |
Inventory obsolescence reserves | 24 |  | 24 |  | 27 |
Current [Member] |  |  |  |  |  |
Components of Inventories [Line Items] |  |  |  |  |  |
Mill Stockpiles | 91 |  | 91 |  | 104 |
Leach stockpiles | 1,614 | [4] | 1,614 | [4] | 1,568 |
Total current mill and leach stockpiles | 1,705 |  | 1,705 |  | 1,672 |
Long-Term [Member] |  |  |  |  |  |
Components of Inventories [Line Items] |  |  |  |  |  |
Mill Stockpiles | 698 |  | 698 |  | 615 |
Leach stockpiles | 1,688 |  | 1,688 |  | 1,340 |
Long-term mill and leach stockpiles | $ 2,386 | [5] | $ 2,386 | [5] | $ 1,955 | [5]
[1] | FCX's mining operations also have work-in-process inventories that are included in mill and leach stockpiles.
[2] | Primarily included molybdenum concentrates; copper concentrates, anodes, cathodes and rod; and various cobalt products.
[3] | Materials and supplies inventory was net of obsolescence reserves totaling $24 million at December 31, 2013, and $27 million at December 31, 2012.
[4] | Amount is net of a $76 million charge associated with updated mine plans at Morenci that resulted in a loss in recoverable copper in leach stockpiles.
[5] | Estimated metals in stockpiles not expected to be recovered within the next 12 months.

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