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Inventories, Including Long-Term Mill and Leach Stockpiles (Unaudited) (Tables) | 6 Months Ended
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Jun. 30, 2013
Inventories, Including Long Term Mill and Leach Stockpiles [Abstract] |
Components of inventories | The components of inventories follow (in millions):
| June 30, 2013 |  | December 31, 2012
Raw materials (primarily concentrates) | $ | 210 |  |  | $ | 237 |
Work-in-process a | 244 |  |  | 252 |
Finished goods b | 1,054 |  |  | 911 |
Total product inventories | $ | 1,508 |  |  | $ | 1,400 |
Total materials and supplies, net c | $ | 1,725 |  |  | $ | 1,504 |
a. | FCX's mining operations also have work-in-process inventories that are included in mill and leach stockpiles.
b. | Primarily included molybdenum concentrates and copper concentrates, anodes, cathodes and rod.
c. | Materials and supplies inventory was net of obsolescence reserves totaling $30 million at June 30, 2013, and $27 million at December 31, 2012.
Summary of mill and leach stockpiles | A summary of mill and leach stockpiles follows (in millions):
| June 30, 2013 |  | December 31, 2012
Current: |  |  |
Mill stockpiles | $ | 94 |  |  | $ | 104 |
Leach stockpiles | 1,619 |  |  | 1,568 |
Total current mill and leach stockpiles | $ | 1,713 |  |  | $ | 1,672 |
Long-term:a |  |  |
Mill stockpiles | $ | 649 |  |  | $ | 615 |
Leach stockpiles | 1,543 |  |  | 1,340 |
Total long-term mill and leach stockpiles | $ | 2,192 |  |  | $ | 1,955 |
a. | Metals in stockpiles not expected to be recovered within the next 12 months.

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