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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2014
Supplementary Mineral Reserve Information [Abstract] |
Estimated Recoverable Proven and Probable Reserves by Location |
| Recoverable Proven and Probable Mineral Reserves
| Estimated at December 31, 2014
| Copper a (billion pounds) |  | Gold (million ounces) |  | Molybdenum (billion pounds)
North America | 35.6 |  |  | 0.3 |  |  | 2.42 |
South America | 31.8 |  |  | — |  |  | 0.69 |
Indonesia | 29.0 |  |  | 28.2 |  |  | — |
Africa | 7.1 |  |  | — |  |  | — |
Consolidated b | 103.5 |  |  | 28.5 |  |  | 3.11 |
Net equity interest c | 82.8 |  |  | 25.9 |  |  | 2.79 |
a. | Consolidated recoverable copper reserves included 3.6 billion pounds in leach stockpiles and 0.9 billion pounds in mill stockpiles.
b. | Consolidated reserves represent estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.85 billion pounds of cobalt at Tenke and 282.9 million ounces of silver in Indonesia, South America and North America, which were determined using long-term average prices of $10 per pound for cobalt and $15 per ounce for silver.
c. | Net equity interest reserves represent estimated consolidated metal quantities further reduced for noncontrolling interest ownership. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.47 billion pounds of cobalt at Tenke and 232.4 million ounces of silver in Indonesia, South America and North America.
Supplementary Reserve Information at 100% Basis by Location |
|  | Recoverable Proven and Probable Mineral Reserves
|  | Estimated at December 31, 2014
|  |  |  | Average Ore Grade Per Metric Ton a |  | Recoverable Proven and Probable Reserves b
|  | Ore a (million metric tons) |  | Copper (%) |  | Gold (grams) |  | Molybdenum (%) |  | Copper (billion pounds) |  | Gold (million ounces) |  | Molybdenum (billion pounds)
North America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed and producing: |  |  |  |  |  |  |  |  |  |  |  |
Morenci |  | 3,923 |  |  | 0.27 |  | — |  |  | — | c | 15.1 |  |  | — |  |  | 0.17 |
Bagdad |  | 1,334 |  |  | 0.32 |  | — |  | c | 0.02 |  | 7.8 |  |  | 0.1 |  |  | 0.38 |
Safford |  | 122 |  |  | 0.47 |  | — |  |  | — |  | 1.1 |  |  | — |  |  | — |
Sierrita |  | 2,464 |  |  | 0.23 |  | — |  | c | 0.02 |  | 10.8 |  |  | 0.1 |  |  | 1.01 |
Miami |  | 3 |  |  | 0.58 |  | — |  |  | — |  | 0.1 |  |  | — |  |  | — |
Chino |  | 301 |  |  | 0.39 |  | 0.02 |  |  | — | c | 2.2 |  |  | 0.1 |  |  | 0.01 |
Tyrone |  | 59 |  |  | 0.32 |  | — |  |  | — |  | 0.4 |  |  | — |  |  | — |
Henderson |  | 90 |  |  | — |  | — |  |  | 0.17 |  | — |  |  | — |  |  | 0.28 |
Climax |  | 185 |  |  | — |  | — |  |  | 0.16 |  | — |  |  | — |  |  | 0.59 |
Undeveloped: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cobre |  | 71 |  |  | 0.37 |  | — |  |  | — |  | 0.3 |  |  | — |  |  | — |
South America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed and producing: |  |  |  |  |  |  |  |  |  |  |  |
Cerro Verde |  | 3,953 |  |  | 0.37 |  | — |  |  | 0.01 |  | 28.9 |  |  | — |  |  | 0.69 |
El Abra |  | 444 |  |  | 0.46 |  | — |  |  | — |  | 2.9 |  |  | — |  |  | — |
Indonesia |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed and producing: |  |  |  |  |  |  |  |  |  |  |  |
Grasberg open pit |  | 179 |  |  | 0.96 |  | 1.06 |  |  | — |  | 3.2 |  |  | 4.9 |  |  | — |
Deep Ore Zone |  | 146 |  |  | 0.54 |  | 0.69 |  |  | — |  | 1.5 |  |  | 2.5 |  |  | — |
Big Gossan |  | 54 |  |  | 2.26 |  | 0.99 |  |  | — |  | 2.4 |  |  | 1.1 |  |  | — |
Undeveloped: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grasberg Block Cave |  | 1,012 |  |  | 1.00 |  | 0.77 |  |  | — |  | 18.9 |  |  | 16.3 |  |  | — |
Kucing Liar |  | 406 |  |  | 1.25 |  | 1.07 |  |  | — |  | 9.5 |  |  | 6.3 |  |  | — |
Deep Mill Level Zone |  | 472 |  |  | 0.87 |  | 0.71 |  |  | — |  | 7.9 |  |  | 8.6 |  |  | — |
Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed and producing: |  |  |  |  |  |  |  |  |  |  |  |
Tenke Fungurume |  | 98 |  |  | 3.27 |  | — |  |  | — |  | 7.1 |  |  | — |  |  | — |
Total 100% basis |  | 15,316 |  |  |  |  |  |  |  |  | 120.1 |  |  | 40.0 |  |  | 3.13 |
Consolidated d |  |  |  |  |  |  |  |  |  | 103.5 |  |  | 28.5 |  |  | 3.11 |
FCX’s equity share e |  |  |  |  |  |  |  |  |  | 82.8 |  |  | 25.9 |  |  | 2.79 |
a. | Excludes material contained in stockpiles.
b. | Includes estimated recoverable metals contained in stockpiles.
c. | Amounts not shown because of rounding.
d. | Consolidated reserves represent estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia.
e. | Net equity interest reserves represent estimated consolidated metal quantities further reduced for noncontrolling interest ownership.

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- Definition Supplemental schedule of the entity's recoverable proven and probable reserves by mine site or ore body, including related information such as amount of ore and average ore grades, at 100 percent basis, by mine site or ore body. + References No definition available. + Details
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