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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Recoverable Reserves) (Details) | Dec. 31, 2013 lb
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Copper (pounds) [Member] | North America [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 36,200,000,000 | [1]
Copper (pounds) [Member] | South America [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 37,000,000,000 | [1]
Copper (pounds) [Member] | Indonesia [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 30,000,000,000 | [1]
Copper (pounds) [Member] | Africa [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 8,000,000,000 | [1]
Gold (ounces) [Member] | North America [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 400,000 |
Gold (ounces) [Member] | South America [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 1,100,000 |
Gold (ounces) [Member] | Indonesia [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 29,800,000 |
Gold (ounces) [Member] | Africa [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 0 |
Molybdenum (pounds) [Member] | North America [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 2,550,000,000 |
Molybdenum (pounds) [Member] | South America [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 710,000,000 |
Molybdenum (pounds) [Member] | Indonesia [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 0 |
Molybdenum (pounds) [Member] | Africa [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 0 |
Consolidated Basis [Member] | Copper (pounds) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 111,200,000,000 | [2],[3]
Consolidated Basis [Member] | Gold (ounces) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 31,300,000 | [2],[3]
Consolidated Basis [Member] | Molybdenum (pounds) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 3,260,000,000 | [2],[3]
Consolidated Basis [Member] | Cobalt (pounds) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 870,000,000 |
Consolidated Basis [Member] | Silver (ounces) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 308,500,000 |
Net Equity Interest [Member] | Copper (pounds) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 88,600,000,000 | [2],[4]
Net Equity Interest [Member] | Gold (ounces) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 28,300,000 | [2],[4]
Net Equity Interest [Member] | Molybdenum (pounds) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 2,930,000,000 | [2],[4]
Net Equity Interest [Member] | Cobalt (pounds) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 480,000,000 |
Net Equity Interest [Member] | Silver (ounces) [Member] |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |
Estimated Recoverable Proven and Probable Copper Reserves | 252,900,000 |
[1] | Consolidated recoverable copper reserves included 3.3 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.
[2] | Included estimated recoverable metals contained in stockpiles.
[3] | Consolidated reserves represented estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia.
[4] | Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership.

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