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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details) oz in Millions, lb in Millions, T in Millions | Dec. 31, 2017 lb oz T g
--- | ---
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 13,867
Copper |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 103,700
Copper | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 86,700
Copper | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 71,300
Gold |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 34.2
Gold | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 23.5
Gold | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 21.3
Molybdenum |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 2,880
Molybdenum | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 2,840
Molybdenum | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 2,560
Morenci | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 3,134
Average ore grade of copper per metric ton | 0.26%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.00%
Morenci | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 11,800
Morenci | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Morenci | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 140
Bagdad [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 1,405
Average ore grade of copper per metric ton | 0.31%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.02%
Bagdad [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 7,500
Bagdad [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.1
Bagdad [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 360
Safford [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 662
Average ore grade of copper per metric ton | 0.45%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.00%
Safford [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 5,000
Safford [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Safford [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Sierrita [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 2,245
Average ore grade of copper per metric ton | 0.23%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.03%
Sierrita [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 9,900
Sierrita [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.1
Sierrita [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 1,010
Tyrone [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 9
Average ore grade of copper per metric ton | 0.42%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.00%
Tyrone [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 100
Tyrone [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Tyrone [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Chino [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 276
Average ore grade of copper per metric ton | 0.46%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.02
Average ore grade of molybdenum per metric ton | 0.00%
Chino [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 2,400
Chino [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.1
Chino [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 10
Miami [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 0
Average ore grade of copper per metric ton | 0.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.00%
Miami [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 100
Miami [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Miami [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Henderson [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 74
Average ore grade of copper per metric ton | 0.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.17%
Henderson [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Henderson [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Henderson [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 240
Climax [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 160
Average ore grade of copper per metric ton | 0.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.15%
Climax [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Climax [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Climax [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 500
Cerro Verde | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 3,577
Average ore grade of copper per metric ton | 0.37%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.01%
Cerro Verde | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 25,600
Cerro Verde | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
Cerro Verde | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 620
El Abra | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 394
Average ore grade of copper per metric ton | 0.44%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.00
Average ore grade of molybdenum per metric ton | 0.00%
El Abra | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 2,500
El Abra | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 0.0
El Abra | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Grasberg open pit [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 34
Average ore grade of copper per metric ton | 1.29%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 2.64
Average ore grade of molybdenum per metric ton | 0.00%
Grasberg open pit [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 1,100
Grasberg open pit [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 2.7
Grasberg open pit [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Deep Ore Zone [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 79
Average ore grade of copper per metric ton | 0.54%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.76
Average ore grade of molybdenum per metric ton | 0.00%
Deep Ore Zone [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 900
Deep Ore Zone [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 1.6
Deep Ore Zone [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Big Gossan [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 58
Average ore grade of copper per metric ton | 2.22%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.93
Average ore grade of molybdenum per metric ton | 0.00%
Big Gossan [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 2,600
Big Gossan [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 1.2
Big Gossan [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Grasberg block cave [Member] | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 963
Average ore grade of copper per metric ton | 1.01%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.72
Average ore grade of molybdenum per metric ton | 0.00%
Grasberg block cave [Member] | Copper | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 18,100
Grasberg block cave [Member] | Gold | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 14.5
Grasberg block cave [Member] | Molybdenum | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Kucing Liar [Member] | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 360
Average ore grade of copper per metric ton | 1.25%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 1.07
Average ore grade of molybdenum per metric ton | 0.00%
Kucing Liar [Member] | Copper | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 8,400
Kucing Liar [Member] | Gold | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 5.4
Kucing Liar [Member] | Molybdenum | Undeveloped [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
Deep Mill Level Zone [Member] | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 437
Average ore grade of copper per metric ton | 0.91%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.76
Average ore grade of molybdenum per metric ton | 0.00%
Deep Mill Level Zone [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 7,700
Deep Mill Level Zone [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 8.5
Deep Mill Level Zone [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0

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