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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details) oz in Millions, lb in Millions, T in Millions | Dec. 31, 2018 lb oz g T
--- | ---
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 18,828
Copper |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 124,000
Copper | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 119,600
Copper | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 86,800
Gold |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 30.8
Gold | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 30.8
Gold | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 17.0
Molybdenum |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,830
Molybdenum | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,780
Molybdenum | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,440
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 | 4,619
Average ore grade of copper per metric ton | 0.24%
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 | 15,600
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 | 180
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 | 2,426
Average ore grade of copper per metric ton | 0.32%
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 | 14,700
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 | 740
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 | 839
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%
Safford [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 6,200
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 | 3,369
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 | 0.02%
Sierrita [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 14,000
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 | 0.2
Sierrita [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 1,420
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 | 55
Average ore grade of copper per metric ton | 0.25%
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 | 300
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 | 395
Average ore grade of copper per metric ton | 0.46%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.03
Average ore grade of molybdenum per metric ton | 0.01%
Chino [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,400
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 | 0.3
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 | 71
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 | 168
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 | 520
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 | 4,324
Average ore grade of copper per metric ton | 0.35%
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 | 29,600
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 | 720
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 | 705
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%
El Abra | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,900
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 | 5
Average ore grade of copper per metric ton | 1.26%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 1.98
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 | 200
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 | 0.4
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 | 51
Average ore grade of copper per metric ton | 0.50%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.57
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 | 500
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 | 0.8
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 | 57
Average ore grade of copper per metric ton | 2.30%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 1.02
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 | 1.3
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 | 0.96%
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 | 17,200
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 | 14.1
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 | 349
Average ore grade of copper per metric ton | 1.24%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 1.03
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 | 8,100
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 | 5.2
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 | 432
Average ore grade of copper per metric ton | 0.92%
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 | 7,600
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 | 8.4
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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