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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details) oz in Millions, lb in Millions, T in Millions | Dec. 31, 2020 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 | 18,052
Copper |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 117,200
Copper | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 113,200
Copper | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 81,800
Gold |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 28.9
Gold | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 28.9
Gold | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 15.5
Molybdenum |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,770
Molybdenum | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,710
Molybdenum | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,390
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 | 4,300
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
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 | 14,300
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 | 200
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 | 2,591
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
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 | 15,200
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 | 0.2
Bagdad [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 920
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 | 777
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
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 | 5,700
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 | 3,240
Average ore grade of copper per metric ton | 0.22%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0
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 | 13,200
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 | 1,280
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 | 33
Average ore grade of copper per metric ton | 0.27%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0
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 | 200
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 | 313
Average ore grade of copper per metric ton | 0.44%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0003
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 | 2,500
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 | 0.2
Chino [Member] | Molybdenum | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 0
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
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 | 60
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
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 | 200
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 | 156
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
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 | 480
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 | 4,077
Average ore grade of copper per metric ton | 0.36%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0
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 | 28,600
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 | 700
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 | 779
Average ore grade of copper per metric ton | 0.41%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0
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 | 4,200
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
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 | 8
Average ore grade of copper per metric ton | 0.55%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0047
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 | 100
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 | 0.1
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 | 53
Average ore grade of copper per metric ton | 2.30%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0098
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 | 2,500
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 | 1.1
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] | 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 | 874
Average ore grade of copper per metric ton | 1.08%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0073
Average ore grade of molybdenum per metric ton | 0.00%
Grasberg block cave [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 17,500
Grasberg block cave [Member] | Gold | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 13.1
Grasberg block cave [Member] | Molybdenum | Productive Land [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 | 351
Average ore grade of copper per metric ton | 0.92%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0090
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 | 6,000
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 | 6.0
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 | 439
Average ore grade of copper per metric ton | 0.89%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0072
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 | 7,400
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 | 8.1
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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