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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details) oz in Millions, lb in Millions, T in Millions | Dec. 31, 2019 lb T oz g
--- | ---
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Amount of ore reserves (in metric tons of ore) | T | 18,137
Copper |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 120,000
Copper | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 116,000
Copper | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 83,400
Gold |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 29.6
Gold | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 29.6
Gold | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | oz | 16.1
Molybdenum |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,640
Molybdenum | Consolidated Basis [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,580
Molybdenum | Net Equity Interest [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 3,250
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 | 4,435
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 | 14,500
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 | 190
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 | 2,535
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
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 | 15,300
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 | 790
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 | 812
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 | 5,900
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 | 2,960
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 | 0.02%
Sierrita [Member] | Copper | Productive Land [Member] |
Ore, average ore grades and recoverable proven and probable reserves [Line Items] |
Estimated Recoverable Proven And Probable Reserves | 12,500
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 | 1,230
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 | 49
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
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 | 324
Average ore grade of copper per metric ton | 0.45%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0003
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 | 2,700
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
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 | 67
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 | 220
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
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 | 490
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 | 4,265
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
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 | 29,300
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 | 710
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 | 717
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 | 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
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 | 29
Average ore grade of copper per metric ton | 0.50%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0048
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 | 300
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 | 0.4
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 | 55
Average ore grade of copper per metric ton | 2.33%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0097
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] | 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 | 959
Average ore grade of copper per metric ton | 0.97%
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 | 17,200
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 | 14.2
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 | 340
Average ore grade of copper per metric ton | 1.25%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0104
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 | 8,000
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 | 5.1
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 | 429
Average ore grade of copper per metric ton | 0.92%
Average ore grade of gold per metric ton (in grams per metric ton) | g | 0.0075
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 | 8.2
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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