SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details)	Dec. 31, 2013 MT
Total 100% basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	16,121,000,000	[1]
Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Average ore grade of copper per metric ton	0.00%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.16%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	3,779,000,000	[1]
Average ore grade of copper per metric ton	0.27%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1],[2]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	1,449,000,000	[1]
Average ore grade of copper per metric ton	0.31%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1],[2]
Average ore grade of molybdenum per metric ton	0.02%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	149,000,000	[1]
Average ore grade of copper per metric ton	0.45%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	2,534,000,000	[1]
Average ore grade of copper per metric ton	0.23%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1],[2]
Average ore grade of molybdenum per metric ton	0.03%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	69,000,000	[1]
Average ore grade of copper per metric ton	0.34%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	376,000,000	[1]
Average ore grade of copper per metric ton	0.42%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.02	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1],[2]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	15,000,000	[1]
Average ore grade of copper per metric ton	0.43%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	105,000,000	[1]
Average ore grade of copper per metric ton	0.00%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.17%	[1]
North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	189,000,000	[1]
North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	73,000,000	[1]
Average ore grade of copper per metric ton	0.39%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	4,047,000,000	[1]
Average ore grade of copper per metric ton	0.37%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.01%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	576,000,000	[1]
Average ore grade of copper per metric ton	0.45%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	281,000,000	[1]
Average ore grade of copper per metric ton	0.58%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.14	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	8,000,000	[1]
Average ore grade of copper per metric ton	1.00%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.23	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	206,000,000	[1]
Average ore grade of copper per metric ton	0.95%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	1.08	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	152,000,000	[1]
Average ore grade of copper per metric ton	0.56%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.73	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	54,000,000	[1]
Average ore grade of copper per metric ton	2.22%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.97	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	1,000,000,000	[1]
Average ore grade of copper per metric ton	1.02%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.78	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	420,000,000	[1]
Average ore grade of copper per metric ton	1.24%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	1.07	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	526,000,000	[1]
Average ore grade of copper per metric ton	0.83%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.70	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	113,000,000	[1]
Average ore grade of copper per metric ton	3.34%	[1]
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.00%	[1]
Copper (pounds) [Member] | Total 100% basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	128,000,000,000	[3]
Copper (pounds) [Member] | Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	111,200,000,000	[3],[4]
Copper (pounds) [Member] | Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	88,600,000,000	[3],[5]
Copper (pounds) [Member] | North America [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	36,200,000,000	[6]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	14,600,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	7,900,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	1,200,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	11,000,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	500,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	2,600,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	200,000,000	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Copper (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	300,000,000	[3]
Copper (pounds) [Member] | South America [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	37,000,000,000	[6]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	29,400,000,000	[3]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	3,600,000,000	[3]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	3,900,000,000	[3]
Copper (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	100,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	30,000,000,000	[6]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	3,600,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	1,600,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	2,500,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	18,900,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	9,800,000,000	[3]
Copper (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	8,300,000,000	[3]
Copper (pounds) [Member] | Africa [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	8,000,000,000	[6]
Copper (pounds) [Member] | Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	8,000,000,000	[3]
Gold (ounces) [Member] | Total 100% basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	43,100,000	[3]
Gold (ounces) [Member] | Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	31,300,000	[3],[4]
Gold (ounces) [Member] | Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	28,300,000	[3],[5]
Gold (ounces) [Member] | North America [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	400,000
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	100,000	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	100,000	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	200,000	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | South America [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	1,100,000
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	1,100,000	[3]
Gold (ounces) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[2],[3]
Gold (ounces) [Member] | Indonesia [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	29,800,000
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	5,800,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	2,800,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	1,100,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	16,100,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	6,500,000	[3]
Gold (ounces) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	9,300,000	[3]
Gold (ounces) [Member] | Africa [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0
Gold (ounces) [Member] | Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Total 100% basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	3,280,000,000	[3]
Molybdenum (pounds) [Member] | Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	3,260,000,000	[3],[4]
Molybdenum (pounds) [Member] | Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	2,930,000,000	[3],[5]
Molybdenum (pounds) [Member] | North America [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	2,550,000,000
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Morenci [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	150,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	390,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	1,080,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	10,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	330,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	610,000,000	[3]
Molybdenum (pounds) [Member] | North America [Member] | Total 100% basis [Member] | Undeveloped [Member] | Cobre [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | South America [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	710,000,000
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Cerro Verde [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	710,000,000	[3]
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | El Abra [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Candelaria [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | South America [Member] | Total 100% basis [Member] | Developed and producing [Member] | Ojos del Salado [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Grasberg open pit [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Deep Ore Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Developed and producing [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Indonesia [Member] | Total 100% basis [Member] | Undeveloped [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]
Molybdenum (pounds) [Member] | Africa [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0
Molybdenum (pounds) [Member] | Africa [Member] | Total 100% basis [Member] | Developed and producing [Member] | Tenke Fungurume [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	0	[3]

[1] Excludes material contained in stockpiles.

[2] Amounts not shown because of rounding.

[3] Included estimated recoverable metals contained in stockpiles.

[4] 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.

[5] Net equity interest reserves represented estimated consolidated metal quantities further reduced for noncontrolling interest ownership.

[6] Consolidated recoverable copper reserves included 3.3 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.