SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details)	Dec. 31, 2012 MT g		Dec. 31, 2011 g MT		Dec. 31, 2010 g MT		Dec. 31, 2008 g MT		Dec. 31, 2007 g 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)	17,394,000,000		17,739,000,000		18,516,000,000		13,807,000,000		14,067,000,000
Average ore grade of copper per metric ton	0.43%		0.43%		0.42%		0.49%		0.48%
Average ore grade of gold per metric ton (in grams per metric ton)	0.12		0.12		0.12		0.17		0.17
Average ore grade of molybdenum per metric ton	0.01%		0.01%		0.01%		0.01%		0.01%
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)	198,000,000
Average ore grade of copper per metric ton	0.00%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.16%
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)	4,018,000,000
Average ore grade of copper per metric ton	0.27%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%	[1]
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)	1,731,000,000
Average ore grade of copper per metric ton	0.27%
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%
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)	186,000,000
Average ore grade of copper per metric ton	0.42%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%
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)	2,723,000,000
Average ore grade of copper per metric ton	0.23%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00	[1]
Average ore grade of molybdenum per metric ton	0.03%
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)	138,000,000
Average ore grade of copper per metric ton	0.28%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%
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)	391,000,000
Average ore grade of copper per metric ton	0.42%
Average ore grade of gold per metric ton (in grams per metric ton)	0.02
Average ore grade of molybdenum per metric ton	0.00%	[1]
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)	41,000,000
Average ore grade of copper per metric ton	0.51%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%
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)	113,000,000
Average ore grade of copper per metric ton	0.00%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.17%
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
Average ore grade of copper per metric ton	0.39%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%
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)	4,194,000,000
Average ore grade of copper per metric ton	0.37%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.01%
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)	725,000,000
Average ore grade of copper per metric ton	0.44%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%
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)	315,000,000
Average ore grade of copper per metric ton	0.57%
Average ore grade of gold per metric ton (in grams per metric ton)	0.13
Average ore grade of molybdenum per metric ton	0.00%
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)	5,000,000
Average ore grade of copper per metric ton	0.98%
Average ore grade of gold per metric ton (in grams per metric ton)	0.24
Average ore grade of molybdenum per metric ton	0.00%
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)	258,000,000
Average ore grade of copper per metric ton	0.90%
Average ore grade of gold per metric ton (in grams per metric ton)	0.98
Average ore grade of molybdenum per metric ton	0.00%
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)	176,000,000
Average ore grade of copper per metric ton	0.57%
Average ore grade of gold per metric ton (in grams per metric ton)	0.71
Average ore grade of molybdenum per metric ton	0.00%
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
Average ore grade of copper per metric ton	2.26%
Average ore grade of gold per metric ton (in grams per metric ton)	0.97
Average ore grade of molybdenum per metric ton	0.00%
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)	999,000,000
Average ore grade of copper per metric ton	1.01%
Average ore grade of gold per metric ton (in grams per metric ton)	0.78
Average ore grade of molybdenum per metric ton	0.00%
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
Average ore grade of copper per metric ton	1.25%
Average ore grade of gold per metric ton (in grams per metric ton)	1.07
Average ore grade of molybdenum per metric ton	0.00%
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)	517,000,000
Average ore grade of copper per metric ton	0.84%
Average ore grade of gold per metric ton (in grams per metric ton)	0.70
Average ore grade of molybdenum per metric ton	0.00%
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)	119,000,000
Average ore grade of copper per metric ton	3.26%
Average ore grade of gold per metric ton (in grams per metric ton)	0.00
Average ore grade of molybdenum per metric ton	0.00%
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	133,500,000,000	[2]	136,700,000,000	[2]	137,900,000,000	[2]	120,900,000,000	[2]	118,800,000,000	[2]
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	116,500,000,000	[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	93,200,000,000	[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	38,800,000,000	[3]
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	15,400,000,000	[2]
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	8,300,000,000	[2]
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	1,400,000,000	[2]
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	12,000,000,000	[2]
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	600,000,000	[2]
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	2,700,000,000	[2]
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	400,000,000	[2]
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	[2]
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	[2]
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	[2]
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	38,800,000,000	[3]
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	30,400,000,000	[2]
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	4,100,000,000	[2]
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	4,200,000,000	[2]
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	[2]
Copper (pounds) [Member] | Indonesia [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	31,000,000,000	[3]
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	4,300,000,000	[2]
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	1,900,000,000	[2]
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	[2]
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	18,800,000,000	[2]
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	9,900,000,000	[2]
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	[2]
Copper (pounds) [Member] | Africa [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] | 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	7,900,000,000	[2]
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	44,400,000	[2]	46,100,000	[2]	47,900,000	[2]	49,800,000	[2]	53,400,000	[2]
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	32,500,000	[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	29,400,000	[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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	1,200,000
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	[2]
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	[2]
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	1,200,000	[2]
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	[1],[2]
Gold (ounces) [Member] | Indonesia [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Copper Reserves	30,900,000
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	6,500,000	[2]
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	3,100,000	[2]
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	[2]
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	16,200,000	[2]
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	6,700,000	[2]
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	9,200,000	[2]
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	[2]
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	3,440,000,000	[2]	3,430,000,000	[2]	3,410,000,000	[2]	2,600,000,000	[2]	2,490,000,000	[2]
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	3,420,000,000	[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	3,080,000,000	[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	2,690,000,000
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	[2]
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	400,000,000	[2]
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	[2]
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	1,150,000,000	[2]
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	[2]
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	[2]
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	[2]
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	360,000,000	[2]
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	640,000,000	[2]
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	[2]
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	730,000,000
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	730,000,000	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]
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	[2]

[1] Amounts not shown because of rounding.

[2] Included estimated recoverable metals contained in stockpiles.

[3] Consolidated recoverable copper reserves included 2.9 billion pounds in leach stockpiles and 1.4 billion pounds in mill stockpiles.

[4] Consolidated basis 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. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.84 billion pounds of cobalt at Tenke and 321.4 million ounces of silver in Indonesia, South America and North America, which were determined using long-term average prices of $10 per pound for cobalt and $15 per ounce for silver.

[5] Net equity interest reserves represented estimated consolidated basis metal quantities further reduced for noncontrolling interest ownership. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.47 billion pounds of cobalt at Tenke and 264.2 million ounces of silver in Indonesia, South America and North America.