SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Recoverable Reserves) (Details)	Dec. 31, 2013 lb
Copper (pounds) [Member] | North America [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	36,200,000,000	[1]
Copper (pounds) [Member] | South America [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	37,000,000,000	[1]
Copper (pounds) [Member] | Indonesia [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	30,000,000,000	[1]
Copper (pounds) [Member] | Africa [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	8,000,000,000	[1]
Gold (ounces) [Member] | North America [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	400,000
Gold (ounces) [Member] | South America [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	1,100,000
Gold (ounces) [Member] | Indonesia [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	29,800,000
Gold (ounces) [Member] | Africa [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	0
Molybdenum (pounds) [Member] | North America [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	2,550,000,000
Molybdenum (pounds) [Member] | South America [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	710,000,000
Molybdenum (pounds) [Member] | Indonesia [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	0
Molybdenum (pounds) [Member] | Africa [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	0
Consolidated Basis [Member] | Copper (pounds) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	111,200,000,000	[2],[3]
Consolidated Basis [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	31,300,000	[2],[3]
Consolidated Basis [Member] | Molybdenum (pounds) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	3,260,000,000	[2],[3]
Consolidated Basis [Member] | Cobalt (pounds) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	870,000,000
Consolidated Basis [Member] | Silver (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	308,500,000
Net Equity Interest [Member] | Copper (pounds) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	88,600,000,000	[2],[4]
Net Equity Interest [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	28,300,000	[2],[4]
Net Equity Interest [Member] | Molybdenum (pounds) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	2,930,000,000	[2],[4]
Net Equity Interest [Member] | Cobalt (pounds) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	480,000,000
Net Equity Interest [Member] | Silver (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven and Probable Copper Reserves	252,900,000

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

[2] Included estimated recoverable metals contained in stockpiles.

[3] 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.

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