INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES (Components of Inventories) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Components of Inventories [Line Items]
Total product inventories	$ 1,226		$ 1,316
Total material and supplies, net	1,354	[1]	1,169	[1]
Total Inventories	2,580		2,485
Inventory obsolescence reserves	26		26
Mining Operations [Member]
Components of Inventories [Line Items]
Raw materials	1		1
Finished goods	769	[2]	704	[2]
Atlantic Copper [Member]
Components of Inventories [Line Items]
Raw materials	260		336
Work-in-process	187		266
Finished goods	$ 9		$ 9

[1] Materials and supplies inventory is net of obsolescence reserves totaling $26 million at December 31, 2011 and 2010.

[2] Primarily includes molybdenum concentrates and copper concentrates, anodes, cathodes and rod.