PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET (Schedule of PPE) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	$ 37,484	$ 34,249
Accumulated depreciation, depletion and amortization	(11,264)	(10,207)
Property, plant, equipment and mining development costs, net	26,220	24,042
Proven and probable reserves [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	4,651	4,651
Value beyond proven and probable reserves (VBPP) [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	1,042	1,044
Mining development and other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	4,712	4,335
Buildings and infrastructure [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	5,100	4,334
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	11,251	10,379
Mobile equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	3,926	3,903
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, equipment and mining development costs	$ 6,802	$ 5,603