BUSINESS SEGMENTS (Long Lived Assets by Geographic Area) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	$ 49,412	[1]	$ 51,204	[1]	$ 24,589	[1]
United States [Member]
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	29,468	[1]	32,969	[1],[2]	8,689	[1]
Indonesia [Member]
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	6,961	[1]	5,799	[1]	5,127	[1]
Democratic Republic of Congo [Member]
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	4,071	[1]	3,994	[1]	3,926	[1]
Peru [Member]
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	6,848	[1]	5,181	[1]	3,933	[1]
Chile [Member]
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	1,542	[1],[3]	2,699	[1]	2,587	[1]
Other [Member]
Long Lived assets by geographic area of customer [Line Items]
Long-Lived Assets	$ 522	[1]	$ 562	[1]	$ 327	[1]

[1] Long-lived assets exclude deferred tax assets, intangible assets and goodwill.

[2] Increased from 2012 primarily because of the PXP and MMR acquisitions.

[3] Decreased from 2013 primarily because of the sale of Candelaria/Ojos.