Asset Impairments (Tables)

12 Months Ended

Dec. 31, 2011

Asset Impairments [Abstract]

Asset Impairment Charges, Pre-tax (non-cash)

Pre-tax (non-cash) asset impairment charges were as follows:

	Year Ended December 31,
	2011		2010		2009
(millions)
Piceance (Onshore US)	$	487	$	-	$	-
Tri-State (Onshore US)		121		-		-
Iron Horse (Onshore US)		15		89		-
East Texas (Onshore US)		128		-		-
New Albany Shale (Onshore US)		-		19		44
Granite Wash (Onshore US)		-		-		389
Main Pass (Gulf of Mexico Shelf)		-		5		48
Raton (Deepwater Gulf of Mexico)		-		6		23
Noa/Noa South (Offshore Israel)		-		25		-
Ecuador		-		-		100
Other Onshore US Proved Properties		6		-		-
Other Offshore International Proved Properties		2		-		-
Total	$	759	$	144	$	604