Asset Impairments

6 Months Ended

Jun. 30, 2011

Impairment of Long-Lived Assets Held and Used [Abstract]

Note 3. Asset Impairments

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
(millions)
East Texas (Onshore US)	$	116	$	-	$	116	$	-
Other (Primarily Onshore US)		15		-		23		-
Total	$	131	$	-	$	139	$	-

Due to field performance combined with a low natural gas price environment, we determined that the carrying amounts of certain of our onshore US developments, primarily in East Texas, were not recoverable from future cash flows and, therefore, were impaired. The assets were written down to their estimated fair values, which were determined using discounted cash flow models. See Note 6. Fair Value Measurements and Disclosures.