Asset Impairments (Notes)

6 Months Ended

Jun. 30, 2015

Asset Impairments [Abstract]

Asset Impairments

Asset Impairments

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

	Three Months Ended June 30,				Six Months Ended June 30,
(millions)	2015		2014		2015		2014
Deepwater Gulf of Mexico	$	8	$	18	$	11	$	23
Eastern Mediterranean	7		14		32		14
North Sea	—		2		—		94
Total	$	15	$	34	$	43	$	131

Impairments for 2015 were primarily related to revisions in expected field abandonment or other costs at South Raton (Deepwater Gulf of Mexico) and the Noa and Pinnacles fields (Eastern Mediterranean).

Impairments for 2014 were primarily related to an increase in expected field abandonment costs and a change in the timing of abandonment activities at the North Sea MacCulloch field.

See Note 2. Basis of Presentation, Note 8. Fair Value Measurements and Disclosures and Note10. Asset Retirement Obligations.