Asset Impairments (Notes)

9 Months Ended

Sep. 30, 2015

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



	Three Months Ended September 30,				Nine Months Ended September 30,
(millions)	2015		2014		2015		2014
US Properties, Primarily Shelf and Deepwater Gulf of Mexico	$	—	$	2	$	11	$	56
Eastern Mediterranean	—		31		32		14
North Sea	—		—		—		94
Total	$	—	$	33	$	43	$	164

Impairments for 2015 are primarily related to revisions in expected field abandonment or other costs at South Raton and Lorien (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 Note 10. Asset Retirement Obligations.