Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2014

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation Summary

	Asset Retirement
Asset Category	Obligation			Estimated Life
Oil and gas producing properties	$	2	(1)	27.5 years

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(1) This is a recurring Level 3 fair value measurement.

Change in Asset Retirement Obligation

	2014		2013
Asset retirement obligation at beginning of period	$	2	$	4
Additions during the period		—		1
Revisions of estimates		—		(3	)
Accretion expense		—		—
Asset retirement obligation at end of period	$	2	$	2