Asset Retirement Obligation (Tables)

12 Months Ended

Dec. 31, 2013

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

	2013			2012
Asset retirement obligation at beginning of period	$	4		$	—
Additions during the period		1			4
Revisions of estimates		(3	)		—
Accretion expense		—			—
Asset retirement obligation at end of period	$	2		$	4