Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2011

Discontinued Operations

Summarized results of discontinued operations

	Years ended December 31,
	2011			2010			2009
Operating revenues	$	62		$	110		$	115
Costs and expenses	(55		)	(99		)	(110		)
Loss on impairment (a)	(10		)	(2		)	—
Gain on disposal of discontinued operations, net	181			—			—
Income from discontinued operations before income tax expense	178			9			5
Income tax benefit (expense)	19			25			(31		)
Income (loss) from discontinued operations, net of tax	$	197		$	34		$	(26	)

Assets and liabilities of discontinued operations

	December 31,
	2011		2010
Assets
Oil and gas properties, net	$	24	$	—
Other related assets	2		—
Assets held for sale	$	26	$	—
Accounts receivable	$	6	$	22
Other assets	25		17
Other current assets	$	31	$	39
Rig and related equipment, net	$	—	$	86
Oil and gas properties, net	—		53
Other assets	$	—	$	139
Liabilities
Accounts payable	$	3	$	15
Other liabilities	14		13
Other current liabilities	$	17	$	28
Asset retirement obligation	$	—	$	9
Deferred taxes	—		19
Other long-term liabilities	$	—	$	28