Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	4 Months Ended	12 Months Ended
May 05, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operations data for the discontinued operations
Net revenue	$ 76			$ 294
Operating expenses	86			254
Operating (loss) income before income taxes	(10)			40
Benefit (provision) for income taxes	4			(13)
(Loss) income from discontinued operations, net of tax	(6)		(6)	27
Gain from disposal of discontinued operations, net of tax	312	7	312
Total income from discontinued operations, net of tax	$ 306	$ 7		$ 27

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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- Definition

After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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- Definition

Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

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- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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