Condensed Consolidated Statements Of Operations (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Net loss on disposal of discontinued operations, taxes	$ 0	$ 1	$ 0	$ 2

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

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