Consolidated Statements Of Operations (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net loss on disposal of discontinued operations, taxes	$ 0	$ 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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