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Consolidated Statements of Operations Parenthetical (Parentheticals) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Statement [Abstract]    
Income tax benefit (expense) on discontinued operations $ 0us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation $ 38us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation