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Discontinued Operations (Summarized Financial Info) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net sales $ 0 $ 1,089 $ 331 $ 2,139
(Loss) income before income taxes (2) 124 2,713 268
(Benefit from) provision for income taxes (6) 48 741 97
Income from discontinued operations after income taxes $ 4 $ 76 $ 1,972 $ 171