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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax $ (2) $ (10) $ (7) $ (44)
Income (loss) from discontinued operations, net of tax (1) (7) 3 (25)
Environmental Matters [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax     2 (3)
Income (loss) from discontinued operations, net of tax     1 (2)
Divestiture of the Entertainment Business [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax (2) (10) (9) (35)
Income (loss) from discontinued operations, net of tax (1) (7) (5) (24)
Spin Off of Teradata [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax     0 0
Income (loss) from discontinued operations, net of tax     7 4
Divestiture of the Healthcare Business [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax     0 (4)
Income (loss) from discontinued operations, net of tax     0 (2)
Closure of the EFT Canadian Business [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax     0 (2)
Income (loss) from discontinued operations, net of tax     0 (1)
Entertainment Business [Member]
       
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income (loss) from discontinued operations, before tax 0 0 33 0
Income (loss) from discontinued operations, net of tax $ 21   $ 21