Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, before tax	$ 12	$ (19)	$ (5)	$ (34)
Income (loss) from discontinued operations, net of tax	13	(12)	4	(18)
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	0	(2)	2	(3)
Income (loss) from discontinued operations, net of tax	0	(1)	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	12	(13)	(7)	(25)
Income (loss) from discontinued operations, net of tax	8	(9)	(4)	(17)
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	0	0
Income (loss) from discontinued operations, net of tax	5	0	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	(2)	0	(4)
Income (loss) from discontinued operations, net of tax	0	(1)	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)	0	(2)
Income (loss) from discontinued operations, net of tax	0	(1)	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	33	0	33	0
Income (loss) from discontinued operations, net of tax	$ 21		$ 21