Segment Reporting, Segment Revenue and Segment Profit (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 businesses offerings primaryreportablesegment	Sep. 30, 2010
Segment Reporting Information [Line Items]
Primary Reportable Segments, Number			2
Outsourcing Service Offerings			3
Segment Revenue	$ 5,583	$ 5,428	$ 16,662	$ 15,657
Segment Profit (Loss)	495	454	1,510	1,285
Technology [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,500	2,466	7,547	7,504
Segment Profit (Loss)	258	247	824	753
Services [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,717	2,554	7,973	6,926
Segment Profit (Loss)	323	286	911	808
Other [Member]
Segment Reporting Information [Line Items]
Segment Revenue	366	408	1,142	1,227
Segment Profit (Loss)	$ (86)	$ (79)	$ (225)	$ (276)