Segment Reporting, Segment Revenue and Segment Profit (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 offerings primaryreportablesegment	Mar. 31, 2011
Segment Reporting Information [Line Items]
Primary Reportable Segments, Number	2
Outsourcing Service Offerings	3
Segment Revenue	$ 5,503	$ 5,465
Segment Profit (Loss)	456	466
Services Segment [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,821	2,584
Segment Profit (Loss)	263	266
Technology Segment [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,338	2,495
Segment Profit (Loss)	245	266
Other [Member]
Segment Reporting Information [Line Items]
Segment Revenue	344	386
Segment Profit (Loss)	$ (52)	$ (66)