Segment Reporting, Segment Revenue and Segment Profit (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Primary Reportable Segments, Number			2
Segment Revenue	$ 5,292	$ 5,391	$ 10,402	$ 10,583
Segment Profit (Loss)	487	484	936	873
Services Segment [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,992	2,946	5,904	5,855
Segment Profit (Loss)	257	301	507	573
Services Segment [Member] | Outsourcing Offerings [Member]
Segment Reporting Information [Line Items]
Outsourcing Service Offerings, Number			3
Document Technology Segment [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,125	2,263	4,170	4,398
Segment Profit (Loss)	306	244	556	431
All Other Segments [Member]
Segment Reporting Information [Line Items]
Segment Revenue	175	182	328	330
Segment Profit (Loss)	$ (76)	$ (61)	$ (127)	$ (131)