Segment Reporting, Segment Revenue and Segment Profit (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 primaryreportablesegment	Sep. 30, 2013
Segment Reporting Information [Line Items]
Primary Reportable Segments, Number			2
Segment Revenue	$ 5,120	$ 5,235	$ 15,500	$ 15,793
Segment Profit (Loss)	462	497	1,399	1,371
Services Segment [Member]
Segment Reporting Information [Line Items]
Segment Revenue	2,948	2,932	8,852	8,787
Segment Profit (Loss)	262	292	769	865
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	2,029	2,159	6,199	6,557
Segment Profit (Loss)	285	261	841	692
All Other Segments [Member]
Segment Reporting Information [Line Items]
Segment Revenue	143	144	449	449
Segment Profit (Loss)	$ (85)	$ (56)	$ (211)	$ (186)