Business Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Processing and services revenue	$ 909	$ 862
Product revenue	199	186
Total revenue	1,108	1,048
Operating income	241	221
Payments [Member]
Segment Reporting Information [Line Items]
Processing and services revenue	446	419
Product revenue	173	161
Total revenue	619	580
Operating income	161	156
Financial [Member]
Segment Reporting Information [Line Items]
Processing and services revenue	465	444
Product revenue	36	36
Total revenue	501	480
Operating income	151	139
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Processing and services revenue	(2)	(1)
Product revenue	(10)	(11)
Total revenue	(12)	(12)
Operating income	$ (71)	$ (74)