Business Segment Information (Schedule Of Key Financial Information By Reportable Segments) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Processing and services revenue	$ 882	$ 858	$ 2,628	$ 2,545
Product revenue	181	167	548	510
Total revenue	1,063	1,025	3,176	3,055
Operating income	243	251	715	740
Payments [Member]
Segment Reporting Information [Line Items]
Processing and services revenue	439	413	1,287	1,216
Product revenue	148	135	459	411
Total revenue	587	548	1,746	1,627
Operating income	162	159	482	458
Financial [Member]
Segment Reporting Information [Line Items]
Processing and services revenue	446	445	1,348	1,327
Product revenue	41	41	116	118
Total revenue	487	486	1,464	1,445
Operating income	143	143	435	430
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Processing and services revenue	(3)		(7)	2
Product revenue	(8)	(9)	(27)	(19)
Total revenue	(11)	(9)	(34)	(17)
Operating income	$ (62)	$ (51)	$ (202)	$ (148)