Business Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Business Segment Information [Line Items]
Processing and services revenue									$ 3,543	$ 3,415	$ 3,329
Product revenue									794	718	748
Total revenue	1,161	1,063	1,065	1,048	1,078	1,025	1,022	1,008	4,337	4,133	4,077
Operating income	281	243	251	221	267	251	251	238	996	1,007	946
Total assets	8,548				8,281				8,548	8,281	8,378
Capital expenditures									192	175	198
Depreciation and amortization expense									349	339	333
Payments [Member]
Business Segment Information [Line Items]
Processing and services revenue									1,736	1,637	1,579
Product revenue									645	571	581
Total revenue									2,381	2,208	2,160
Operating income									656	625	617
Total assets	6,092				5,707				6,092	5,707	5,762
Capital expenditures									98	91	103
Depreciation and amortization expense									95	90	87
Financial [Member]
Business Segment Information [Line Items]
Processing and services revenue									1,820	1,778	1,747
Product revenue									184	173	195
Total revenue									2,004	1,951	1,942
Operating income									613	591	569
Total assets	2,131				1,973				2,131	1,973	2,145
Capital expenditures									80	78	89
Depreciation and amortization expense									81	82	86
Corporate And Other [Member]
Business Segment Information [Line Items]
Processing and services revenue									(13)		3
Product revenue									(35)	(26)	(28)
Total revenue									(48)	(26)	(25)
Operating income									(273)	(209)	(240)
Total assets	325				601				325	601	471
Capital expenditures									14	6	6
Depreciation and amortization expense									$ 173	$ 167	$ 160