Business Segment Information (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Processing and services revenue	$ 1,159	$ 1,109	$ 2,281	$ 2,176
Product revenue	204	189	413	397
Total revenue	1,363	1,298	2,694	2,573
Operating income	362	326	701	640
Corporate and Other
Segment Reporting Information [Line Items]
Processing and services revenue	2	(1)	3	(2)
Product revenue	(14)	(10)	(32)	(23)
Total revenue	(12)	(11)	(29)	(25)
Operating income	(77)	(91)	(158)	(172)
Payments | Operating segments
Segment Reporting Information [Line Items]
Processing and services revenue	587	540	1,147	1,056
Product revenue	176	161	365	341
Total revenue	763	701	1,512	1,397
Operating income	237	208	462	399
Financial | Operating segments
Segment Reporting Information [Line Items]
Processing and services revenue	570	570	1,131	1,122
Product revenue	42	38	80	79
Total revenue	612	608	1,211	1,201
Operating income	$ 202	$ 209	$ 397	$ 413