Business Segment Information (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Processing and services revenue	$ 1,125	$ 1,063	$ 3,301	$ 3,141
Product revenue	188	200	585	609
Total revenue	1,313	1,263	3,886	3,750
Operating income	342	315	982	893
Corporate and Other
Segment Reporting Information [Line Items]
Processing and services revenue	(1)	(1)	(3)	(5)
Product revenue	(12)	(10)	(35)	(31)
Total revenue	(13)	(11)	(38)	(36)
Operating income	(93)	(79)	(265)	(254)
Payments | Operating segments
Segment Reporting Information [Line Items]
Processing and services revenue	554	520	1,610	1,512
Product revenue	160	166	501	516
Total revenue	714	686	2,111	2,028
Operating income	217	201	616	566
Financial | Operating segments
Segment Reporting Information [Line Items]
Processing and services revenue	572	544	1,694	1,634
Product revenue	40	44	119	124
Total revenue	612	588	1,813	1,758
Operating income	$ 218	$ 193	$ 631	$ 581