Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Processing and services revenue	$ 1,223	$ 1,199	$ 3,668	$ 3,563
Product revenue	189	201	604	617
Total revenue	1,412	1,400	4,272	4,180
Operating income	356	370	1,322	1,107
Corporate and Other
Segment Reporting Information [Line Items]
Processing and services revenue	14	2	30	7
Product revenue	(20)	(17)	(61)	(58)
Total revenue	(6)	(15)	(31)	(51)
Operating income	(98)	(87)	(75)	(257)
Payments | Operating segments
Segment Reporting Information [Line Items]
Processing and services revenue	674	621	1,992	1,818
Product revenue	170	175	531	551
Total revenue	844	796	2,523	2,369
Operating income	267	253	807	750
Financial | Operating segments
Segment Reporting Information [Line Items]
Processing and services revenue	535	576	1,646	1,738
Product revenue	39	43	134	124
Total revenue	574	619	1,780	1,862
Operating income	$ 187	$ 204	$ 590	$ 614