Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Processing and services revenue									$ 4,833	$ 4,625	$ 4,411
Product revenue									863	880	843
Total revenue	$ 1,516	$ 1,400	$ 1,386	$ 1,394	$ 1,431	$ 1,380	$ 1,363	$ 1,331	5,696	5,505	5,254
Operating income	425	$ 370	$ 372	$ 365	375	$ 369	$ 362	$ 339	1,532	1,445	1,311
Total assets	10,289				9,743				10,289	9,743	9,340
Capital expenditures									287	290	359
Depreciation and amortization expense									433	411	417
Operating segments | Payments
Segment Reporting Information [Line Items]
Processing and services revenue									2,476	2,334	2,159
Product revenue									758	756	703
Total revenue									3,234	3,090	2,862
Operating income									1,034	943	840
Total assets	6,596				6,143				6,596	6,143	5,833
Capital expenditures									182	161	230
Depreciation and amortization expense									167	138	119
Operating segments | Financial
Segment Reporting Information [Line Items]
Processing and services revenue									2,347	2,285	2,256
Product revenue									183	192	187
Total revenue									2,530	2,477	2,443
Operating income									849	823	826
Total assets	3,309				3,287				3,309	3,287	3,242
Capital expenditures									95	125	119
Depreciation and amortization expense									83	89	76
Corporate and Other
Segment Reporting Information [Line Items]
Processing and services revenue									10	6	(4)
Product revenue									(78)	(68)	(47)
Total revenue									(68)	(62)	(51)
Operating income									(351)	(321)	(355)
Total assets	384				$ 313				384	313	265
Capital expenditures									10	4	10
Depreciation and amortization expense									183	$ 184	$ 222
Corporate and Other | Discontinued Operations, Held-for-sale
Segment Reporting Information [Line Items]
Total assets	$ 50								$ 50