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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 4,163	$ 3,786	$ 11,969	$ 11,020
Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	1,716	1,454	4,779	4,078
Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	761	727	2,251	2,159
Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	1,471	1,387	4,297	4,093
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	$ 215	$ 218	$ 642	$ 690
Geographic Concentration Risk | Non-US | Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Percentage of concentration risk	14.00%	14.00%	14.00%	13.00%
Processing
Disaggregation of Revenue [Line Items]
Revenue	$ 2,971	$ 2,730	$ 8,553	$ 7,842
Processing | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	1,446	1,245	4,044	3,466
Processing | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	389	364	1,152	1,064
Processing | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	1,132	1,112	3,331	3,265
Processing | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	4	9	26	47
Hardware, print and card production
Disaggregation of Revenue [Line Items]
Revenue	478	367	1,336	1,092
Hardware, print and card production | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	232	179	636	531
Hardware, print and card production | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	10	12	33	33
Hardware, print and card production | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	236	176	667	528
Hardware, print and card production | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Professional services
Disaggregation of Revenue [Line Items]
Revenue	202	188	575	542
Professional services | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	12	9	30	20
Professional services | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	124	120	350	347
Professional services | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	66	59	195	174
Professional services | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	1
Software maintenance
Disaggregation of Revenue [Line Items]
Revenue	141	142	423	427
Software maintenance | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Software maintenance | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	139	141	417	423
Software maintenance | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	2	1	6	2
Software maintenance | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	2
License and termination fees
Disaggregation of Revenue [Line Items]
Revenue	73	69	209	219
License and termination fees | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	12	7	33	19
License and termination fees | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	45	41	133	139
License and termination fees | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	16	21	43	61
License and termination fees | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Output solutions postage
Disaggregation of Revenue [Line Items]
Revenue	209	207	616	640
Output solutions postage | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Output solutions postage | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Output solutions postage | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Output solutions postage | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	209	207	616	640
Other
Disaggregation of Revenue [Line Items]
Revenue	89	83	257	258
Other | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	14	14	36	42
Other | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	54	49	166	153
Other | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	19	18	55	63
Other | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	$ 2	$ 2	$ 0	$ 0

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