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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 3,465	$ 1,512	$ 7,234	$ 3,014
Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	1,223	0	2,624	0
Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	714	731	1,432	1,456
Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	1,320	662	2,706	1,313
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	$ 208	$ 119	$ 472	$ 245
Geographic Concentration Risk | Foreign Tax Authority | Sales Revenue, Net
Disaggregation of Revenue [Line Items]
Percentage of concentration risk	12.00%	6.00%	13.00%	6.00%
Processing
Disaggregation of Revenue [Line Items]
Revenue	$ 2,463	$ 904	$ 5,112	$ 1,800
Processing | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	1,038		2,221
Processing | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	349	342	700	684
Processing | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	1,063	516	2,153	1,027
Processing | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	13	46	38	89
Hardware, print and card production
Disaggregation of Revenue [Line Items]
Revenue	328	86	725	173
Hardware, print and card production | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	159		352
Hardware, print and card production | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	9	11	21	23
Hardware, print and card production | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	160	75	352	150
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	181	153	354	291
Professional services | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	8		11
Professional services | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	115	125	227	238
Professional services | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	58	26	115	49
Professional services | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	0	2	1	4
Software maintenance
Disaggregation of Revenue [Line Items]
Revenue	141	147	285	295
Software maintenance | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	0		0
Software maintenance | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	141	143	282	286
Software maintenance | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	0	0	1	1
Software maintenance | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	0	4	2	8
License and termination fees
Disaggregation of Revenue [Line Items]
Revenue	76	78	150	151
License and termination fees | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	6		12
License and termination fees | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	52	60	98	120
License and termination fees | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	18	18	40	31
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	198	67	433	144
Output solutions postage | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	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	198	67	433	144
Other
Disaggregation of Revenue [Line Items]
Revenue	78	77	175	160
Other | Operating segments | Acceptance
Disaggregation of Revenue [Line Items]
Revenue	12		28
Other | Operating segments | Fintech
Disaggregation of Revenue [Line Items]
Revenue	48	50	104	105
Other | Operating segments | Payments
Disaggregation of Revenue [Line Items]
Revenue	21	27	45	55
Other | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	$ (3)	$ 0	$ (2)	$ 0

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