Segment Information and Concentrations - Revenue and Operating Income By Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 1,536	$ 1,517
Income from operations	100	109
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	1,536	1,517
Segment operating income	147	148
Segment Reconciling Items
Segment Reporting Information [Line Items]
Transformation and restructuring costs	26	16
Acquisition-related amortization of intangible assets	21	23
Other adjustments	47	39
Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	758	721
Segment operating income	95	84
Retail | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	511	521
Segment operating income	26	35
Hospitality | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	193	204
Segment operating income	16	19
Other | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	74	71
Segment operating income	$ 10	$ 10