Segment Information and Concentrations - Revenue and Operating Income By Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 1,503	$ 1,536
Income (loss) from operations	77	100
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	1,503	1,536
Segment operating income	104	147
Segment Reconciling Items
Segment Reporting Information [Line Items]
Transformation and restructuring costs	5	26
Acquisition-related amortization of intangible assets	22	21
Other adjustments	27	47
Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	763	758
Segment operating income	103	95
Retail | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	472	511
Segment operating income	5	26
Hospitality | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	169	193
Segment operating income	(9)	16
Other | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	99	74
Segment operating income	$ 5	$ 10