Segment Information and Concentrations - Revenue and Operating Income By Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 2,017	$ 1,972	$ 5,894	$ 5,835
Russia Conflict
Segment Reporting Information [Line Items]
Total revenue	0	0	0	9
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	1,976	1,926	5,768	5,671
Adjusted EBITDA by segment	538	503	1,462	1,322
Other
Segment Reporting Information [Line Items]
Total revenue	53	58	161	187
Eliminations
Segment Reporting Information [Line Items]
Total revenue	(12)	(12)	(35)	(32)
Retail | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	568	575	1,696	1,683
Adjusted EBITDA by segment	132	128	352	299
Hospitality | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	238	238	696	687
Adjusted EBITDA by segment	59	51	172	138
Digital Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	147	137	423	404
Adjusted EBITDA by segment	58	60	160	172
Payments & Network | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	357	336	1,013	967
Adjusted EBITDA by segment	120	114	302	309
Self-Service Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	666	640	1,940	1,930
Adjusted EBITDA by segment	$ 169	$ 150	$ 476	$ 404