Segment Information and Concentrations - Revenue and Operating Income By Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 1,986	$ 1,997	$ 3,877	$ 3,863
Adjusted EBITDA by segment	504	445	924	819
Russia Conflict
Segment Reporting Information [Line Items]
Total revenue	0	6	0	9
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	1,945	1,942	3,792	3,745
Adjusted EBITDA by segment	504	445	924	819
Other
Segment Reporting Information [Line Items]
Total revenue	54	61	108	129
Eliminations
Segment Reporting Information [Line Items]
Total revenue	(13)	(12)	(23)	(20)
Retail | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	576	562	1,128	1,108
Adjusted EBITDA by segment	123	104	220	171
Hospitality | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	235	238	458	449
Adjusted EBITDA by segment	60	46	113	87
Digital Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	140	131	276	267
Adjusted EBITDA by segment	53	56	102	112
Payments & Network | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	333	332	656	631
Adjusted EBITDA by segment	99	97	182	195
Self-Service Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	661	679	1,274	1,290
Adjusted EBITDA by segment	$ 169	$ 142	$ 307	$ 254