Goodwill and Purchased Intangible Assets - Goodwill by Segments (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,688
Accumulated Impairment, beginning balance	(169)
Total beginning balance	4,519
Acquired goodwill	51
Impairment	0
Other	5
Goodwill, ending balance	4,744
Accumulated Impairment, ending balance	(169)
Total ending balance	4,575
Payments & Network
Goodwill [Roll Forward]
Goodwill, beginning balance	988
Accumulated Impairment, beginning balance	0
Total beginning balance	988
Acquired goodwill	51
Impairment	0
Other	5
Goodwill, ending balance	1,044
Accumulated Impairment, ending balance	0
Total ending balance	1,044
Digital Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	595
Accumulated Impairment, beginning balance	0
Total beginning balance	595
Acquired goodwill	0
Impairment	0
Other	3
Goodwill, ending balance	598
Accumulated Impairment, ending balance	0
Total ending balance	598
Self-Service Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	1,635
Accumulated Impairment, beginning balance	(101)
Total beginning balance	1,534
Acquired goodwill	0
Impairment	0
Other	8
Goodwill, ending balance	1,643
Accumulated Impairment, ending balance	(101)
Total ending balance	1,542
Retail
Goodwill [Roll Forward]
Goodwill, beginning balance	1,015
Accumulated Impairment, beginning balance	(34)
Total beginning balance	981
Acquired goodwill	0
Impairment	0
Other	(9)
Goodwill, ending balance	1,006
Accumulated Impairment, ending balance	(34)
Total ending balance	972
Hospitality
Goodwill [Roll Forward]
Goodwill, beginning balance	292
Accumulated Impairment, beginning balance	(23)
Total beginning balance	269
Acquired goodwill	0
Impairment	0
Other	(2)
Goodwill, ending balance	290
Accumulated Impairment, ending balance	(23)
Total ending balance	267
Other
Goodwill [Roll Forward]
Goodwill, beginning balance	163
Accumulated Impairment, beginning balance	(11)
Total beginning balance	152
Acquired goodwill	0
Impairment	0
Other	0
Goodwill, ending balance	163
Accumulated Impairment, ending balance	(11)
Total ending balance	$ 152