GOODWILL AND PURCHASED INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,688	$ 3,006
Accumulated impairment, beginning balance	(169)	(169)
Total beginning balance	4,519	2,837
Acquired goodwill	49	1,687
Impairment	0	0
Other	(28)	(5)
Goodwill, ending balance	4,709	4,688
Accumulated impairment, ending balance	(169)	(169)
Total ending balance	4,540	4,519
Retail
Goodwill [Roll Forward]
Goodwill, beginning balance	1,015	980
Accumulated impairment, beginning balance	(34)	(34)
Total beginning balance	981	946
Acquired goodwill	0	37
Impairment	0	0
Other	(20)	(2)
Goodwill, ending balance	995	1,015
Accumulated impairment, ending balance	(34)	(34)
Total ending balance	961	981
Hospitality
Goodwill [Roll Forward]
Goodwill, beginning balance	292	284
Accumulated impairment, beginning balance	(23)	(23)
Total beginning balance	269	261
Acquired goodwill	0	11
Impairment	0	0
Other	(4)	(3)
Goodwill, ending balance	288	292
Accumulated impairment, ending balance	(23)	(23)
Total ending balance	265	269
Digital Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	595	560
Accumulated impairment, beginning balance	0	0
Total beginning balance	595	560
Acquired goodwill	0	35
Impairment	0	0
Other	(1)	0
Goodwill, ending balance	594	595
Accumulated impairment, ending balance	0	0
Total ending balance	594	595
Payments & Network
Goodwill [Roll Forward]
Goodwill, beginning balance	988	360
Accumulated impairment, beginning balance	0	0
Total beginning balance	988	360
Acquired goodwill	49	628
Impairment	0	0
Other	(1)	0
Goodwill, ending balance	1,036	988
Accumulated impairment, ending balance	0	0
Total ending balance	1,036	988
Self-Service Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	1,635	659
Accumulated impairment, beginning balance	(101)	(101)
Total beginning balance	1,534	558
Acquired goodwill	0	976
Impairment	0	0
Other	(2)	0
Goodwill, ending balance	1,633	1,635
Accumulated impairment, ending balance	(101)	(101)
Total ending balance	1,532	1,534
Corporate and Other
Goodwill [Roll Forward]
Goodwill, beginning balance	163	163
Accumulated impairment, beginning balance	(11)	(11)
Total beginning balance	152	152
Acquired goodwill	0	0
Impairment	0	0
Other	0	0
Goodwill, ending balance	163	163
Accumulated impairment, ending balance	(11)	(11)
Total ending balance	$ 152	$ 152