Goodwill and Long-Lived Assets - Goodwill by Segments (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 3,001
Accumulated Impairment Losses	(169)
Total	2,832
Additions	1
Impairment	0
Other	(5)
Goodwill	2,997
Accumulated Impairment Losses	(169)
Total	2,828
Banking
Goodwill [Roll Forward]
Goodwill	1,774
Accumulated Impairment Losses	(101)
Total	1,673
Additions	0
Impairment	0
Other	(4)
Goodwill	1,770
Accumulated Impairment Losses	(101)
Total	1,669
Retail
Goodwill [Roll Forward]
Goodwill	638
Accumulated Impairment Losses	(34)
Total	604
Additions	0
Impairment	0
Other	0
Goodwill	638
Accumulated Impairment Losses	(34)
Total	604
Hospitality
Goodwill [Roll Forward]
Goodwill	402
Accumulated Impairment Losses	(23)
Total	379
Additions	1
Impairment	0
Other	(1)
Goodwill	402
Accumulated Impairment Losses	(23)
Total	379
Other
Goodwill [Roll Forward]
Goodwill	187
Accumulated Impairment Losses	(11)
Total	176
Additions	0
Impairment	0
Other	0
Goodwill	187
Accumulated Impairment Losses	(11)
Total	$ 176