Goodwill and Long-Lived Assets - Goodwill by Segments (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 3,001
Accumulated Impairment Losses	(169)
Total	2,832
Additions	3
Impairment	0
Other	(12)
Goodwill	2,992
Accumulated Impairment Losses	(169)
Total	2,823
Banking
Goodwill [Roll Forward]
Goodwill	1,774
Accumulated Impairment Losses	(101)
Total	1,673
Additions	0
Impairment	0
Other	(6)
Goodwill	1,768
Accumulated Impairment Losses	(101)
Total	1,667
Retail
Goodwill [Roll Forward]
Goodwill	638
Accumulated Impairment Losses	(34)
Total	604
Additions	0
Impairment	0
Other	(4)
Goodwill	634
Accumulated Impairment Losses	(34)
Total	600
Hospitality
Goodwill [Roll Forward]
Goodwill	402
Accumulated Impairment Losses	(23)
Total	379
Additions	3
Impairment	0
Other	(2)
Goodwill	403
Accumulated Impairment Losses	(23)
Total	380
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