Goodwill and Long-Lived Assets - Goodwill by Segments (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 2,861
Accumulated Impairment Losses	(169)
Total	2,692
Additions	16
Impairment	0
Other	(1)
Goodwill	2,876
Accumulated Impairment Losses	(169)
Total	2,707
Banking
Goodwill [Roll Forward]
Goodwill	1,718
Accumulated Impairment Losses	(101)
Total	1,617
Additions	0
Impairment	0
Other	(1)
Goodwill	1,717
Accumulated Impairment Losses	(101)
Total	1,616
Retail
Goodwill [Roll Forward]
Goodwill	571
Accumulated Impairment Losses	(34)
Total	537
Additions	5
Impairment	0
Other	0
Goodwill	576
Accumulated Impairment Losses	(34)
Total	542
Hospitality
Goodwill [Roll Forward]
Goodwill	385
Accumulated Impairment Losses	(23)
Total	362
Additions	11
Impairment	0
Other	0
Goodwill	396
Accumulated Impairment Losses	(23)
Total	373
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