Goodwill and Other Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Estimated Future Amortization Expense
2017	$ 26
2018	25
2019	22
2020	22
2021	19
Thereafter	171
Net Carrying Amount	285	$ 313
Core deposit intangibles
Schedule Of Estimated Future Amortization Expense
2017	6
2018	5
2019	4
2020	4
2021	2
Thereafter	7
Net Carrying Amount	28	35
Trade names
Schedule Of Estimated Future Amortization Expense
2017	3
2018	3
2019	3
2020	3
2021	3
Thereafter	64
Net Carrying Amount	79	84
Customer Relationships
Schedule Of Estimated Future Amortization Expense
2017	16
2018	16
2019	15
2020	15
2021	14
Thereafter	99
Net Carrying Amount	175	191
Other
Schedule Of Estimated Future Amortization Expense
2017	1
2018	1
2019	0
2020	0
2021	0
Thereafter	1
Net Carrying Amount	$ 3	$ 3