Goodwill and Other Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Estimated Future Amortization Expense
2017	$ 25
2018	22
2019	22
2020	19
2021	19
Thereafter	154
Net Carrying Amount	261	$ 285
Core deposit intangibles
Schedule Of Estimated Future Amortization Expense
2017	5
2018	4
2019	4
2020	2
2021	2
Thereafter	5
Net Carrying Amount	22	28
Trade names
Schedule Of Estimated Future Amortization Expense
2017	4
2018	3
2019	3
2020	3
2021	3
Thereafter	64
Net Carrying Amount	80	79
Customer Relationships
Schedule Of Estimated Future Amortization Expense
2017	16
2018	15
2019	15
2020	14
2021	14
Thereafter	85
Net Carrying Amount	159	175
Other
Schedule Of Estimated Future Amortization Expense
Net Carrying Amount	$ 0	$ 3