Goodwill and Other Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Estimated Future Amortization Expense
2017	$ 31
2018	23
2019	23
2020	20
2021	19
Thereafter	130
Net Carrying Amount	246	$ 206
Core deposit intangibles
Schedule Of Estimated Future Amortization Expense
2017	14
2018	7
2019	7
2020	5
2021	4
Thereafter	12
Net Carrying Amount	49	68
Trade names
Schedule Of Estimated Future Amortization Expense
2017	3
2018	3
2019	3
2020	3
2021	3
Thereafter	72
Net Carrying Amount	87	90
Customer Relationships
Schedule Of Estimated Future Amortization Expense
2017	10
2018	9
2019	9
2020	9
2021	9
Thereafter	38
Net Carrying Amount	84	27
Other
Schedule Of Estimated Future Amortization Expense
2017	4
2018	4
2019	4
2020	3
2021	3
Thereafter	8
Net Carrying Amount	$ 26	$ 21