Goodwill and Other Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Estimated Future Amortization Expense
2015	$ 29
2016	24
2017	15
2018	14
2019	13
Thereafter	111
Total estimated amortization expense	206	$ 240
Core deposit intangibles
Schedule Of Estimated Future Amortization Expense
2015	18
2016	14
2017	7
2018	6
2019	5
Thereafter	18
Total estimated amortization expense	68	97
Trade names
Schedule Of Estimated Future Amortization Expense
2015	3
2016	3
2017	3
2018	3
2019	3
Thereafter	75
Total estimated amortization expense	90	93
Customer Relationships
Schedule Of Estimated Future Amortization Expense
2015	4
2016	4
2017	3
2018	3
2019	3
Thereafter	10
Total estimated amortization expense	27	35
Other
Schedule Of Estimated Future Amortization Expense
2015	4
2016	3
2017	2
2018	2
2019	2
Thereafter	8
Total estimated amortization expense	$ 21	$ 15