Deposits and Borrowings Deposits and Borrowings - Schedule of Maturity Profile of Borrowing and Debt (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Time Deposits, Fiscal Year Maturity:
2017	$ 6,543
2018	5,095
2019	2,740
2020	3,268
2021	1,928
Thereafter	250
Total	19,824
Debt Fiscal Year Maturity:
Secured Debt	18,826	$ 16,166
Total, Fiscal Year Maturity:
2017	17,601
2018	12,155
2019	15,330
2020	5,831
2021	12,751
Thereafter	16,616
Total	80,284
Securitized debt obligations
Debt Fiscal Year Maturity:
2017	7,233
2018	2,366
2019	5,637
2020	1,562
2021	1,698
Thereafter	330
Federal funds purchased and securities loaned or sold under agreements to repurchase
Debt Fiscal Year Maturity:
2017	992
2018	0
2019	0
2020	0
2021	0
Thereafter	0
Total	992
Senior and Subordinated Notes
Debt Fiscal Year Maturity:
2017	2,814
2018	4,684
2019	5,701
2020	0
2021	3,474
Thereafter	6,758
Total	23,431
FHLB advances
Debt Fiscal Year Maturity:
2017	19
2018	10
2019	1,252
2020	1,001
2021	5,651
Thereafter	9,278
Total	$ 17,211