Deposits and Borrowings Deposits and Borrowings - Schedule of Maturity Profile of Borrowing and Debt (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Time Deposits, Fiscal Year Maturity:
2016	$ 4,864
2017	2,080
2018	1,992
2019	1,544
2020	2,479
Thereafter	121
Total	13,080
Debt Fiscal Year Maturity:
Total Secured debt obligation	16,166	$ 11,624
Total, Fiscal Year Maturity:
2016	11,813
2017	12,415
2018	9,038
2019	6,516
2020	5,044
Thereafter	27,369
Total	72,195
Securitized debt obligations
Debt Fiscal Year Maturity:
2016	3,519
2017	7,234
2018	2,361
2019	1,136
2020	1,564
Thereafter	352
Federal funds purchased and securities loaned or sold under agreements to repurchase
Debt Fiscal Year Maturity:
2016	981
2017	0
2018	0
2019	0
2020	0
Thereafter	0
Total	981
Senior and Subordinated Notes
Debt Fiscal Year Maturity:
2016	2,430
2017	3,082
2018	4,674
2019	3,834
2020	0
Thereafter	7,817
Total	21,837
FHLB advances
Debt Fiscal Year Maturity:
2016	19
2017	19
2018	11
2019	2
2020	1,001
Thereafter	19,079
Total	$ 20,131