Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details)

v3.7.0.1
Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Variable Interest Entity [Line Items]          
Total assets $ 2,254,529 $ 2,186,966 $ 2,254,529 $ 2,186,966 $ 2,187,702
Customer Vehicles          
Variable Interest Entity [Line Items]          
Maximum loss exposure 2,200   2,200   2,900
Liquidity commitments to unconsolidated securitization trusts 41   41   323
Collateralized Debt Obligations          
Variable Interest Entity [Line Items]          
Maximum loss exposure 508   508   430
Investment Vehicles          
Variable Interest Entity [Line Items]          
Maximum loss exposure 4,900   4,900   5,100
Investment Vehicles | Consolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets 626   626   846
Investment Vehicles | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Maximum loss exposure 90   90   150
Total assets 21,200   21,200   17,300
Consolidated total assets of VIEs 58   58   75
Leveraged Lease Trusts | Consolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets 2,400   2,400   2,600
Tax Credit Vehicles          
Investments in Affordable Housing Projects [Abstract]          
Unfunded commitments 2,700   $ 2,700   2,700
Unfunded commitment payment period     5 years    
Tax credits and other benefits 281 289 $ 532 482  
Expected tax benefits recognized, as a percentage     25.00%    
Tax Credit Vehicles | Other assets          
Investments in Affordable Housing Projects [Abstract]          
Investments in affordable housing project investments 7,500   $ 7,500   7,400
Tax Credit Vehicles | Other income          
Investments in Affordable Housing Projects [Abstract]          
Pretax losses 207 $ 198 403 $ 396  
Tax Credit Vehicles | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets $ 13,300   $ 13,300   $ 12,600