Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Variable Interest Entity [Line Items]          
Total assets $ 2,283,896 $ 2,195,314 $ 2,283,896 $ 2,195,314 $ 2,187,702
Consolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets 54,869   54,869   62,526
Customer Vehicles          
Variable Interest Entity [Line Items]          
Maximum loss exposure 2,400   2,400   2,900
Liquidity commitments to unconsolidated securitization trusts 55   55   323
Collateralized Debt Obligations          
Variable Interest Entity [Line Items]          
Maximum loss exposure 428   428   430
Investment Vehicles          
Variable Interest Entity [Line Items]          
Maximum loss exposure 6,400   6,400   5,100
Investment Vehicles | Consolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets 683   683   846
Investment Vehicles | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Maximum loss exposure 90   90   150
Total assets 24,100   24,100   17,300
Consolidated total assets of VIEs 45   45   75
Leveraged Lease Trusts | Consolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets 2,300   2,300   2,600
Tax Credit Vehicles          
Investments in Affordable Housing Projects [Abstract]          
Unfunded commitments 2,800   $ 2,800   2,700
Unfunded commitment payment period     5 years    
Tax credits and other benefits 293 337 $ 825 819  
Expected tax benefits recognized, as a percentage     25.00%    
Tax Credit Vehicles | Other income          
Investments in Affordable Housing Projects [Abstract]          
Pretax losses 209 $ 200 $ 612 $ 596  
Tax Credit Vehicles | Other assets          
Investments in Affordable Housing Projects [Abstract]          
Investments in affordable housing project investments 7,600   7,600   7,400
Tax Credit Vehicles | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Total assets $ 13,400   $ 13,400   $ 12,600