Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Variable Interest Entity [Line Items]      
Total assets $ 2,377,164 $ 2,328,478 $ 2,354,507
Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 46,429   49,073
Customer Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure 2,000   2,100
Collateralized Debt Obligations      
Variable Interest Entity [Line Items]      
Maximum loss exposure 319   421
Investment Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure 7,300   7,200
Investment Vehicles | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 188   270
Investment Vehicles | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 34,900   37,700
Leveraged Lease Trusts | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 1,800   1,800
Tax Credit Vehicles      
Investments in Affordable Housing Projects [Abstract]      
Unfunded commitments $ 3,700   3,800
Unfunded commitment payment period 5 years    
Tax credits and other benefits $ 280 248  
Expected tax benefits recognized, as a percentage 25.00%    
Tax Credit Vehicles | Other income      
Investments in Affordable Housing Projects [Abstract]      
Pretax losses $ 248 $ 208  
Tax Credit Vehicles | Other assets      
Investments in Affordable Housing Projects [Abstract]      
Investments in affordable housing project investments 8,700   8,900
Tax Credit Vehicles | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Maximum loss exposure $ 16,800   $ 17,000