Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Variable Interest Entity [Line Items]      
Total assets $ 2,354,507 $ 2,281,234  
Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 49,073 56,155  
Customer Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure 2,100 2,300  
Collateralized Debt Obligations      
Variable Interest Entity [Line Items]      
Maximum loss exposure 421 358  
Investment Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure 7,200 5,700  
Investment Vehicles | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 270 249  
Investment Vehicles | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 37,700 20,300  
Leveraged Lease Trusts | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 1,800 2,000  
Tax Credit Vehicles      
Investments in Affordable Housing Projects [Abstract]      
Unfunded commitments $ 3,800 3,100  
Unfunded commitment payment period 5 years    
Tax credits and other benefits $ 981 1,000 $ 1,100
Expected tax benefits recognized, as a percentage 25.00%    
Tax Credit Vehicles | Other income      
Investments in Affordable Housing Projects [Abstract]      
Pretax losses $ 798 766 $ 789
Tax Credit Vehicles | Other assets      
Investments in Affordable Housing Projects [Abstract]      
Investments in affordable housing project investments 8,900 8,000  
Tax Credit Vehicles | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Maximum loss exposure $ 17,000 $ 13,800