Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities (Details)

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Securitizations and Other Variable Interest Entities - Other Variable Interest Entities (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
On-balance sheet assets            
Trading account assets $ 216,369   $ 180,209      
Debt securities carried at fair value 315,509   313,660      
Loans and leases 916,666   906,683      
Allowance for loan and lease losses (10,875) $ (11,112) (11,237) $ (11,837) $ (12,069) $ (12,234)
Loans held-for-sale 5,882   9,066      
All other assets 124,397   120,709      
Total assets 2,254,529   2,187,702 $ 2,186,966    
On-balance sheet liabilities            
Long-term debt 223,923   216,823      
Total liabilities 1,983,542   1,920,862      
Other Variable Interest Entities            
Variable Interest Entity [Line Items]            
Maximum loss exposure 23,533   23,868      
On-balance sheet assets            
Trading account assets 2,747   2,591      
Debt securities carried at fair value 231   122      
Loans and leases 6,688   6,648      
Allowance for loan and lease losses (38)   (33)      
Loans held-for-sale 195   652      
All other assets 13,561   13,525      
Total assets 23,384   23,505      
On-balance sheet liabilities            
Long-term debt 210   395      
All other liabilities 3,088   2,983      
Total liabilities 3,298   3,378      
Consolidated total assets of VIEs 5,648   6,305      
Unconsolidated total assets of VIEs 66,088   62,269      
Total assets of VIEs 71,736   68,574      
Other Variable Interest Entities | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 5,428   6,114      
On-balance sheet assets            
Trading account assets 2,470   2,358      
Debt securities carried at fair value 0   0      
Loans and leases 2,942   3,399      
Allowance for loan and lease losses (8)   (9)      
Loans held-for-sale 93   188      
All other assets 151   369      
Total assets 5,648   6,305      
On-balance sheet liabilities            
Long-term debt 210   395      
All other liabilities 23   24      
Total liabilities 233   419      
Long-term debt with recourse to general corporation credit 13   229      
Other Variable Interest Entities | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 18,105   17,754      
On-balance sheet assets            
Trading account assets 277   233      
Debt securities carried at fair value 231   122      
Loans and leases 3,746   3,249      
Allowance for loan and lease losses (30)   (24)      
Loans held-for-sale 102   464      
All other assets 13,410   13,156      
Total assets 17,736   17,200      
On-balance sheet liabilities            
Long-term debt 0   0      
All other liabilities 3,065   2,959      
Total liabilities $ 3,065   $ 2,959