Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Securitizations and Other Variable Interest Entities - Other Variable Interest Entities (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
On-balance sheet assets            
Trading account assets $ 219,118   $ 209,358      
Debt securities carried at fair value 251,635   315,117      
Loans and leases 929,801   936,749      
Allowance for loan and lease losses (9,734) $ (10,050) (10,393) $ (10,693) $ (10,875) $ (11,237)
All other assets 125,795   135,043      
Total assets 2,338,833   2,281,234 $ 2,284,174    
On-balance sheet liabilities            
Long-term debt 234,100   227,402      
Total liabilities 2,076,675   2,014,088      
Consolidated VIEs            
On-balance sheet assets            
Trading account assets 6,145   6,521      
Loans and leases 44,163   48,929      
Allowance for loan and lease losses (920)   (1,016)      
All other assets 357   1,721      
Total assets 49,745   56,155      
On-balance sheet liabilities            
Long-term debt 11,024   9,873      
All other liabilities 39   37      
Total liabilities 11,968   10,222      
Other Variable Interest Entities            
Variable Interest Entity [Line Items]            
Maximum loss exposure 25,595   24,445      
On-balance sheet assets            
Trading account assets 2,923   3,055      
Debt securities carried at fair value 20   160      
Loans and leases 6,132   5,748      
Allowance for loan and lease losses (31)   (35)      
All other assets 15,362   15,305      
Total assets 24,406   24,233      
On-balance sheet liabilities            
Long-term debt 213   270      
All other liabilities 4,077   3,435      
Total liabilities 4,290   3,705      
Consolidated total assets of VIEs 4,629   4,947      
Unconsolidated total assets of VIEs 79,564   69,746      
Total assets of VIEs 84,193   74,693      
Other Variable Interest Entities | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 4,407   4,660      
On-balance sheet assets            
Trading account assets 2,592   2,709      
Debt securities carried at fair value 0   0      
Loans and leases 1,977   2,152      
Allowance for loan and lease losses (2)   (3)      
All other assets 62   89      
Total assets 4,629   4,947      
On-balance sheet liabilities            
Long-term debt 213   270      
All other liabilities 10   18      
Total liabilities 223   288      
Other Variable Interest Entities | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 21,188   19,785      
On-balance sheet assets            
Trading account assets 331   346      
Debt securities carried at fair value 20   160      
Loans and leases 4,155   3,596      
Allowance for loan and lease losses (29)   (32)      
All other assets 15,300   15,216      
Total assets 19,777   19,286      
On-balance sheet liabilities            
Long-term debt 0   0      
All other liabilities 4,067   3,417      
Total liabilities $ 4,067   $ 3,417