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
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
On-balance sheet assets            
Trading account assets $ 210,319   $ 180,209      
Debt securities carried at fair value 316,864   313,660      
Loans and leases 927,117   906,683      
Allowance for loan and lease losses (10,693) $ (10,875) (11,237) $ (11,692) $ (11,837) $ (12,234)
Loans held-for-sale 13,243   9,066      
All other assets 128,569   120,709      
Total assets 2,283,896   2,187,702 $ 2,195,314    
On-balance sheet liabilities            
Long-term debt 228,666   216,823      
Total liabilities 2,011,437   1,920,862      
Consolidated VIEs            
On-balance sheet assets            
Trading account assets 5,142   5,773      
Loans and leases 50,022   56,001      
Allowance for loan and lease losses (1,023)   (1,032)      
Loans held-for-sale 66   188      
All other assets 662   1,596      
Total assets 54,869   62,526      
On-balance sheet liabilities            
Long-term debt 9,457   10,646      
All other liabilities 54   41      
Total liabilities 9,633   11,035      
Other Variable Interest Entities            
Variable Interest Entity [Line Items]            
Maximum loss exposure 25,074   23,868      
On-balance sheet assets            
Trading account assets 3,000   2,591      
Debt securities carried at fair value 197   122      
Loans and leases 6,987   6,648      
Allowance for loan and lease losses (41)   (33)      
Loans held-for-sale 909   652      
All other assets 13,848   13,525      
Total assets 24,900   23,505      
On-balance sheet liabilities            
Long-term debt 256   395      
All other liabilities 3,178   2,983      
Total liabilities 3,434   3,378      
Consolidated total assets of VIEs 5,673   6,305      
Unconsolidated total assets of VIEs 69,817   62,269      
Total assets of VIEs 75,490   68,574      
Other Variable Interest Entities | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 5,398   6,114      
On-balance sheet assets            
Trading account assets 2,697   2,358      
Debt securities carried at fair value 0   0      
Loans and leases 2,787   3,399      
Allowance for loan and lease losses (8)   (9)      
Loans held-for-sale 66   188      
All other assets 131   369      
Total assets 5,673   6,305      
On-balance sheet liabilities            
Long-term debt 256   395      
All other liabilities 32   24      
Total liabilities 288   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 19,676   17,754      
On-balance sheet assets            
Trading account assets 303   233      
Debt securities carried at fair value 197   122      
Loans and leases 4,200   3,249      
Allowance for loan and lease losses (33)   (24)      
Loans held-for-sale 843   464      
All other assets 13,717   13,156      
Total assets 19,227   17,200      
On-balance sheet liabilities            
Long-term debt 0   0      
All other liabilities 3,146   2,959      
Total liabilities $ 3,146   $ 2,959