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, 2018
Mar. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
On-balance sheet assets            
Trading account assets $ 203,420   $ 209,358      
Debt securities carried at fair value 275,256   315,117      
Loans and leases 935,824   936,749      
Allowance for loan and lease losses (10,050) $ (10,260) (10,393) $ (10,875) $ (11,112) $ (11,237)
Loans held-for-sale 6,511   11,430      
All other assets 130,288   135,043      
Total assets 2,291,670   2,281,234 $ 2,254,714    
On-balance sheet liabilities            
Long-term debt 226,595   227,402      
Total liabilities 2,027,454   2,014,088      
Consolidated VIEs            
On-balance sheet assets            
Trading account assets 5,692   6,521      
Loans and leases 45,483   48,929      
Allowance for loan and lease losses (959)   (1,016)      
Loans held-for-sale 3   27      
All other assets 396   1,694      
Total assets 50,615   56,155      
On-balance sheet liabilities            
Long-term debt 9,865   9,873      
All other liabilities 39   37      
Total liabilities 10,300   10,222      
Other Variable Interest Entities            
Variable Interest Entity [Line Items]            
Maximum loss exposure 25,578   24,445      
On-balance sheet assets            
Trading account assets 3,128   3,055      
Debt securities carried at fair value 61   160      
Loans and leases 6,691   5,748      
Allowance for loan and lease losses (32)   (35)      
Loans held-for-sale 391   967      
All other assets 15,073   14,338      
Total assets 25,312   24,233      
On-balance sheet liabilities            
Long-term debt 174   270      
All other liabilities 3,991   3,435      
Total liabilities 4,165   3,705      
Consolidated total assets of VIEs 4,551   4,947      
Unconsolidated total assets of VIEs 86,070   69,746      
Total assets of VIEs 90,621   74,693      
Other Variable Interest Entities | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 4,369   4,660      
On-balance sheet assets            
Trading account assets 2,472   2,709      
Debt securities carried at fair value 0   0      
Loans and leases 2,024   2,152      
Allowance for loan and lease losses (3)   (3)      
Loans held-for-sale 3   27      
All other assets 55   62      
Total assets 4,551   4,947      
On-balance sheet liabilities            
Long-term debt 174   270      
All other liabilities 9   18      
Total liabilities 183   288      
Other Variable Interest Entities | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 21,209   19,785      
On-balance sheet assets            
Trading account assets 656   346      
Debt securities carried at fair value 61   160      
Loans and leases 4,667   3,596      
Allowance for loan and lease losses (29)   (32)      
Loans held-for-sale 388   940      
All other assets 15,018   14,276      
Total assets 20,761   19,286      
On-balance sheet liabilities            
Long-term debt 0   0      
All other liabilities 3,982   3,417      
Total liabilities $ 3,982   $ 3,417