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
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
On-balance sheet assets        
Trading account assets $ 198,477 $ 209,358    
Debt securities carried at fair value 303,298 315,117    
Loans and leases 934,078 936,749    
Allowance for loan and lease losses (10,260) (10,393) $ (11,112) $ (11,237)
Loans held-for-sale 9,227 11,430    
All other assets 128,833 135,043    
Total assets 2,328,478 2,281,234 $ 2,247,794  
On-balance sheet liabilities        
Long-term debt 232,256 227,402    
Total liabilities 2,062,254 2,014,088    
Consolidated VIEs        
On-balance sheet assets        
Trading account assets 6,065 6,521    
Loans and leases 46,590 48,929    
Allowance for loan and lease losses (984) (1,016)    
Loans held-for-sale 13 27    
All other assets 399 1,694    
Total assets 52,083 56,155    
On-balance sheet liabilities        
Long-term debt 10,051 9,873    
All other liabilities 38 37    
Total liabilities 10,375 10,222    
Other Variable Interest Entities        
Variable Interest Entity [Line Items]        
Maximum loss exposure 25,604 24,445    
On-balance sheet assets        
Trading account assets 3,055 3,055    
Debt securities carried at fair value 130 160    
Loans and leases 6,435 5,748    
Allowance for loan and lease losses (34) (35)    
Loans held-for-sale 1,271 967    
All other assets 14,440 14,338    
Total assets 25,297 24,233    
On-balance sheet liabilities        
Long-term debt 308 270    
All other liabilities 3,526 3,435    
Total liabilities 3,834 3,705    
Consolidated total assets of VIEs 4,931 4,947    
Unconsolidated total assets of VIEs 75,401 69,746    
Total assets of VIEs 80,332 74,693    
Other Variable Interest Entities | Consolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 4,606 4,660    
On-balance sheet assets        
Trading account assets 2,679 2,709    
Debt securities carried at fair value 0 0    
Loans and leases 2,180 2,152    
Allowance for loan and lease losses (2) (3)    
Loans held-for-sale 13 27    
All other assets 61 62    
Total assets 4,931 4,947    
On-balance sheet liabilities        
Long-term debt 308 270    
All other liabilities 18 18    
Total liabilities 326 288    
Long-term debt with recourse to general corporation credit 1 1    
Other Variable Interest Entities | Unconsolidated VIEs        
Variable Interest Entity [Line Items]        
Maximum loss exposure 20,998 19,785    
On-balance sheet assets        
Trading account assets 376 346    
Debt securities carried at fair value 130 160    
Loans and leases 4,255 3,596    
Allowance for loan and lease losses (32) (32)    
Loans held-for-sale 1,258 940    
All other assets 14,379 14,276    
Total assets 20,366 19,286    
On-balance sheet liabilities        
Long-term debt 0 0    
All other liabilities 3,508 3,417    
Total liabilities $ 3,508 $ 3,417