Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Home Equity Loans (Details)

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Securitizations and Other Variable Interest Entities - Home Equity Loans (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
On-balance sheet assets            
Trading account assets $ 189,106   $ 191,785      
Debt securities carried at fair value 332,307   320,695      
Loans and leases 886,449   881,391      
Allowance for loan and lease losses (13,068) $ (13,676) (14,419) $ (15,811) $ (16,618) $ (17,428)
All other assets 113,175   112,063      
Total assets 2,149,034   2,104,534 $ 2,170,557    
On-balance sheet liabilities            
Long-term debt 243,414   243,139      
Total liabilities 1,897,375   1,861,063      
Home equity            
Variable Interest Entity [Line Items]            
Maximum loss exposure 5,808   6,215      
On-balance sheet assets            
Trading account assets 69   14      
Debt securities carried at fair value 114   39      
Loans and leases 891   1,014      
Allowance for loan and lease losses (50)   (56)      
All other assets 39   33      
Total assets 1,063   1,044      
On-balance sheet liabilities            
Long-term debt 933   1,076      
Total liabilities 933   1,076      
Principal amount outstanding 6,760   7,376      
Trust certificates outstanding 5,700   6,300      
Remaining borrowing capacity on home equity line 27   39      
Home equity | Consolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 880   991      
On-balance sheet assets            
Trading account assets 0   0      
Debt securities carried at fair value 0   0      
Loans and leases 891   1,014      
Allowance for loan and lease losses (50)   (56)      
All other assets 39   33      
Total assets 880   991      
On-balance sheet liabilities            
Long-term debt 933   1,076      
Total liabilities 933   1,076      
Principal amount outstanding 891   1,014      
Home equity | Unconsolidated VIEs            
Variable Interest Entity [Line Items]            
Maximum loss exposure 4,928   5,224      
On-balance sheet assets            
Trading account assets 69   14      
Debt securities carried at fair value 114   39      
Loans and leases 0   0      
Allowance for loan and lease losses 0   0      
All other assets 0   0      
Total assets 183   53      
On-balance sheet liabilities            
Long-term debt 0   0      
Total liabilities 0   0      
Principal amount outstanding $ 5,869   $ 6,362