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 $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2011
On Balance Sheet Assets [Abstract]                
Loans and leases $ 934,392,000,000   $ 934,392,000,000     $ 907,819,000,000    
Allowance for loan and lease losses (19,432,000,000) (26,233,000,000) (19,432,000,000) (26,233,000,000) (21,235,000,000) (24,179,000,000) (30,288,000,000) (33,783,000,000)
Total assets 2,126,653,000,000 2,166,162,000,000 2,126,653,000,000 2,166,162,000,000   2,209,974,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 255,331,000,000   255,331,000,000     275,585,000,000    
Total liabilities 1,894,371,000,000   1,894,371,000,000     1,973,018,000,000    
In Text Details [Abstract]                
Remaining Borrowing Capacity On Home Equity Line 83,000,000   83,000,000     196,000,000    
Repurchase of loans from home equity securitization trusts 81,000,000 22,000,000 197,000,000 60,000,000        
Total assets of home equity securitization trusts transferred     475,000,000          
Total liabilities of home equity securitization trusts transferred     616,000,000          
Gains related to deconsolidation of home equity securitization trusts     141,000,000          
Consolidated VIEs [Member]
                
On Balance Sheet Assets [Abstract]                
Loans and leases 109,996,000,000   109,996,000,000     123,227,000,000    
Allowance for loan and lease losses (2,962,000,000)   (2,962,000,000)     (3,658,000,000)    
Total assets 122,165,000,000   122,165,000,000     134,431,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 24,481,000,000   24,481,000,000     34,256,000,000    
Other Liabilities 382,000,000   382,000,000     360,000,000    
Total liabilities 27,043,000,000   27,043,000,000     38,347,000,000    
Home Equity [Member]
                
Variable Interest Entity [Line Items]                
Maximum loss exposure 7,757,000,000 [1]   7,757,000,000 [1]     8,711,000,000 [1]    
On Balance Sheet Assets [Abstract]                
Trading account assets 23,000,000   23,000,000     8,000,000    
AFS Debt Securities 19,000,000   19,000,000     14,000,000    
Loans and leases 1,406,000,000   1,406,000,000     2,197,000,000    
Allowance for loan and lease losses (89,000,000)   (89,000,000)     (193,000,000)    
Total assets 1,359,000,000   1,359,000,000     2,026,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 1,503,000,000   1,503,000,000     2,331,000,000    
Other Liabilities 88,000,000   88,000,000     92,000,000    
Total liabilities 1,591,000,000   1,591,000,000     2,423,000,000    
Principal balance outstanding 8,235,000,000   8,235,000,000     14,841,000,000    
In Text Details [Abstract]                
Trust certificates outstanding 7,900,000,000   7,900,000,000     9,000,000,000    
Reserve For Losses For Home Equity Securitizations 15,000,000   15,000,000     51,000,000    
Servicing Fees, Net 11,000,000 14,000,000 37,000,000 45,000,000        
Home Equity [Member] | Consolidated VIEs [Member]
                
Variable Interest Entity [Line Items]                
Maximum loss exposure 1,317,000,000 [1]   1,317,000,000 [1]     2,004,000,000 [1]    
On Balance Sheet Assets [Abstract]                
Trading account assets 0   0     0    
AFS Debt Securities 0   0     0    
Loans and leases 1,406,000,000   1,406,000,000     2,197,000,000    
Allowance for loan and lease losses (89,000,000)   (89,000,000)     (193,000,000)    
Total assets 1,317,000,000   1,317,000,000     2,004,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 1,503,000,000   1,503,000,000     2,331,000,000    
Other Liabilities 88,000,000   88,000,000     92,000,000    
Total liabilities 1,591,000,000   1,591,000,000     2,423,000,000    
Principal balance outstanding 1,406,000,000   1,406,000,000     2,197,000,000    
Home Equity [Member] | Unconsolidated VIEs [Member]
                
Variable Interest Entity [Line Items]                
Maximum loss exposure 6,440,000,000 [1]   6,440,000,000 [1]     6,707,000,000 [1]    
On Balance Sheet Assets [Abstract]                
Trading account assets 23,000,000   23,000,000     8,000,000    
AFS Debt Securities 19,000,000   19,000,000     14,000,000    
Loans and leases 0   0     0    
Allowance for loan and lease losses 0   0     0    
Total assets 42,000,000   42,000,000     22,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 0   0     0    
Other Liabilities 0   0     0    
Total liabilities 0   0     0    
Principal balance outstanding $ 6,829,000,000   $ 6,829,000,000     $ 12,644,000,000    
[1] For unconsolidated VIEs, the maximum loss exposure includes outstanding trust certificates issued by trusts in rapid amortization, net of recorded reserves, and excludes the liability for representations and warranties obligations and corporate guarantees.