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
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Variable Interest Entity [Line Items]        
Collection reinvested in revolving period securitizations $ 0 $ 0    
On Balance Sheet Assets [Abstract]        
Loans and leases 911,592,000,000   907,819,000,000  
Allowance for loan and lease losses (22,441,000,000) (32,211,000,000) (24,179,000,000) (33,783,000,000)
Total assets 2,174,819,000,000 2,181,449,000,000 2,209,974,000,000  
On Balance Sheet Liabilities [Abstract]        
Long-term debt 279,641,000,000   275,585,000,000  
Total liabilities 1,937,526,000,000   1,973,018,000,000  
In Text Details [Abstract]        
Remaining Borrowing Capacity On Home Equity Line 111,000,000   196,000,000  
Repurchase of loans from home equity securitization trusts 39,000,000 0    
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 116,236,000,000   123,227,000,000  
Allowance for loan and lease losses (3,310,000,000)   (3,658,000,000)  
Total assets 130,183,000,000   134,431,000,000  
On Balance Sheet Liabilities [Abstract]        
Long-term debt 31,461,000,000   34,256,000,000  
Other Liabilities 345,000,000   360,000,000  
Total liabilities 34,345,000,000   38,347,000,000  
Home Equity [Member]
       
Variable Interest Entity [Line Items]        
Maximum loss exposure 8,453,000,000   8,711,000,000  
On Balance Sheet Assets [Abstract]        
Trading account assets 8,000,000   8,000,000  
AFS Debt Securities 15,000,000   14,000,000  
Loans and leases 1,566,000,000   2,197,000,000  
Allowance for loan and lease losses 117,000,000   193,000,000  
Total assets 1,472,000,000   2,026,000,000  
On Balance Sheet Liabilities [Abstract]        
Long-term debt 1,649,000,000   2,331,000,000  
Other Liabilities 85,000,000   92,000,000  
Total liabilities 1,734,000,000   2,423,000,000  
Principal balance outstanding 12,498,000,000   14,841,000,000  
In Text Details [Abstract]        
Trust certificates outstanding 8,700,000,000   9,000,000,000  
Reserve For Losses For Home Equity Securitizations 48,000,000   51,000,000  
Servicing Fees, Net 13,000,000 17,000,000    
Home Equity [Member] | Consolidated VIEs [Member]
       
Variable Interest Entity [Line Items]        
Maximum loss exposure 1,449,000,000 [1]   2,004,000,000 [1]  
On Balance Sheet Assets [Abstract]        
Trading account assets 0   0  
AFS Debt Securities 0   0  
Loans and leases 1,566,000,000   2,197,000,000  
Allowance for loan and lease losses (117,000,000)   (193,000,000)  
Total assets 1,449,000,000   2,004,000,000  
On Balance Sheet Liabilities [Abstract]        
Long-term debt 1,649,000,000   2,331,000,000  
Other Liabilities 85,000,000   92,000,000  
Total liabilities 1,734,000,000   2,423,000,000  
Principal balance outstanding 1,566,000,000   2,197,000,000  
Home Equity [Member] | Unconsolidated VIEs [Member]
       
Variable Interest Entity [Line Items]        
Maximum loss exposure 7,004,000,000 [1]   6,707,000,000 [1]  
On Balance Sheet Assets [Abstract]        
Trading account assets 8,000,000   8,000,000  
AFS Debt Securities 15,000,000   14,000,000  
Loans and leases 0   0  
Allowance for loan and lease losses 0   0  
Total assets 23,000,000   22,000,000  
On Balance Sheet Liabilities [Abstract]        
Long-term debt 0   0  
Other Liabilities 0   0  
Total liabilities 0   0  
Principal balance outstanding $ 10,932,000,000   $ 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.