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, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Variable Interest Entity [Line Items]                
Collection reinvested in revolving period securitizations $ 0 $ 0 $ 0 $ 0        
On Balance Sheet Assets [Abstract]                
AFS Debt Securities 305,949,000,000   305,949,000,000     276,151,000,000    
Loans and leases 893,035,000,000   893,035,000,000     926,200,000,000    
Allowance for loan and lease losses (26,233,000,000) (35,082,000,000) (26,233,000,000) (35,082,000,000) (30,288,000,000) (33,783,000,000) (37,312,000,000) (41,885,000,000)
Total assets 2,166,162,000,000 2,219,628,000,000 2,166,162,000,000 2,219,628,000,000   2,129,046,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 286,534,000,000   286,534,000,000     372,265,000,000    
Total liabilities 1,927,556,000,000   1,927,556,000,000     1,898,945,000,000    
In Text Details [Abstract]                
Remaining Borrowing Capacity On Home Equity Line 297,000,000   297,000,000     460,000,000    
Repurchase of loans from home equity securitization trusts 22,000,000 6,000,000 60,000,000 11,000,000        
Consolidated VIEs [Member]
                
On Balance Sheet Assets [Abstract]                
Loans and leases 125,043,000,000   125,043,000,000     140,194,000,000    
Allowance for loan and lease losses (3,811,000,000)   (3,811,000,000)     (5,066,000,000)    
Total assets 137,656,000,000   137,656,000,000     151,761,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 38,055,000,000   38,055,000,000     49,054,000,000    
Other Liabilities 625,000,000   625,000,000     1,116,000,000    
Total liabilities 42,552,000,000   42,552,000,000     55,947,000,000    
Home Equity [Member]
                
Variable Interest Entity [Line Items]                
Maximum loss exposure 9,069,000,000   9,069,000,000     10,235,000,000    
On Balance Sheet Assets [Abstract]                
Trading account assets 4,000,000   4,000,000     5,000,000    
AFS Debt Securities 14,000,000   14,000,000     13,000,000    
Loans and leases 2,303,000,000   2,303,000,000     2,975,000,000    
Allowance for loan and lease losses 183,000,000   183,000,000     303,000,000    
Total assets 2,138,000,000   2,138,000,000     2,690,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 2,476,000,000   2,476,000,000     3,081,000,000    
Other Liabilities 85,000,000   85,000,000     66,000,000    
Total liabilities 2,561,000,000   2,561,000,000     3,147,000,000    
Principal balance outstanding 15,451,000,000   15,451,000,000     17,397,000,000    
In Text Details [Abstract]                
Trust certificates outstanding 9,400,000,000   9,400,000,000     10,700,000,000    
Reserve For Losses For Home Equity Securitizations 57,000,000   57,000,000     69,000,000    
Servicing Fees, Net 14,000,000 16,000,000 45,000,000 49,000,000        
Home Equity [Member] | Consolidated VIEs [Member]
                
Variable Interest Entity [Line Items]                
Maximum loss exposure 2,120,000,000 [1]   2,120,000,000 [1]     2,672,000,000 [1]    
On Balance Sheet Assets [Abstract]                
Trading account assets 0   0     0    
AFS Debt Securities 0   0     0    
Loans and leases 2,303,000,000   2,303,000,000     2,975,000,000    
Allowance for loan and lease losses (183,000,000)   (183,000,000)     (303,000,000)    
Total assets 2,120,000,000   2,120,000,000     2,672,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 2,476,000,000   2,476,000,000     3,081,000,000    
Other Liabilities 85,000,000   85,000,000     66,000,000    
Total liabilities 2,561,000,000   2,561,000,000     3,147,000,000    
Principal balance outstanding 2,303,000,000   2,303,000,000     2,975,000,000    
Home Equity [Member] | Unconsolidated VIEs [Member]
                
Variable Interest Entity [Line Items]                
Maximum loss exposure 6,949,000,000 [1]   6,949,000,000 [1]     7,563,000,000 [1]    
On Balance Sheet Assets [Abstract]                
Trading account assets 4,000,000   4,000,000     5,000,000    
AFS Debt Securities 14,000,000   14,000,000     13,000,000    
Loans and leases 0   0     0    
Allowance for loan and lease losses 0   0     0    
Total assets 18,000,000   18,000,000     18,000,000    
On Balance Sheet Liabilities [Abstract]                
Long-term debt 0   0     0    
Other Liabilities 0   0     0    
Total liabilities 0   0     0    
Principal balance outstanding $ 13,148,000,000   $ 13,148,000,000     $ 14,422,000,000    
[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.