Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - CDO Vehicle (Details)

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Securitizations and Other Variable Interest Entities - CDO Vehicle (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
On Balance Sheet Assets [Abstract]      
Derivative assets $ 56,772 $ 53,497  
Other Assets 127,880 150,112  
Total assets 2,123,320 2,209,974 2,160,854
On Balance Sheet Liabilities [Abstract]      
Long-term debt 262,480 275,585  
Total liabilities 1,892,288 1,973,018  
Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 2,503 3,577  
On Balance Sheet Assets [Abstract]      
Trading account assets 1,599 2,449  
Derivative assets 190 311  
Other Assets 68 76  
Total assets 1,857 2,836  
On Balance Sheet Liabilities [Abstract]      
Other Liabilities 7 9  
Long-term debt 1,548 2,808  
Total liabilities 1,555 2,817  
Total assets of VIEs 26,236 29,186  
In Text Details [Abstract]      
Notional Amount Of Liquidity Exposure 1,500    
Consolidated VIEs [Member]
      
On Balance Sheet Assets [Abstract]      
Derivative assets 173 333  
Other Assets 3,927 4,654  
Total assets 122,371 134,431  
On Balance Sheet Liabilities [Abstract]      
Other Liabilities 390 360  
Long-term debt 25,946 34,256  
Total liabilities 27,757 38,347  
Consolidated VIEs [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 1,304 2,201  
On Balance Sheet Assets [Abstract]      
Trading account assets 1,310 2,191  
Derivative assets 0 10  
Other Assets 0 0  
Total assets 1,310 2,201  
On Balance Sheet Liabilities [Abstract]      
Other Liabilities 0 0  
Long-term debt 1,548 2,806  
Total liabilities 1,548 2,806  
Consolidated, Total assets of VIEs 1,310 2,201  
Unconsolidated VIEs [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 1,199 1,376  
On Balance Sheet Assets [Abstract]      
Trading account assets 289 258  
Derivative assets 190 301  
Other Assets 68 76  
Total assets 547 635  
On Balance Sheet Liabilities [Abstract]      
Other Liabilities 7 9  
Long-term debt 0 2  
Total liabilities 7 11  
Unconsolidated, Total assets of VIEs 24,926 26,985  
Super Senior Collateralized Debt Obligation [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 142    
In Text Details [Abstract]      
Notional Amount Of Liquidity Exposure 91    
Non-Super Senior Collateralized Debt Obligation [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 1,100    
In Text Details [Abstract]      
Notional Amount Of Liquidity Exposure $ 1,400