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
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
On Balance Sheet Assets [Abstract]      
Derivative assets $ 52,247 $ 53,497  
Other Assets 137,792 150,112  
Total assets 2,174,819 2,209,974 2,181,449
On Balance Sheet Liabilities [Abstract]      
Derivative Liabilities 47,825 46,016  
Long-term debt 279,641 275,585  
Total liabilities 1,937,526 1,973,018  
Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 3,627 3,577  
On Balance Sheet Assets [Abstract]      
Trading account assets 2,632 2,449  
Derivative assets 233 311  
Other Assets 71 76  
Total assets 2,936 2,836  
On Balance Sheet Liabilities [Abstract]      
Derivative Liabilities 6 9  
Long-term debt 2,863 2,808  
Total liabilities 2,869 2,817  
Total assets of VIEs 28,433 29,186  
In Text Details [Abstract]      
Notional Amount Of Liquidity Exposure 1,500    
Consolidated VIEs [Member]
      
On Balance Sheet Assets [Abstract]      
Derivative assets 187 333  
Other Assets 4,728 4,654  
Total assets 130,183 134,431  
On Balance Sheet Liabilities [Abstract]      
Long-term debt 31,461 34,256  
Total liabilities 34,345 38,347  
Consolidated VIEs [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 2,325 2,201  
On Balance Sheet Assets [Abstract]      
Trading account assets 2,325 2,191  
Derivative assets 0 10  
Other Assets 0 0  
Total assets 2,325 2,201  
On Balance Sheet Liabilities [Abstract]      
Derivative Liabilities 0 0  
Long-term debt 2,861 2,806  
Total liabilities 2,861 2,806  
Consolidated, Total assets of VIEs 2,325 2,201  
Unconsolidated VIEs [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 1,302 1,376  
On Balance Sheet Assets [Abstract]      
Trading account assets 307 258  
Derivative assets 233 301  
Other Assets 71 76  
Total assets 611 635  
On Balance Sheet Liabilities [Abstract]      
Derivative Liabilities 6 9  
Long-term debt 2 2  
Total liabilities 8 11  
Unconsolidated, Total assets of VIEs 26,108 26,985  
Super Senior Collateralized Debt Obligation [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 140    
In Text Details [Abstract]      
Notional Amount Of Liquidity Exposure 98    
Non-Super Senior Collateralized Debt Obligation [Member] | Collateralized Debt Obligations [Member]
      
Variable Interest Entity [Line Items]      
Maximum loss exposure 1,200    
In Text Details [Abstract]      
Notional Amount Of Liquidity Exposure $ 1,400