Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Real Estate and Other VIEs (Details)

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Securitizations and Other Variable Interest Entities - Real Estate and Other VIEs (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Consolidated VIE
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Consolidated VIE
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Unconsolidated VIEs
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Unconsolidated VIEs
Sep. 30, 2012
Resecuritization Trusts [Member]
Sep. 30, 2011
Resecuritization Trusts [Member]
Sep. 30, 2012
Resecuritization Trusts [Member]
Sep. 30, 2011
Resecuritization Trusts [Member]
Sep. 30, 2012
Other Asset Back Financing Arrangement [Member]
Dec. 31, 2011
Other Asset Back Financing Arrangement [Member]
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Consolidated VIE
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Consolidated VIE
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Unconsolidated VIEs
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Unconsolidated VIEs
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Consolidated VIE
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Consolidated VIE
Sep. 30, 2012
Real Estate and Other Variable Risk Entities [Member]
Unconsolidated VIEs
Dec. 31, 2011
Real Estate and Other Variable Risk Entities [Member]
Unconsolidated VIEs
Summary of Information Related to Real Estate and Other VIEs [Abstract]                                                    
Maximum loss exposure     $ 3,681,000,000 $ 6,452,000,000 $ 639,000,000 $ 1,821,000,000 $ 3,042,000,000 $ 4,631,000,000         $ 3,400,000,000 $ 4,700,000,000                        
Trading assets                                         3,213,000,000 2,980,000,000 1,401,000,000 0 1,812,000,000 2,980,000,000
Derivative contracts 26,621,000,000 35,013,000,000                                     432,000,000 440,000,000 0 0 432,000,000 440,000,000
Investment securities 6,389,000,000 6,684,000,000                                     84,000,000 224,000,000 41,000,000 162,000,000 43,000,000 62,000,000
Loans, notes and mortgages                                         489,000,000 898,000,000 21,000,000 94,000,000 468,000,000 804,000,000
Other assets 14,909,000,000 15,155,000,000                                     315,000,000 1,919,000,000 27,000,000 1,575,000,000 288,000,000 344,000,000
Total Assets 595,379,000,000 556,463,000,000                                     4,533,000,000 6,461,000,000 1,490,000,000 1,831,000,000 3,043,000,000 4,630,000,000
Long-term borrowings 93,548,000,000 [1] 106,929,000,000 [1]                         852,000,000 10,000,000 852,000,000 10,000,000 0 0            
Other liabilities 18,553,000,000 18,099,000,000                         173,000,000 450,000,000 171,000,000 185,000,000 2,000,000 265,000,000            
Total Liabilities 546,226,000,000 506,495,000,000                         1,025,000,000 460,000,000 1,023,000,000 195,000,000 2,000,000 265,000,000            
Total assets of VIEs, consolidated                                             1,490,000,000 1,831,000,000    
Total assets of VIEs, unconsolidated                                                 21,493,000,000 26,731,000,000
Total assets of VIEs                                         22,983,000,000 28,562,000,000        
Transfers of Financial Assets Accounted For as Sale Initial Fair Value of Assets Obtained as Proceeds, in Period                 $ 12,200,000,000 $ 600,000,000 $ 36,500,000,000 $ 8,100,000,000                            
Financing Provided For Asset Backed Financing Arrangements Percentage                         75.00%                          
[1] Excludes junior subordinated notes (related to trust preferred securities).