v2.3.0.11
Variable Interest Entities And Securitization Activities (Information Regarding SPEs) (Details) (USD $)
In Millions
Jun. 30, 2011
Dec. 31, 2010
Interests purchased in the secondary market (fair value) $ 4,643 $ 4,735
Special Purpose Entities [Member] | U.S. Agency Collateralized Mortgage Obligations [Member]
   
SPE assets (unpaid principal balance) 33,188 [1] 29,748 [1]
Retained interests (fair value) 1,710 2,636
Interests purchased in the secondary market (fair value) 133 155
Special Purpose Entities [Member] | U.S. Agency Collateralized Mortgage Obligations [Member] | Investment Grade [Member]
   
Retained interests (fair value) 1,710 2,636
Interests purchased in the secondary market (fair value) 133 155
Special Purpose Entities [Member] | Credit-Linked Notes And Other [Member]
   
SPE assets (unpaid principal balance) 17,913 [1] 11,462 [1]
Retained interests (fair value) 1,477 2,335
Interests purchased in the secondary market (fair value) 449 32
Derivative assets (fair value) 166 78
Derivative liabilities (fair value) 274 314
Special Purpose Entities [Member] | Credit-Linked Notes And Other [Member] | Investment Grade [Member]
   
Retained interests (fair value) 3 8
Interests purchased in the secondary market (fair value) 425 21
Special Purpose Entities [Member] | Credit-Linked Notes And Other [Member] | Non-Investment Grade [Member]
   
Retained interests (fair value) 1,474 2,327
Interests purchased in the secondary market (fair value) 24 11
Special Purpose Entities [Member] | Investment Grade [Member] | Residential Mortgage Loans [Member]
   
Retained interests (fair value) 37 46
Interests purchased in the secondary market (fair value) 75 118
Special Purpose Entities [Member] | Investment Grade [Member] | Commercial Mortgage Loans [Member]
   
Retained interests (fair value) 89 64
Interests purchased in the secondary market (fair value) 286 643
Special Purpose Entities [Member] | Non-Investment Grade [Member] | Residential Mortgage Loans [Member]
   
Retained interests (fair value) 233 206
Interests purchased in the secondary market (fair value) 266 205
Special Purpose Entities [Member] | Non-Investment Grade [Member] | Commercial Mortgage Loans [Member]
   
Retained interests (fair value) 59 81
Interests purchased in the secondary market (fair value) 144 55
Special Purpose Entities [Member] | Residential Mortgage Loans [Member]
   
SPE assets (unpaid principal balance) 44,788 [1] 48,947 [1]
Retained interests (fair value) 270 252
Interests purchased in the secondary market (fair value) 341 323
Derivative assets (fair value) 40 75
Derivative liabilities (fair value) 38 29
Special Purpose Entities [Member] | Commercial Mortgage Loans [Member]
   
SPE assets (unpaid principal balance) 86,427 [1] 85,974 [1]
Retained interests (fair value) 148 145
Interests purchased in the secondary market (fair value) 430 698
Derivative assets (fair value) 1,123 955
Derivative liabilities (fair value)   $ 80
[1] Amounts include assets transferred by unrelated transferors.