v2.4.0.6
Securitizations and Variable Interest Entities, Cash Flow Securitizations (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Mortgage loans [Member]
     
Cash Flow Securitizations [Abstract]      
Sales proceeds from securitizations $ 535,372 $ 337,357 $ 374,488
Servicing fees 4,433 4,401 4,316
Other interests held 1,767 1,779 1,786
Purchases of delinquent assets 62 9 25
Net servicing advances 226 29 49
Other financial assets [Member]
     
Cash Flow Securitizations [Abstract]      
Sales proceeds from securitizations 0 0 0
Servicing fees 10 11 34
Other interests held 135 263 442
Purchases of delinquent assets 0 0 0
Net servicing advances $ 0 $ 0 $ 0