Cash Flow Securitizations (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Sales proceeds from securitizations	$ 70,973	$ 81,435	$ 171,214	$ 163,757
Servicing fees	1,105	1,057	2,193	2,097
Other interests held	513	445	1,016	852
Purchases of delinquent assets	2	10	5	10
Net servicing advances	(11)	10	(20)	29
Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Sales proceeds from securitizations	0	0	0	0
Servicing fees	3	9	6	18
Other interests held	53	132	140	244
Purchases of delinquent assets	0	0	0	0
Net servicing advances	$ 0	$ 0	$ 0	$ 0