Investment Securities (Details 3) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Accretable balance of the structured investment securities and other investment securities
Balance at beginning of period	$ 126	$ 319	$ 139	$ 292
Accretion	(4)	(8)	(9)	(15)
Other	(5)	(9)	(13)	25
Balance at end of period	$ 117	$ 302	$ 117	$ 302