Divestiture and Discontinued Operations [Details 4] (Education Lending [Member], USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Trust Student Loans [Member]
Change in the fair values of the Level 3 consolidated education loan securitization trusts
Balance at January 1, 2011	$ 3,125
Gains (losses) recognized in earnings	159	[1]
Purchases	0
Sales	0
Issuances	0
Settlements	(184)
Balance at June 30, 2011	3,100
Other Assets [Member]
Change in the fair values of the Level 3 consolidated education loan securitization trusts
Balance at January 1, 2011	45
Gains (losses) recognized in earnings	0
Purchases	0
Sales	0
Issuances	0
Settlements	(11)
Balance at June 30, 2011	34
Trust Securities [Member]
Change in the fair values of the Level 3 consolidated education loan securitization trusts
Balance at January 1, 2011	2,966
Gains (losses) recognized in earnings	181
Purchases	0
Sales	0
Issuances	0
Settlements	(228)
Balance at June 30, 2011	2,919
Other Liabilities [Member]
Change in the fair values of the Level 3 consolidated education loan securitization trusts
Balance at January 1, 2011	31
Gains (losses) recognized in earnings	0
Purchases	0
Sales	0
Issuances	0
Settlements	(1)
Balance at June 30, 2011	$ 30

[1] Includes results of discontinued operations described in Note 13.