Divestiture and Discontinued Operations [Details 3] (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
ASSETS MEASURED ON A RECURRING BASIS
Other assets	$ 28	$ 77
Total assets on a recurring basis at fair value	21,578	25,322
LIABILITIES MEASURED ON A RECURRING BASIS
Other liabilities	36	66
Total liabilities on a recurring basis at fair value	1,846	2,175
Education Lending [Member] | Level 1 [Member]
ASSETS MEASURED ON A RECURRING BASIS
Loans	0
Other assets	0
Total assets on a recurring basis at fair value	0
LIABILITIES MEASURED ON A RECURRING BASIS
Securities	0
Other liabilities	0
Total liabilities on a recurring basis at fair value	0
Education Lending [Member] | Level 2 [Member]
ASSETS MEASURED ON A RECURRING BASIS
Loans	0
Other assets	0
Total assets on a recurring basis at fair value	0
LIABILITIES MEASURED ON A RECURRING BASIS
Securities	0
Other liabilities	0
Total liabilities on a recurring basis at fair value	0
Education Lending [Member] | Level 3 [Member]
ASSETS MEASURED ON A RECURRING BASIS
Loans	3,100
Other assets	34
Total assets on a recurring basis at fair value	3,134
LIABILITIES MEASURED ON A RECURRING BASIS
Securities	2,919
Other liabilities	30
Total liabilities on a recurring basis at fair value	2,949
Education Lending [Member]
ASSETS MEASURED ON A RECURRING BASIS
Loans	3,100
Other assets	34
Total assets on a recurring basis at fair value	3,134
LIABILITIES MEASURED ON A RECURRING BASIS
Securities	2,919
Other liabilities	30
Total liabilities on a recurring basis at fair value	$ 2,949