LHFI by Credit Quality Indicator (Parenthetical) (Detail) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	$ 114,913	[1]	$ 115,975	[1]
Federally Guaranteed Residential Loans | Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	4,500		4,500
Guaranteed Student Loans | Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	425		413
Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	23,224	[2]	23,959	[2]
Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	$ 1,438	[3]	$ 1,309	[3]

[1] Includes loans of consolidated VIEs 2,896 2,869

[2] Excludes $4.5 billion at both June 30, 2011 and December 31, 2010 of federally guaranteed residential loans. At both June 30, 2011 and December 31, 2010, the vast majority of these loans had FICO scores of 700 and above.

[3] Excludes $425 million and $413 million as of June 30, 2011 and December 31, 2010, respectively, of private-label student loans with third party insurance. At both June 30, 2011 and December 31, 2010, the vast majority of these loans had FICO scores of 700 and above.