Composition of the Company's Loan Portfolio (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]
Loans Held for Sale	2,052	[2]	3,501	[2]
Loans Held-for-Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	114,913		115,975
Loans Held-for-Investment | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	53,369		53,488
Loans Held-for-Investment | Commercial Portfolio Segment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	45,922	[3]	44,753	[3]
Loans Held-for-Investment | Commercial Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	5,707		6,167
Loans Held-for-Investment | Commercial Portfolio Segment | Commercial Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,740		2,568
Loans Held-for-Investment | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	45,024		46,521
Loans Held-for-Investment | Residential Mortgage Loans | Residential Guaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	4,513		4,520
Loans Held-for-Investment | Residential Mortgage Loans | Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	23,224	[4]	23,959	[4]
Loans Held-for-Investment | Residential Mortgage Loans | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	16,169		16,751
Loans Held-for-Investment | Residential Mortgage Loans | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,118		1,291
Loans Held-for-Investment | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	16,520		15,966
Loans Held-for-Investment | Consumer Portfolio Segment | Guaranteed Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	4,620		4,260
Loans Held-for-Investment | Consumer Portfolio Segment | Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,863		1,722
Loans Held-for-Investment | Consumer Portfolio Segment | Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	9,630		9,499
Loans Held-for-Investment | Consumer Portfolio Segment | Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	407		485
Loans Held-for-Sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Held for Sale	2,052		3,501
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	53,369		53,488
Commercial Portfolio Segment | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	45,922	[5]	44,753	[5]
Commercial Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	5,707		6,167
Commercial Portfolio Segment | Commercial Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,740		2,568
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	45,024		46,521
Residential Mortgage Loans | Residential Guaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	4,513		4,520
Residential Mortgage Loans | Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	23,224	[6]	23,959	[7]
Residential Mortgage Loans | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	16,169		16,751
Residential Mortgage Loans | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,118		1,291
Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	16,520		15,966
Consumer Portfolio Segment | Guaranteed Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	4,620		4,260
Consumer Portfolio Segment | Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,863		1,722
Consumer Portfolio Segment | Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	9,630		9,499
Consumer Portfolio Segment | Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	407		485
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	45,922		44,753
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	5,707		6,167
Commercial Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,740		2,568
Residential Nonguaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	23,224	[8]	23,959	[8]
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	16,169		16,751
Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,118		1,291
Consumer Other Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	1,438	[9]	1,309	[9]
Consumer Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	9,630		9,499
Consumer Credit Card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	$ 407		$ 485

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

[2] Includes loans held for sale, at fair value, of consolidated VIEs $329 $316

[3] Includes $4 million of loans carried at fair value at June 30, 2011 and December 31, 2010, respectively.

[4] Includes $445 million and $488 million of loans carried at fair value at June 30, 2011 and December 31, 2010, respectively.

[5] Includes $4 million in loans carried at fair value.

[6] Includes $445 million in loans carried at fair value.

[7] Includes $488 million in loans carried at fair value.

[8] 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.

[9] 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.