Summarizes the Total Nonperforming and Delinquent Loans and Leases (Detail) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010		Sep. 30, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases	$ 1,134		$ 1,333		$ 1,378
Restructured nonaccrual loans and leases	404		347		206
Total nonperforming loans and leases	1,538	[1]	1,680	[1]	1,584
OREO and other repossessed property	406	[2]	494	[2]	498	[2]
Total nonperforming assets	1,944	[3]	2,174	[3]	2,082	[3]
Total loans and leases 90 days past due and still accruing	$ 274	[4]	$ 274	[5]	$ 317

[1] Excludes $197 and $294 of nonaccrual loans held for sale at September 30, 2011 and December 31, 2010, respectively

[2] Excludes $58, $38 and $35 of OREO related to government insured loans at September 30, 2011, December 31, 2010 and September 30, 2010, respectively.

[3] Excludes $197, $294 and $699 of nonaccrual loans held for sale at September 30, 2011, December 31, 2010 and September 30, 2010, respectively.

[4] Excludes $62 of loans measured at fair value.

[5] Excludes $46 of loans measured at fair value.