Summary of the Bancorp's Nonperforming Loans and Leases by Class (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011		Mar. 31, 2011
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	$ 1,352	[1]	$ 1,438	[1]	$ 1,645	[1]
OREO and other repossessed property	321	[2]	378	[2]	481	[2]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	988		1,058		1,211
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	442		487		572
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	180		170		271
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	225		251		182
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	131		138		168
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	10		12		18
Residential Mortgage Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	265		275		261
Consumer Portfolio Segment
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	99		105		173
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	50		54		56
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	3		2		3
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	45		48		54
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	$ 1		$ 1		$ 60

[1] Excludes $117, $138 and $216 of nonaccrual loans held for sale at March 31, 2012, December 31, 2011 and March 31, 2011, respectively.

[2] Excludes $69, $64 and $53 of OREO related to government insured loans at March 31, 2012, December 31, 2011 and March 31, 2011, respectively.