Summary of the Bancorp's Nonperforming Loans and Leases by Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	$ 1,153	[1],[2]	$ 1,438	[1],[2]	$ 1,538	[1],[2]
OREO and other repossessed property	293	[3]	378	[3]	406	[3]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	806		1,058		1,155
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	378		487		562
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	144		170		168
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	192		251		239
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	83		138		168
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	9		12		18
Residential Mortgage Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	255		275		276
Consumer Portfolio Segment
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	92		105		107
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	51		54		58
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	2		2		2
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	39		48		46
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases			$ 1		$ 1

[1] Excludes $43, $138 and $197 of nonaccrual loans held for sale at September 30, 2012, December 31, 2011 and September 30, 2011, respectively.

[2] Includes $11, $17, and $19 of nonaccrual government insured commercial loans whose repayments are insured by the Small Business Administration at September 30, 2012, December 31, 2011 and September 30, 2011, respectively, and $1 and $2 of restructured nonaccrual government insured commercial loans at September 30, 2012 and December 31, 2011, respectively, and an immaterial amount at September 30, 2011.

[3] Excludes $73, $64 and $58 of OREO related to government insured loans at September 30, 2012, December 31, 2011 and September 30, 2011, respectively.