Summary of the Bancorp's Nonperforming Loans and Leases by Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Modifications
Loans held for sale	$ 1,330	[1]	$ 2,939	[1]
OREO and other repossessed property	244	[2]	257	[2]
Portfolio loans and leases	87,142	[3]	85,706	[4],[5]
Commercial Portfolio Segment
Financing Receivable, Modifications
Portfolio loans and leases	50,752	[6]	49,388	[7]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Portfolio loans and leases	4,572		4,876
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | Variable Interest Entity, Primary Beneficiary
Financing Receivable, Modifications
Restructured nonaccrual loans and leases	22
Government Insured
Financing Receivable, Modifications
OREO and other repossessed property	75		72
Nonperforming Financing Receivable
Financing Receivable, Modifications
Loans held for sale	11		29
Portfolio loans and leases	249		332
Nonperforming Financing Receivable | Government Insured | Commercial Portfolio Segment
Financing Receivable, Modifications
Restructured nonaccrual loans and leases	2		1
Nonperforming Financing Receivable | Government Insured | Commercial Portfolio Segment | Small Business Administration
Financing Receivable, Modifications
Portfolio loans and leases	$ 11		$ 10

[1] Includes $1,298 and $2,856 of residential mortgage loans held for sale measured at fair value at September 30, 2013 and December 31, 2012, respectively.

[2] Excludes $75 and $72 of OREO related to government insured loans at September 30, 2013 and December 31, 2012, respectively.

[3] Excludes $89 of loans measured at fair value.

[4] Excludes $76 of loans measured at fair value.

[5] Includes an immaterial amount of government insured commercial loans 30-89 and 90 days past due and accruing whose repayments are insured by the SBA at December 31, 2012.

[6] Excludes $89 of residential mortgage loans measured at fair value, and includes $875 of leveraged leases, net of unearned income.

[7] Excludes $76 of residential mortgage loans measured at fair value, and includes $862 of leveraged leases, net of unearned income.