Summary of the Bancorp's Nonperforming Loans and Leases by Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Loans held for sale	$ 641	[1]	$ 944	[1]
OREO and other repossessed property	176	[2]	229	[2]
Portfolio loans and leases	90,515	[3]	88,522	[4]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Portfolio loans and leases	53,892		52,046
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications [Line Items]
Portfolio loans and leases	3,974		4,507
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | Variable Interest Entity, Primary Beneficiary
Financing Receivable, Modifications [Line Items]
Restructured nonaccrual loans and leases	21		21
Government Insured
Financing Receivable, Modifications [Line Items]
OREO and other repossessed property	85		77
Nonperforming Financing Receivable
Financing Receivable, Modifications [Line Items]
Loans held for sale	7		6
Portfolio loans and leases	235		293
Nonperforming Financing Receivable | Government Insured | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Restructured nonaccrual loans and leases	3		2
Nonperforming Financing Receivable | Government Insured | Commercial Portfolio Segment | Small Business Administration
Financing Receivable, Modifications [Line Items]
Portfolio loans and leases	$ 9		$ 10

[1] Includes $579 and $890 of residential mortgage loans held for sale measured at fair value at September 30, 2014 and December 31, 2013, respectively.

[2] Excludes $85 and $77 of OREO related to government insured loans at September 30, 2014 and December 31, 2013, respectively.

[3] Excludes $109 of loans measured at fair value.

[4] Excludes $92 of loans measured at fair value.