Summary of the Bancorp's Nonperforming Loans and Leases by Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Loans held for sale	$ 944	[1]	$ 2,939	[1]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	306		329
Portfolio loans and leases	88,614		85,782
Variable Interest Entity, Primary Beneficiary
Financing Receivable, Modifications [Line Items]
Restructured nonaccrual loans and leases	21
Government Insured [Member]
Financing Receivable, Modifications [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	77		72
Nonperforming Financing Receivable
Financing Receivable, Modifications [Line Items]
Loans held for sale	6		29
Nonperforming Financing Receivable | Government Insured [Member] | Small Business Administration [Member]
Financing Receivable, Modifications [Line Items]
Portfolio loans and leases	10		10
Nonperforming Financing Receivable | Government Insured [Member] | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Restructured nonaccrual loans and leases	$ 2		$ 1

[1] Includes $890 and $2,856 of residential mortgage loans held for sale measured at fair value at December 31, 2013, and 2012, respectively.