Summary of the Bancorp's Nonperforming Loans and Leases by Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Financing Receivable, Modifications [Line Items]
Loans held for sale	$ 1,863		$ 2,954		$ 1,185
OREO and other repossessed property	277	[1]	378	[1]	449	[1]
Government Insured [Member]
Financing Receivable, Modifications [Line Items]
OREO and other repossessed property	70		64		54
Non Accrual Loans [Member]
Financing Receivable, Modifications [Line Items]
Loans held for sale	$ 60		$ 138		$ 176

[1] Excludes $70, $64 and $54 of OREO related to government insured loans at June 30, 2012, December 31, 2011 and June 30, 2011, respectively. Includes $13, $17, and $20 of nonaccrual government insured commercial loans whose repayments are insured by the Small Business Administration at June 30, 2012, December 31, 2012, and June 30, 2011, respectively, and $1 and $2 of restructured nonaccrual government insured commercial loans at June 30, 2012 and December 31, 2011, respectively, and an immaterial amount at June 30, 2011.