Summary of Average Impaired Loans and Leases and Interest Income by Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013
Average Recorded Investment	$ 3,030		$ 2,734	$ 3,117		$ 2,766
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Average Recorded Investment	146	[1]	136	154	[1]	138
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | Variable Interest Entity, Primary Beneficiary
Average Recorded Investment	$ 28		$ 30	$ 28		$ 30

[1] Excludes five restructured loans associated with a consolidated VIE in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party, with an average recorded investment of $28 and an immaterial amount of interest income recognized for the three and six months ended June 30, 2014.