Summary of Average Impaired Loans and Leases and Interest Income by Class (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Average Recorded Investment	$ 3,202		$ 2,793
Interest Income Recognized	27		26
Commercial Portfolio Segment | Commercial and Industrial Loans
Average Recorded Investment	832		339
Interest Income Recognized	5		2
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Average Recorded Investment	162	[1]	140	[1]
Interest Income Recognized	1	[1]	1	[1]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Average Recorded Investment	273		341
Interest Income Recognized	2		2
Commercial Portfolio Segment | Commercial Construction
Average Recorded Investment	114		110
Interest Income Recognized			1
Commercial Portfolio Segment | Commercial Leases
Average Recorded Investment	22		11
Residential Mortgage Loans
Average Recorded Investment	1,312		1,306
Interest Income Recognized	13		13
Consumer Portfolio Segment | Home Equity
Average Recorded Investment	406		439
Interest Income Recognized	5		6
Consumer Portfolio Segment | Automobile Loan
Average Recorded Investment	24		32
Consumer Portfolio Segment | Credit Card
Average Recorded Investment	57		73
Interest Income Recognized	1		1
Consumer Portfolio Segment | Consumer Other Financing Receivable
Average Recorded Investment			$ 2

[1] Excludes five restructured loans associated with a consolidated variable interest entity 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 $30 at March 31, 2014 and 2013, respectively.