Summary of Average Impaired Loans and Leases and Interest Income by Class (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
Interest Income Recognized	32		25	59		51
Commercial Portfolio Segment | Commercial and Industrial Loans
Average Recorded Investment	744		318	788		329
Interest Income Recognized	7		2	12		4
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Average Recorded Investment	146	[1]	136	154	[1]	138
Interest Income Recognized	1	[1]	1	2	[1]	2
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Average Recorded Investment	259		315	266		328
Interest Income Recognized	2		2	4		4
Commercial Portfolio Segment | Commercial Construction
Average Recorded Investment	100		114	107		112
Interest Income Recognized	1		1	1		2
Commercial Portfolio Segment | Commercial Leases
Average Recorded Investment	12		10	17		11
Residential Mortgage Loans
Average Recorded Investment	1,295		1,308	1,304		1,307
Interest Income Recognized	14		13	27		26
Consumer Portfolio Segment | Home Equity
Average Recorded Investment	395		434	401		437
Interest Income Recognized	6		5	11		11
Consumer Portfolio Segment | Automobile Loan
Average Recorded Investment	24		29	24		31
Consumer Portfolio Segment | Credit Card
Average Recorded Investment	55		68	56		71
Interest Income Recognized	1		1	2		2
Consumer Portfolio Segment | Consumer Other Financing Receivable
Average Recorded Investment			$ 2			$ 2

[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.