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, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Average Recorded Investment	$ 2,734		$ 3,012	$ 2,766		$ 3,005
Interest Income Recognized	25		32	51		56
Commercial Portfolio Segment | Commercial and Industrial Loans
Average Recorded Investment	318		467	329		481
Interest Income Recognized	2		1	4		2
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Average Recorded Investment	136	[1]	164	138	[1]	152
Interest Income Recognized	1	[1]	1	2	[1]	2
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Average Recorded Investment	315		361	328		341
Interest Income Recognized	2		2	4		4
Commercial Portfolio Segment | Commercial Construction
Average Recorded Investment	114		177	112		190
Interest Income Recognized	1		1	2		2
Commercial Portfolio Segment | Commercial Leases
Average Recorded Investment	10		10	11		11
Residential Mortgage Loans
Average Recorded Investment	1,308		1,270	1,307		1,266
Interest Income Recognized	13		13	26		25
Consumer Portfolio Segment | Home Equity
Average Recorded Investment	434		438	437		441
Interest Income Recognized	5		12	11		18
Consumer Portfolio Segment | Automobile Loan
Average Recorded Investment	29		39	31		40
Interest Income Recognized			1			1
Consumer Portfolio Segment | Credit Card
Average Recorded Investment	68		86	71		83
Interest Income Recognized	1		1	2		2
Consumer Portfolio Segment | Consumer Other Financing Receivable
Average Recorded Investment	$ 2			$ 2

[1] Excludes five restructured nonaccrual 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 $30 and an immaterial amount of interest income recognized for the three and six months ended June 30, 2013.