Summary of Average Impaired Loans and Leases and Interest Income by Class (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Average Recorded Investment	$ 2,942		$ 2,969
Interest Income Recognized	113		96
Commercial Portfolio Segment | Commercial and Industrial Loans
Average Recorded Investment	517		448
Interest Income Recognized	16		4
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Average Recorded Investment	146	[1]	156	[1]
Interest Income Recognized	4	[1]	4	[1]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Average Recorded Investment	321		361
Interest Income Recognized	8		10
Commercial Portfolio Segment | Commercial Construction
Average Recorded Investment	108		160
Interest Income Recognized	4		2
Commercial Portfolio Segment | Commercial Leases
Average Recorded Investment	11		10
Residential Mortgage Loans
Average Recorded Investment	1,311		1,276
Interest Income Recognized	53		47
Consumer Portfolio Segment | Home Equity
Average Recorded Investment	429		439
Interest Income Recognized	23		24
Consumer Portfolio Segment | Automobile Loan
Average Recorded Investment	29		38
Interest Income Recognized	1		1
Consumer Portfolio Segment | Credit Card
Average Recorded Investment	68		80
Interest Income Recognized	4		4
Consumer Portfolio Segment | Consumer Other Financing Receivable
Average Recorded Investment	$ 2		$ 1

[1] Excludes five restructured nonaccrual loans at December 31, 2013 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 unpaid principal balance of $28, an average recorded investment of $29, and an allowance of $11.