Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 94,786,000,000		$ 94,786,000,000		$ 93,485,000,000
Balance of Loans 90 days or More Past Due	65,000,000		65,000,000		75,000,000
Net Charge-Offs	87,000,000	$ 86,000,000	183,000,000	$ 177,000,000
Commercial and Industrial Loans | Commercial Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	43,575,000,000		43,575,000,000		42,151,000,000
Balance of Loans 90 days or More Past Due	2,000,000		2,000,000		7,000,000
Net Charge-Offs	39,000,000	34,000,000	86,000,000	72,000,000
Commercial Mortgage Loans | Commercial Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	6,883,000,000		6,883,000,000		6,991,000,000
Net Charge-Offs	6,000,000	11,000,000	13,000,000	12,000,000
Commercial Construction Loans | Commercial Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	3,706,000,000		3,706,000,000		3,214,000,000
Net Charge-Offs			(1,000,000)
Commercial Leases | Commercial Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	3,978,000,000		3,978,000,000		3,854,000,000
Net Charge-Offs	1,000,000		3,000,000
Residential Mortgage | Residential Mortgage
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	15,159,000,000		15,159,000,000		14,424,000,000
Balance of Loans 90 days or More Past Due	38,000,000		38,000,000		40,000,000
Net Charge-Offs	2,000,000	5,000,000	5,000,000	11,000,000
Home Equity | Consumer Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	7,988,000,000		7,988,000,000		8,336,000,000
Net Charge-Offs	6,000,000	9,000,000	13,000,000	22,000,000
Automobile Loans | Consumer Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	10,671,000,000		10,671,000,000		11,497,000,000
Balance of Loans 90 days or More Past Due	7,000,000		7,000,000		10,000,000
Net Charge-Offs	8,000,000	4,000,000	16,000,000	12,000,000
Credit Card | Consumer Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	2,172,000,000		2,172,000,000		2,360,000,000
Balance of Loans 90 days or More Past Due	18,000,000		18,000,000		18,000,000
Net Charge-Offs	21,000,000	21,000,000	41,000,000	42,000,000
Other Consumer Loans and Leases | Consumer Portfolio Segment
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	654,000,000		654,000,000		658,000,000
Net Charge-Offs	4,000,000	$ 2,000,000	7,000,000	$ 6,000,000
Loans Held For Sale
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	877,000,000		877,000,000		903,000,000
Loans and Leases Managed and Securitized
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 93,909,000,000		$ 93,909,000,000		$ 92,582,000,000