Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 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	$ 94,211		$ 94,211		$ 93,485
Balance of Loans 90 days or More Past Due	76		76		75
Net Charge-Offs	107	$ 188	289	$ 366
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	42,829		42,829		42,151
Balance of Loans 90 days or More Past Due	7		7		7
Net Charge-Offs	61	128	147	200
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	6,860		6,860		6,991
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	2	11	14	24
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	3,905		3,905		3,214
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	0	3		3
Net Recoveries			(1)
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	3,995		3,995		3,854
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	0	0	3	0
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	15,597		15,597		14,424
Balance of Loans 90 days or More Past Due	43		43		40
Net Charge-Offs	2	3	7	14
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	7,864		7,864		8,336
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	7	9	20	31
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	10,349		10,349		11,497
Balance of Loans 90 days or More Past Due	8		8		10
Net Charge-Offs	9	7	26	19
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	2,169		2,169		2,360
Balance of Loans 90 days or More Past Due	18		18		18
Net Charge-Offs	20	21	61	63
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	643		643		658
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	6	$ 6	12	$ 12
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	1,060		1,060		903
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	$ 93,151		$ 93,151		$ 92,582