Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 95,872	$ 92,462
Balance of Loans 90 days or More Past Due	93	97
Net Charge-Offs	330	298
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	44,407	41,170
Balance of Loans 90 days or More Past Due	4	3
Net Charge-Offs	132	111
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	6,977	6,610
Balance of Loans 90 days or More Past Due	2	0
Net Charge-Offs	(1)	12
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	4,657	4,553
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs		0
Net Recoveries	0
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	3,600	4,068
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	1	2
Residential Mortgage
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	16,041	16,077
Balance of Loans 90 days or More Past Due	38	57
Net Charge-Offs	7	7
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	6,402	7,014
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	12	19
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	8,976	9,112
Balance of Loans 90 days or More Past Due	12	10
Net Charge-Offs	40	37
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	2,470	2,299
Balance of Loans 90 days or More Past Due	37	27
Net Charge-Offs	101	84
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	2,342	1,559
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	38	26
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	607	492
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	$ 95,265	$ 91,970