Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 91,970		$ 91,970
Net Charge-Offs	81	$ 89
Commercial and Industrial Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	41,678		41,170
Balance of Loans 90 days or More Past Due	7		3
Net Charge-Offs	28	36
Commercial Mortgage Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	6,515		6,610
Balance of Loans 90 days or More Past Due	1		0
Net Charge-Offs	1	5
Commercial Construction Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	4,766		4,553
Balance of Loans 90 days or More Past Due	0		0
Commercial Leases
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	3,919		4,068
Balance of Loans 90 days or More Past Due	0		0
Net Charge-Offs	0	1
Residential Mortgage
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	16,231		16,077
Balance of Loans 90 days or More Past Due	62		57
Net Charge-Offs	3	5
Home Equity
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	6,757		7,014
Balance of Loans 90 days or More Past Due	0		0
Net Charge-Offs	5	6
Automobile Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	9,018		9,112
Balance of Loans 90 days or More Past Due	9		10
Net Charge-Offs	11	11
Credit Card
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	2,188		2,299
Balance of Loans 90 days or More Past Due	28		27
Net Charge-Offs	25	22
Other Consumer Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	1,615		1,559
Balance of Loans 90 days or More Past Due	0		0
Net Charge-Offs	8	$ 3
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	717		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	92,687		92,462
Balance of Loans 90 days or More Past Due	$ 107		$ 97