Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 91,628		$ 92,098
Net Charge-Offs	89	$ 96
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	41,076		41,736
Balance of Loans 90 days or More Past Due	3		4
Net Charge-Offs	36	46
Commercial Mortgage Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	6,931		6,904
Balance of Loans 90 days or More Past Due	0		0
Net Charge-Offs	5	6
Commercial Construction Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	4,283		3,903
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	4,093		3,974
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	15,942		15,737
Balance of Loans 90 days or More Past Due	45		49
Net Charge-Offs	5	2
Home Equity
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	7,469		7,695
Balance of Loans 90 days or More Past Due	0		0
Net Charge-Offs	6	8
Automobile Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	9,572		9,983
Balance of Loans 90 days or More Past Due	6		9
Net Charge-Offs	11	9
Credit Card
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	2,070		2,237
Balance of Loans 90 days or More Past Due	21		22
Net Charge-Offs	22	20
Other Consumer Loans and Leases
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	808		680
Balance of Loans 90 days or More Past Due	0		0
Net Charge-Offs	3	$ 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	616		751
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	92,244		92,849
Balance of Loans 90 days or More Past Due	$ 75		$ 84