Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 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	$ 92,212		$ 92,212		$ 92,849
Balance of Loans 90 days or More Past Due	75		75		84
Net Charge-Offs	64	$ 87	153	$ 183
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	40,923		40,923		41,736
Balance of Loans 90 days or More Past Due	3		3		4
Net Charge-Offs	18	39	52	86
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	6,876		6,876		6,904
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	5	6	11	13
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	4,366		4,366		3,903
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	0	0	0
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	4,157		4,157		3,974
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	1	1	2	3
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	16,209		16,209		15,737
Balance of Loans 90 days or More Past Due	45		45		49
Net Charge-Offs	2	2	7	5
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	7,301		7,301		7,695
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	5	6	11	13
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	9,318		9,318		9,983
Balance of Loans 90 days or More Past Due	7		7		9
Net Charge-Offs	6	8	18	16
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	2,117		2,117		2,237
Balance of Loans 90 days or More Past Due	20		20		22
Net Charge-Offs	22	21	43	41
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	945		945		680
Balance of Loans 90 days or More Past Due	0		0		0
Net Charge-Offs	5	$ 4	9	$ 7
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	766		766		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	$ 91,446		$ 91,446		$ 92,098