Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 92,849	$ 93,485
Balance of Loans 90 days or More Past Due	84	75
Net Charge-Offs	362	446
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	41,736	42,151
Balance of Loans 90 days or More Past Due	4	7
Net Charge-Offs	172	229
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	6,904	6,991
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	15	27
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	3,903	3,214
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs		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	3,974	3,854
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	4	2
Residential Mortgage
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	15,737	14,424
Balance of Loans 90 days or More Past Due	49	40
Net Charge-Offs	10	17
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	7,695	8,336
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	27	39
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	9,983	11,497
Balance of Loans 90 days or More Past Due	9	10
Net Charge-Offs	35	28
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	2,237	2,360
Balance of Loans 90 days or More Past Due	22	18
Net Charge-Offs	80	82
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	680	658
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	20	19
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	751	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	$ 92,098	$ 92,582