Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	$ 110,958	$ 95,872
Balance of Loans 90 days or More Past Due	130	93
Net Charge-Offs	369	330
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	50,677	44,407
Balance of Loans 90 days or More Past Due	11	4
Net Charge-Offs	103	132
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	10,964	6,977
Balance of Loans 90 days or More Past Due	15	2
Net Charge-Offs	(2)	(1)
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	5,090	4,657
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	0	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	3,363	3,600
Balance of Loans 90 days or More Past Due	0	0
Net Charge-Offs	7	1
Residential mortgage loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Balance	17,988	16,041
Balance of Loans 90 days or More Past Due	50	38
Net Charge-Offs	4	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	6,083	6,402
Balance of Loans 90 days or More Past Due	1	0
Net Charge-Offs	18	12
Indirect secured consumer 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	11,538	8,976
Balance of Loans 90 days or More Past Due	10	12
Net Charge-Offs	50	40
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	2,532	2,470
Balance of Loans 90 days or More Past Due	42	37
Net Charge-Offs	134	101
Other Consumer 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	2,723	2,342
Balance of Loans 90 days or More Past Due	1	0
Net Charge-Offs	55	38
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	1,400	607
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	$ 109,558	$ 95,265