Loans & Leases (Total Loans And Leases Managed By The Bancorp) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018	Dec. 31, 2018
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	$ 110,534			$ 95,872
Net Charge-Offs	77		$ 81
90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	132	[1]		93
Post Earnings Adjustment	4
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 [Line Items]
Balance	51,925			44,407
Net Charge-Offs	18		28
Commercial and Industrial Loans | Commercial Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	15			4
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 [Line Items]
Balance	10,689			6,977
Net Charge-Offs	(1)		1
Commercial mortgage loans | Commercial Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	20			2
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 [Line Items]
Balance	5,231			4,657
Commercial construction loans | Commercial Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	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 [Line Items]
Balance	3,909			3,600
Commercial leases | Commercial Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	0			0
Residential Mortgage | Residential Mortgage
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	17,437			16,041
Net Charge-Offs	1		3
Residential Mortgage | Residential Mortgage | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	48			38
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 [Line Items]
Balance	6,435			6,402
Net Charge-Offs	3		5
Home Equity | Consumer Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	1			0
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 [Line Items]
Balance	10,031			8,976
Net Charge-Offs	13		11
Indirect secured consumer loans | Consumer Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	9			12
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 [Line Items]
Balance	2,388			2,470
Net Charge-Offs	33		25
Credit Card | Consumer Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	38			37
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 [Line Items]
Balance	2,489			2,342
Net Charge-Offs	10		$ 8
Other Consumer Loans | Consumer Portfolio Segment | 90 Days and Greater Past Due
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance of Loans 90 days or More Past Due	1			0
Loans Held For Sale
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	692			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 [Line Items]
Balance	$ 109,842			$ 95,265

[1] Total portfolio loans and leases 90 days past due and st ill accruing reflect a decrease of $ 4 million which occurred after the Bancorp’s Form 8 -K was filed on April 23, 2019.