Total Loans And Leases Managed By The Bancorp (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	$ 93,574		$ 93,574		$ 90,084
Commercial and Industrial Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	42,970		42,970		40,801
Balance of Loans 90 days or More Past Due	3		3
Net Credit Losses	128	$ 50	200	$ 177
Commercial Mortgage Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	7,084		7,084		7,410
Balance of Loans 90 days or More Past Due	2		2
Net Credit Losses	11	5	24	16
Commercial Construction Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	3,101		3,101		2,071
Net Credit Losses	3		3	12
Commercial Leases
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	3,901		3,901		3,721
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	14,197		14,197		13,582
Balance of Loans 90 days or More Past Due	40		40		56
Net Credit Losses	3	9	14	31
Home Equity
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	8,460		8,460		8,886
Net Credit Losses	9	14	31	49
Automobile Loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	11,829		11,829		12,037
Balance of Loans 90 days or More Past Due	8		8		8
Net Credit Losses	7	7	19	20
Credit Card
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	2,330		2,330		2,401
Balance of Loans 90 days or More Past Due	17		17		23
Net Credit Losses	21	23	63	62
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 [Line Items]
Balance	696		696		436
Net Credit Losses	6	7	12	17
Loans Held For Sale [Member]
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	994		994		1,261
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	94,568		94,568		91,345
Balance of Loans 90 days or More Past Due	70		70		$ 87
Net Credit Losses	$ 188	$ 115	$ 366	$ 384