Total Loans And Leases Managed By The Bancorp (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Total loans and leases owned by the Bancorp
Balance	$ 92,703		$ 92,703		$ 90,084
Commercial and Industrial Loans
Total loans and leases owned by the Bancorp
Balance	42,812		42,812		40,801
Balance of Loans 90 days or More Past Due	2		2
Net Credit Losses	34	$ 31	72	$ 127
Commercial Mortgage Loans
Total loans and leases owned by the Bancorp
Balance	7,165		7,165		7,410
Net Credit Losses	11	9	12	12
Commercial Construction
Total loans and leases owned by the Bancorp
Balance	2,709		2,709		2,071
Net Credit Losses		8		12
Commercial Leases
Total loans and leases owned by the Bancorp
Balance	3,882		3,882		3,721
Residential Mortgage
Total loans and leases owned by the Bancorp
Balance	13,792		13,792		13,582
Balance of Loans 90 days or More Past Due	43		43		56
Net Credit Losses	5	8	11	23
Home Equity
Total loans and leases owned by the Bancorp
Balance	8,591		8,591		8,886
Net Credit Losses	9	18	22	34
Automobile Loan Securitizations
Total loans and leases owned by the Bancorp
Balance	11,914		11,914		12,037
Balance of Loans 90 days or More Past Due	8		8		8
Net Credit Losses	4	5	12	13
Credit Card
Total loans and leases owned by the Bancorp
Balance	2,278		2,278		2,401
Balance of Loans 90 days or More Past Due	17		17		23
Net Credit Losses	21	21	42	39
Other Consumer Loans and Leases
Total loans and leases owned by the Bancorp
Balance	555		555		436
Net Credit Losses	2	1	6	10
Loans Held For Sale [Member]
Total loans and leases owned by the Bancorp
Balance	995		995		1,261
Loans and Leases Managed and Securitized
Total loans and leases owned by the Bancorp
Balance	93,698		93,698		91,345
Balance of Loans 90 days or More Past Due	70		70		$ 87
Net Credit Losses	$ 86	$ 101	$ 177	$ 270