Total Loans And Leases Managed By The Bancorp (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Total loans and leases owned by the Bancorp
Balance	$ 91,244		$ 90,084
Commercial and Industrial Loans
Total loans and leases owned by the Bancorp
Balance	42,062		40,801
Balance of Loans 90 days or More Past Due	2
Net Credit Losses	38	97
Commercial Mortgage Loans
Total loans and leases owned by the Bancorp
Balance	7,210		7,410
Balance of Loans 90 days or More Past Due	1
Net Credit Losses	1	3
Commercial Construction
Total loans and leases owned by the Bancorp
Balance	2,303		2,071
Net Credit Losses		5
Commercial Leases
Total loans and leases owned by the Bancorp
Balance	3,787		3,721
Residential Mortgage
Total loans and leases owned by the Bancorp
Balance	13,258		13,582
Balance of Loans 90 days or More Past Due	48		56
Net Credit Losses	6	15
Home Equity
Total loans and leases owned by the Bancorp
Balance	8,714		8,886
Net Credit Losses	14	16
Automobile Loan Securitizations
Total loans and leases owned by the Bancorp
Balance	11,873		12,037
Balance of Loans 90 days or More Past Due	7		8
Net Credit Losses	8	8
Credit Card
Total loans and leases owned by the Bancorp
Balance	2,291		2,401
Balance of Loans 90 days or More Past Due	20		23
Net Credit Losses	21	19
Other Consumer Loans and Leases
Total loans and leases owned by the Bancorp
Balance	470		436
Net Credit Losses	3	5
Loans Held For Sale [Member]
Total loans and leases owned by the Bancorp
Balance	724		1,261
Loans and Leases Managed and Securitized
Total loans and leases owned by the Bancorp
Balance	91,968		91,345
Balance of Loans 90 days or More Past Due	78		87
Net Credit Losses	$ 91	$ 168