Total Loans And Leases Managed By The Bancorp (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	$ 82,113	$ 77,465
Credit Card Loan [Member]
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	1,896	1,821
Balance of Loans 90 days or More Past Due	29	36
Net Credit Losses	20	31
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	1,584	1,291
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	83,697	78,756
Balance of Loans 90 days or More Past Due	216	266
Net Credit Losses	220	367
Loans and Leases Managed and Securitized | Commercial And Industrial Loans [Member]
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	32,203	27,431
Balance of Loans 90 days or More Past Due	2	8
Net Credit Losses	54	83
Loans and Leases Managed and Securitized | Commercial Mortgage Loans [Member]
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	9,976	10,617
Balance of Loans 90 days or More Past Due	30	8
Net Credit Losses	30	54
Loans and Leases Managed and Securitized | Commercial Construction
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	916	2,020
Balance of Loans 90 days or More Past Due		23
Net Credit Losses	18	26
Loans and Leases Managed and Securitized | Commercial Leases [Member]
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	3,512	3,367
Net Credit Losses		1
Loans and Leases Managed and Securitized | 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	12,523	10,556
Balance of Loans 90 days or More Past Due	73	98
Net Credit Losses	37	65
Loans and Leases Managed and Securitized | 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	10,493	11,222
Balance of Loans 90 days or More Past Due	74	84
Net Credit Losses	46	63
Loans and Leases Managed and Securitized | Automobile Loan
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	11,832	11,129
Balance of Loans 90 days or More Past Due	8	9
Net Credit Losses	9	20
Loans and Leases Managed and Securitized | 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	346	593
Net Credit Losses	$ 6	$ 24