Total Loans And Leases Managed By The Bancorp (Detail) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	$ 79,216	$ 76,009
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	81,056	78,742
Balance of Loans 90 days or More Past Due	274	317
Net Credit Losses	933	1,972
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	29,324	26,502
Balance of Loans 90 days or More Past Due	9	29
Net Credit Losses	215	502
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	10,435	11,333
Balance of Loans 90 days or More Past Due	9	29
Net Credit Losses	148	445
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	1,239	2,500
Balance of Loans 90 days or More Past Due	44	5
Net Credit Losses	80	242
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	3,368	3,304
Balance of Loans 90 days or More Past Due	1	1
Net Credit Losses	(2)	5
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	11,878	9,989
Balance of Loans 90 days or More Past Due	91	111
Net Credit Losses	137	377
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	10,920	11,774
Balance of Loans 90 days or More Past Due	83	87
Net Credit Losses	168	199
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	11,593	10,738
Balance of Loans 90 days or More Past Due	9	13
Net Credit Losses	40	69
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	2,299	2,602
Balance of Loans 90 days or More Past Due	28	42
Net Credit Losses	147	133
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	$ 1,840	$ 2,733