Total Loans And Leases Managed By The Bancorp (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Balance	$ 83,059	$ 79,216
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	33,357	29,324
Balance of Loans 90 days or More Past Due	1	9
Net Credit Losses	129	215
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	9,368	10,435
Balance of Loans 90 days or More Past Due	22	9
Net Credit Losses	83	148
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	683	1,239
Balance of Loans 90 days or More Past Due		44
Net Credit Losses	22	80
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	3,549	3,368
Balance of Loans 90 days or More Past Due		1
Net Credit Losses	8	(2)
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	13,449	11,878
Balance of Loans 90 days or More Past Due	76	91
Net Credit Losses	99	137
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	10,238	10,920
Balance of Loans 90 days or More Past Due	65	83
Net Credit Losses	122	168
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	11,912	11,593
Balance of Loans 90 days or More Past Due	9	9
Net Credit Losses	23	40
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	311	421
Net Credit Losses	15	71
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	1,994	1,878
Balance of Loans 90 days or More Past Due	28	28
Net Credit Losses	56	76
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	1,802	1,840
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	84,861	81,056
Balance of Loans 90 days or More Past Due	201	274
Net Credit Losses	$ 557	$ 933