Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010		Sep. 30, 2011 Commercial Portfolio Segment Pass	Dec. 31, 2010 Commercial Portfolio Segment Pass	Sep. 30, 2011 Commercial Portfolio Segment Pass Commercial And Industrial Loans [Member]	Dec. 31, 2010 Commercial Portfolio Segment Pass Commercial And Industrial Loans [Member]	Sep. 30, 2011 Commercial Portfolio Segment Pass Commercial Mortgage Loans Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Pass Commercial Mortgage Loans Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Pass Commercial Mortgage Loans Non Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Pass Commercial Mortgage Loans Non Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Pass Commercial Construction	Dec. 31, 2010 Commercial Portfolio Segment Pass Commercial Construction	Sep. 30, 2011 Commercial Portfolio Segment Pass Commercial Leases [Member]	Dec. 31, 2010 Commercial Portfolio Segment Pass Commercial Leases [Member]	Sep. 30, 2011 Commercial Portfolio Segment Special Mention	Sep. 30, 2010 Commercial Portfolio Segment Special Mention	Sep. 30, 2011 Commercial Portfolio Segment Special Mention Commercial And Industrial Loans [Member]	Sep. 30, 2010 Commercial Portfolio Segment Special Mention Commercial And Industrial Loans [Member]	Sep. 30, 2011 Commercial Portfolio Segment Special Mention Commercial Mortgage Loans Owner Occupied [Member]	Sep. 30, 2010 Commercial Portfolio Segment Special Mention Commercial Mortgage Loans Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Special Mention Commercial Mortgage Loans Non Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Special Mention Commercial Mortgage Loans Non Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Special Mention Commercial Construction	Dec. 31, 2010 Commercial Portfolio Segment Special Mention Commercial Construction	Sep. 30, 2011 Commercial Portfolio Segment Special Mention Commercial Leases [Member]	Dec. 31, 2010 Commercial Portfolio Segment Special Mention Commercial Leases [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Substandard	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Substandard	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Substandard Commercial And Industrial Loans [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Substandard Commercial And Industrial Loans [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Substandard Commercial Mortgage Loans Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Substandard Commercial Mortgage Loans Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Substandard Commercial Mortgage Loans Non Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Substandard Commercial Mortgage Loans Non Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Substandard Commercial Construction	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Substandard Commercial Construction	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Substandard Commercial Leases [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Substandard Commercial Leases [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Doubtful	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Doubtful	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Doubtful Commercial And Industrial Loans [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Doubtful Commercial And Industrial Loans [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Doubtful Commercial Mortgage Loans Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Doubtful Commercial Mortgage Loans Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Doubtful Commercial Mortgage Loans Non Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Doubtful Commercial Mortgage Loans Non Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Doubtful Commercial Construction	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Doubtful Commercial Construction	Sep. 30, 2011 Commercial Portfolio Segment Risk Level, Doubtful Commercial Leases [Member]	Dec. 31, 2010 Commercial Portfolio Segment Risk Level, Doubtful Commercial Leases [Member]	Sep. 30, 2011 Commercial Portfolio Segment		Dec. 31, 2010 Commercial Portfolio Segment		Sep. 30, 2011 Commercial Portfolio Segment Commercial And Industrial Loans [Member]	Dec. 31, 2010 Commercial Portfolio Segment Commercial And Industrial Loans [Member]	Sep. 30, 2011 Commercial Portfolio Segment Commercial Mortgage Loans Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Commercial Mortgage Loans Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Commercial Mortgage Loans Non Owner Occupied [Member]	Dec. 31, 2010 Commercial Portfolio Segment Commercial Mortgage Loans Non Owner Occupied [Member]	Sep. 30, 2011 Commercial Portfolio Segment Commercial Construction	Dec. 31, 2010 Commercial Portfolio Segment Commercial Construction	Sep. 30, 2011 Commercial Portfolio Segment Commercial Leases [Member]	Dec. 31, 2010 Commercial Portfolio Segment Commercial Leases [Member]	Dec. 31, 2010 Commercial And Industrial Loans [Member]	Dec. 31, 2010 Commercial Mortgage Loans Owner Occupied [Member]	Dec. 31, 2010 Commercial Mortgage Loans Non Owner Occupied [Member]	Dec. 31, 2010 Commercial Construction	Dec. 31, 2010 Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	$ 79,154	[1]	$ 77,445	[2],[3]	$ 36,599	$ 35,104	$ 25,510	$ 23,147	$ 4,080	$ 4,034	$ 3,293	$ 3,620	$ 418	$ 1,034	$ 3,298	$ 3,269	$ 3,010	$ 2,959	$ 1,598	$ 1,406	$ 562	$ 430	$ 550	$ 647	$ 258	$ 416	$ 42	$ 60	$ 4,359	$ 5,157	$ 2,023	$ 2,541	$ 785	$ 854	$ 1,013	$ 1,174	$ 511	$ 540	$ 27	$ 48	$ 201	$ 242	$ 127	$ 97	$ 19	$ 22	$ 28	$ 64	$ 26	$ 58	$ 1	$ 1	$ 44,169	[4]	$ 43,462	[3]	$ 29,258	$ 27,191	$ 5,446	$ 5,340	$ 4,884	$ 5,505	$ 1,213	$ 2,048	$ 3,368	$ 3,378	$ 27,191	$ 5,340	$ 5,505	$ 2,048	$ 3,378

[1] Excludes $62 of loans measured at fair value.

[2] Excludes $46 of loans measured at fair value.

[3] Excludes $46 of residential mortgage loans measured at fair value, and includes $1,039 of leveraged leases, net of unearned income.

[4] Excludes $62 of residential mortgage loans measured at fair value, and includes $1,018 of leveraged leases, net of unearned income.