Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Commercial Portfolio Segment | Commercial and Industrial Loans | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 414	$ 404
Recorded Investment	394	291
Allowance	184	128
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	49	49
Recorded Investment	38	37
Allowance	5	4
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	208	386
Recorded Investment	162	202
Allowance	30	40
Commercial Portfolio Segment | Commercial Construction | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	207	240
Recorded Investment	156	150
Allowance	19	31
Commercial Portfolio Segment | Commercial Leases | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	12	15
Recorded Investment	19	15
Allowance	8	7
Residential Mortgage Loans | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,101	1,126
Recorded Investment	1,053	1,071
Allowance	127	121
Consumer Portfolio Segment | Home Equity | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	392	400
Recorded Investment	389	397
Allowance	50	53
Consumer Portfolio Segment | Automobile Loans | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	36	33
Recorded Investment	36	32
Allowance	5	5
Consumer Portfolio Segment | Credit Card | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	105	100
Recorded Investment	96	100
Allowance	18	18
Consumer Portfolio Segment | Consumer Other Financing Receivable | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	5	78
Recorded Investment	5	78
Allowance	1	31
Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,529	2,831
Recorded Investment	2,348	2,373
Allowance	447	438
Commercial Portfolio Segment | Commercial and Industrial Loans | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	210	194
Recorded Investment	155	153
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	60	113
Recorded Investment	83	99
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	148	126
Recorded Investment	139	108
Commercial Portfolio Segment | Commercial Construction | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	70	24
Recorded Investment	34	8
Commercial Portfolio Segment | Commercial Leases | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	4	17
Recorded Investment	4	17
Residential Mortgage Loans | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	221	146
Recorded Investment	178	121
Consumer Portfolio Segment | Home Equity | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	62	48
Recorded Investment	59	46
Consumer Portfolio Segment | Automobile Loans | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	4	6
Recorded Investment	4	6
Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	779	674
Recorded Investment	$ 656	$ 558