Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Financing Receivable, Impaired
Unpaid Principal Balance	$ 3,092		$ 3,168
Recorded Investment	2,759	[1]	2,823	[2]
Allowance	271		295
Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	988		1,006
Recorded Investment	842		856
Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	2,104		2,162
Recorded Investment	1,917		1,967
Allowance	271		295
Residential Mortgage Loans | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	355		326
Recorded Investment	303		275
Residential Mortgage Loans | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	1,047		1,067
Recorded Investment	1,009		1,023
Allowance	132		137
Commercial and Industrial Loans | Commercial Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	189		207
Recorded Investment	147		169
Commercial and Industrial Loans | Commercial Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	223		263
Recorded Investment	168		194
Allowance	54		65
Commercial Mortgage Loans, Owner Occupied | Commercial Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	95		107
Recorded Investment	87		99
Commercial Mortgage Loans, Owner Occupied | Commercial Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	62	[3]	54
Recorded Investment	52	[3]	43
Allowance	6	[3]	5
Commercial Mortgage Loans, Non Owner Occupied | Commercial Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	198		209
Recorded Investment	185		199
Commercial Mortgage Loans, Non Owner Occupied | Commercial Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	191		215
Recorded Investment	137		160
Allowance	14		16
Commercial Construction | Commercial Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	99		109
Recorded Investment	71		67
Commercial Construction | Commercial Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	70		48
Recorded Investment	44		37
Allowance	1		5
Commercial Leases | Commercial Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	9		5
Recorded Investment	9		5
Commercial Leases | Commercial Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	2		8
Recorded Investment	2		8
Allowance			5
Home Equity | Consumer Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	40		40
Recorded Investment	37		39
Home Equity | Consumer Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	407		400
Recorded Investment	404		396
Allowance	49		46
Automobile Loans | Consumer Portfolio Segment | Impaired Financing Receivables with No Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	3		3
Recorded Investment	3		3
Automobile Loans | Consumer Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	28		31
Recorded Investment	28		30
Allowance	4		4
Credit Card | Consumer Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	72		74
Recorded Investment	71		74
Allowance	11		12
Consumer Other Financing Receivable | Consumer Portfolio Segment | Impaired Financing Receivables with Related Allowance
Financing Receivable, Impaired
Unpaid Principal Balance	2		2
Recorded Investment	$ 2		$ 2

[1] Includes $441, $1,201 and $482, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $159, $111 and $63, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.

[2] Includes $431, $1,175 and $480, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $177, $123 and $64, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.

[3] Excludes five restructured nonaccrual loans at March 31, 2013 associated with a consolidated variable interest entity, in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party, with an unpaid principal balance of $29, a recorded investment of $29, and an allowance of $11.