Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	$ 2,481		$ 2,162
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	1,069		1,006
Unpaid Principal Balance	3,550		3,168
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	2,293		1,967
Impaired Financing Receivable With No Related Allowance Recorded Investment	906		856
Recorded Investment	3,199	[1]	2,823	[2]
Allowance	342		295
Commercial Portfolio Segment | Commercial and Industrial Loans
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	675		263
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	261		207
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	578		194
Impaired Financing Receivable With No Related Allowance Recorded Investment	207		169
Allowance	122		65
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	71	[3]	54
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	107		107
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	59	[3]	43
Impaired Financing Receivable With No Related Allowance Recorded Investment	97		99
Allowance	11	[3]	5
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	117		215
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	268		209
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	86		160
Impaired Financing Receivable With No Related Allowance Recorded Investment	243		199
Allowance	13		16
Commercial Portfolio Segment | Commercial Construction
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	59		48
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	74		109
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	47		37
Impaired Financing Receivable With No Related Allowance Recorded Investment	46		67
Allowance	7		5
Commercial Portfolio Segment | Commercial Leases
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	1		8
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	3		5
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	1		8
Impaired Financing Receivable With No Related Allowance Recorded Investment	3		5
Allowance			5
Residential Mortgage Loans
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	1,079		1,067
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	311		326
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	1,047		1,023
Impaired Financing Receivable With No Related Allowance Recorded Investment	269		275
Allowance	135		137
Consumer Portfolio Segment | Home Equity
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	390		400
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	42		40
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	386		396
Impaired Financing Receivable With No Related Allowance Recorded Investment	38		39
Allowance	41		46
Consumer Portfolio Segment | Automobile Loans
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	24		31
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	3		3
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	24		30
Impaired Financing Receivable With No Related Allowance Recorded Investment	3		3
Allowance	3		4
Consumer Portfolio Segment | Credit Card
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	63		74
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	63		74
Allowance	10		12
Consumer Portfolio Segment | Consumer Other Financing Receivable
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	2		2
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	$ 2		$ 2

[1] Includes $499, $1,233 and $461, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $241, $83 and $55, 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 September 30, 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.