Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	$ 2,348		$ 2,729
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	997		891
Unpaid Principal Balance	3,345		3,620
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	2,158		2,539
Impaired Financing Receivable With No Related Allowance Recorded Investment	881		814
Recorded Investment	3,039	[1]	3,353	[2]
Allowance	378		367
Commercial Portfolio Segment | Commercial and Industrial Loans
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	708		870
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	293		181
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	582		759
Impaired Financing Receivable With No Related Allowance Recorded Investment	238		177
Allowance	172		145
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	47	[3]	85	[4]
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	99		106
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	41	[3]	74	[4]
Impaired Financing Receivable With No Related Allowance Recorded Investment	89		98
Allowance	7	[3]	11	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	87		154
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	219		154
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	68		134
Impaired Financing Receivable With No Related Allowance Recorded Investment	203		147
Allowance	5		14
Commercial Portfolio Segment | Commercial Construction
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	36		68
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	47		77
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	33		54
Impaired Financing Receivable With No Related Allowance Recorded Investment	47		63
Allowance	1		5
Commercial Portfolio Segment | Commercial Leases
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	10		12
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	4		14
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	10		12
Impaired Financing Receivable With No Related Allowance Recorded Investment	4		14
Allowance	4
Residential Mortgage Loans
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	1,019		1,081
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	290		313
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	989		1,052
Impaired Financing Receivable With No Related Allowance Recorded Investment	261		273
Allowance	127		139
Consumer Portfolio Segment | Home Equity
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	355		377
Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance	42		43
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	350		373
Impaired Financing Receivable With No Related Allowance Recorded Investment	37		39
Allowance	40		39
Consumer Portfolio Segment | Automobile Loans
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	21		23
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	20		23
Impaired Financing Receivable With No Related Allowance Recorded Investment	2		3
Allowance	4		3
Consumer Portfolio Segment | Credit Card
Impaired Financing Receivable Unpaid Principal Balance
Impaired Financing Receivable With Related Allowance Unpaid Principal Balance	65		59
Impaired Financing Receivable Recorded Investment Abstract
Impaired Financing Receivable With Related Allowance Recorded Investment	65		58
Allowance	$ 18		$ 11

[1] Includes $885, $1,190 and $420, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $201, $60 and $54, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.

[2] Includes $869, $1,241 and $444, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $228, $84 and $52, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status. Excludes five restructured loans at December 31, 2013 associated with a consolidated VIE 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 $28, a recorded investment of $28, and an allowance of $11.

[3] Excludes five restructured loans at September 30, 2014 associated with a consolidated VIE 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 $28, a recorded investment of $28, and an allowance of $10.

[4] Excludes five restructured loans at December 31, 2013 associated with a consolidated VIE 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 $28, a recorded investment of $28, and an allowance of $11.