Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Parenthetical) (Detail) $ in Millions	6 Months Ended				12 Months Ended
	Jun. 30, 2015 USD ($) number		Jun. 30, 2014 number		Dec. 31, 2014 USD ($) number
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 2,315				$ 2,457
Recorded Investment	2,124	[1]			2,233	[2]
Allowance	$ 264				$ 295
Number of Contracts	7,676	[3],[4]	4,698	[5],[6]
Variable Interest Entity, Primary Beneficiary
Financing Receivable, Impaired [Line Items]
Number of Contracts | number	5				5
Commercial Portfolio Segment | Variable Interest Entity, Primary Beneficiary
Financing Receivable, Impaired [Line Items]
Number of Contracts | number					5
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Impaired [Line Items]
Allowance	$ 132				$ 149
Number of Contracts	48	[3],[4]	66	[5],[6]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Impaired [Line Items]
Allowance	$ 7	[7]			14	[8]
Number of Contracts	13	[3],[4]	20	[5],[6]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied | Variable Interest Entity, Primary Beneficiary
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 28				28
Recorded Investment	28				28
Allowance	$ 16				10
Number of Contracts | number	5		5
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Impaired [Line Items]
Allowance	$ 4				4
Number of Contracts	11	[3],[4]	11	[5],[6]
Commercial Portfolio Segment | Troubled Debt Restructuring On Accrual Status
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 769				869
Commercial Portfolio Segment | Troubled Debt Restructuring On Nonaccrual Status
Financing Receivable, Impaired [Line Items]
Recorded Investment	175				214
Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Allowance	$ 65				65
Number of Contracts	554	[3],[4]	572	[5],[6]
Residential Mortgage Loans | Troubled Debt Restructuring On Accrual Status
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 576				485
Residential Mortgage Loans | Troubled Debt Restructuring On Nonaccrual Status
Financing Receivable, Impaired [Line Items]
Recorded Investment	27				33
Consumer Portfolio Segment | Troubled Debt Restructuring On Accrual Status
Financing Receivable, Impaired [Line Items]
Recorded Investment	394				420
Consumer Portfolio Segment | Troubled Debt Restructuring On Nonaccrual Status
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 56				$ 63

[1] Includes $769, $576 and $394, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $175, $27 and $56, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.

[2] Includes $869, $485 and $420, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $214, $33 and $63, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status. Excludes five restructured loans at December 31, 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.

[3] Excludes all loans and leases held for sale and loans acquired with deteriorated credit quality which were accounted for within a pool.

[4] Represents number of loans post-modification.

[5] Excludes all loans and leases held for sale and loans acquired with deteriorated credit quality which were accounted for within a pool.

[6] Excludes all loans and leases held for sale and loans acquired with deteriorated credit quality which were accounted for within a pool.

[7] Excludes five restructured loans at June 30, 2015 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 $16.

[8] Excludes five restructured loans at December 31, 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.