Summary of the Bancorp's Nonperforming Loans and Leases by Class (Detail) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	[1],[2]	$ 458	$ 579
OREO and other repossessed property	[3]	148	165
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		286	367
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		167	228
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases	[4]	53	78
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		57	57
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		6
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		3	4
Residential Mortgage Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		55	77
Consumer Portfolio Segment
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		117	135
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		82	93
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		2	1
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications [Line Items]
Nonperforming Loans and Leases		$ 33	$ 41

[1] Excludes $2 and $39 of nonaccrual loans held for sale at September 30, 2015 and December 31, 2014, respectively.

[2] Includes $8 and $9 of nonaccrual government insured commercial loans whose repayments are insured by the SBA at September 30, 2015 and December 31, 2014, respectively, and $4 of restructured nonaccrual government insured commercial loans at both September 30, 2015 and December 31, 2014.

[3] Excludes $18 and $71 of OREO related to government insured loans at September 30, 2015 and December 31, 2014, respectively. The Bancorp has historically excluded government guaranteed loans classified in OREO from its nonperforming asset disclosures. Upon the prospective adoption on January 1, 2015 of ASU 2014-14 “Classification of Certain Government-Guaranteed Mortgage Loans Upon Foreclosure,” government guaranteed loans meeting certain criteria will be reclassified to other receivables rather than OREO upon foreclosure. At September 30, 2015, the Bancorp had $40 of government guaranteed loans classified as other receivables. Refer to Note 3 for further information on the adoption of this amended guidance.

[4] Excludes $21 of restructured nonaccrual loans at both September 30, 2015 and 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.