Summary of Loans Modified in a TDR (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended								3 Months Ended	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014 Commercial Portfolio Segment Commercial Mortgage Loans, Owner Occupied		Jun. 30, 2013 Commercial Portfolio Segment Commercial Mortgage Loans, Owner Occupied		Jun. 30, 2014 Commercial Portfolio Segment Commercial Mortgage Loans, Owner Occupied Consolidated Variable Interest Entity	Jun. 30, 2014 Commercial Portfolio Segment Commercial Mortgage Loans, Owner Occupied Consolidated Variable Interest Entity
Financing Receivable, Modifications
Financing Receivable, Modifications, Number of Contracts	4,698	[1],[2]	6,181	[1],[2]	20	[1],[2]	24	[1],[2],[3]	5
Financing Receivable Modifications Post Modification Recorded Investment	$ 292	[1]	$ 384	[1]	$ 51	[1]	$ 9	[1],[3]		$ 29
Allowance for Loan and Lease Losses, Adjustments, Net	9	[1]	14	[1]	(1)	[1]	(1)	[1],[3]		7
Allowance for Loan and Lease Losses, Write-offs			$ 1	[1]						$ 2

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

[2] Represents number of loans post-modification.

[3] Excludes five loans modified in a TDR during the six months ended June 30, 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. The TDR had a recorded investment of $29, ALLL increased $7 upon modification, and a charge-off of $2 was recognized upon modification.