Summary of Loans Modified in a TDR (Detail) (Quarterly, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	2,457	[1],[2]	3,193	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	$ 97	[1],[2]	$ 135	[1],[2]
Increase (Decrease) to ALLL Upon Modification	(1)	[1],[2]	8	[1],[2]
Charge-offs Recognized Upon Modification			1	[1],[2]
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	22	[1],[2]	20	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	19	[1],[2]	9	[1],[2]
Increase (Decrease) to ALLL Upon Modification	(4)	[1],[2]	1	[1],[2]
Charge-offs Recognized Upon Modification			1	[1],[2]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	16	[1],[2]	10	[1],[2],[3]
Recorded Investment in Loans Modified in a TDR During the Period	12	[1],[2]	4	[1],[2],[3]
Increase (Decrease) to ALLL Upon Modification	(1)	[1],[2]	(1)	[1],[2],[3]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	7	[1],[2]	15	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	6	[1],[2]	17	[1],[2]
Increase (Decrease) to ALLL Upon Modification	(1)	[1],[2]	(1)	[1],[2]
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period			1	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period			6	[1],[2]
Increase (Decrease) to ALLL Upon Modification			(1)	[1],[2]
Residential Mortgage Loans
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	310	[1],[2]	394	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	45	[1],[2]	61	[1],[2]
Increase (Decrease) to ALLL Upon Modification	3	[1],[2]	8	[1],[2]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	35	[1],[2]	326	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	1	[1],[2]	17	[1],[2]
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	116	[1],[2]	115	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	2	[1],[2]	7	[1],[2]
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications
Number of Loans Modified in a TDR During the Period	1,951	[1],[2]	2,312	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	12	[1],[2]	14	[1],[2]
Increase (Decrease) to ALLL Upon Modification	$ 2	[1],[2]	$ 2	[1],[2]

[1] Excludes all loans and leases held for sale and loans acquired with deteriorated credit quality.

[2] Represents number of loans post-modification.

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