Summary of Loans Modified in a TDR (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 number		Dec. 31, 2012 number
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	11,291	[1],[2]	16,064	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	$ 1,081	[1]	$ 793	[1]
Increase (Decrease) to ALLL Upon Modification	58	[1]	24	[1]
Charge-offs Recognized Upon Modification	44	[1]	11	[1]
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	146	[1],[2]	108	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	604	[1]	84	[1]
Increase (Decrease) to ALLL Upon Modification	39	[1]	(7)	[1]
Charge-offs Recognized Upon Modification	44	[1]	9	[1]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	65	[1],[2],[3]	67	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	19	[1],[3]	53	[1]
Increase (Decrease) to ALLL Upon Modification	(2)	[1],[3]	(8)	[1]
Charge-offs Recognized Upon Modification			2	[1]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	59	[1],[2]	67	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	72	[1]	91	[1]
Increase (Decrease) to ALLL Upon Modification	(7)	[1]	(7)	[1]
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	4	[1],[2]	17	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	34	[1]	38	[1]
Increase (Decrease) to ALLL Upon Modification	(2)	[1]	(4)	[1]
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	1	[1],[2]	8	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	2	[1]	7	[1]
Increase (Decrease) to ALLL Upon Modification	(5)	[1]	1	[1]
Residential Mortgage Loans
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	1,620	[1],[2]	1,758	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	249	[1]	340	[1]
Increase (Decrease) to ALLL Upon Modification	28	[1]	35	[1]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	695	[1],[2]	1,343	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	37	[1]	82	[1]
Increase (Decrease) to ALLL Upon Modification	(1)	[1]	1	[1]
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	499	[1],[2]	1,289	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	14	[1]	23	[1]
Increase (Decrease) to ALLL Upon Modification	1	[1]	2	[1]
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications [Line Items]
Number of Loans Modified in a TDR During the Period	8,202	[1],[2]	11,407	[1],[2]
Recorded Investment in Loans Modified in a TDR During the Period	50	[1]	75	[1]
Increase (Decrease) to ALLL Upon Modification	$ 7	[1]	$ 11	[1]

[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 year ended December 31, 2013 associated with a consolidated variable interest entity in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party. The TDR resulted in a $7 increase to the ALLL and a $2 charge-off at modification and has a recorded investment of $28.