Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	$ 89,272	[1],[2]	$ 87,534	[1],[3]
30-89 Days Past Due	297	[1],[2]	345	[1],[3]
90 Days and Greater	407	[1],[2]	643	[1],[3]
Total Past Due	704	[2]	988	[3]
Total loans and leases	89,976	[2],[4]	88,522	[3],[5]
90-Days past Due and Still Accruing	87	[2]	103	[3]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases	53,953		52,046
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	40,651	[1]	39,118	[1]
30-89 Days Past Due	29	[1]	53	[1]
90 Days and Greater	85	[1]	145	[1]
Total Past Due	114		198
Total loans and leases	40,765		39,316
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,774	[1]	4,423	[1]
30-89 Days Past Due	7	[1]	15	[1]
90 Days and Greater	53	[1]	69	[1]
Total Past Due	60		84
Total loans and leases	3,834		4,507
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,537	[1]	3,515	[1]
30-89 Days Past Due	11	[1]	9	[1]
90 Days and Greater	17	[1]	35	[1]
Total Past Due	28		44
Total loans and leases	3,565		3,559
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	2,069	[1]	1,010	[1]
90 Days and Greater			29	[1]
Total Past Due			29
Total loans and leases	2,069		1,039
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,717	[1]	3,620	[1]
30-89 Days Past Due	3	[1]
90 Days and Greater			5	[1]
Total Past Due	3		5
Total loans and leases	3,720		3,625
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	12,109	[1],[2],[6]	12,284	[1],[3],[7]
30-89 Days Past Due	38	[1],[2],[6]	73	[1],[3],[7]
90 Days and Greater	134	[1],[2],[6]	231	[1],[3],[7]
Total Past Due	172	[2],[6]	304	[3],[7]
Total loans and leases	12,281	[2],[6]	12,588	[3],[7]
90-Days past Due and Still Accruing	56	[2],[6]	66	[3],[7]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	8,710	[1]	9,058	[1]
30-89 Days Past Due	100	[1]	102	[1]
90 Days and Greater	76	[1]	86	[1]
Total Past Due	176		188
Total loans and leases	8,886		9,246
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	11,953	[1]	11,919	[1]
30-89 Days Past Due	74	[1]	55	[1]
90 Days and Greater	10	[1]	10	[1]
Total Past Due	84		65
Total loans and leases	12,037		11,984
90-Days past Due and Still Accruing	8		8
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	2,335	[1]	2,225	[1]
30-89 Days Past Due	34	[1]	36	[1]
90 Days and Greater	32	[1]	33	[1]
Total Past Due	66		69
Total loans and leases	2,401		2,294
90-Days past Due and Still Accruing	23		29
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	417	[1]	362	[1]
30-89 Days Past Due	1	[1]	2	[1]
Total Past Due	1		2
Total loans and leases	$ 418		$ 364

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $108 of loans measured at fair value.

[3] Excludes $92 of loans measured at fair value.

[4] Excludes $108 of residential mortgage loans measured at fair value, and includes $874 of leveraged leases, net of unearned income.

[5] Excludes $92 of residential mortgage loans measured at fair value, and includes $881 of leveraged leases, net of unearned income.

[6] Information for current residential mortgage loans includes loans whose repayments are insured by the FHA or guaranteed by the VA. As of December 31, 2014, $99 of these loans were 30-89 days past due and $373 were 90 days or more past due. The Bancorp recognized $14 of losses for the year ended December 31, 2014 due to claim denials and curtailments associated with these insured or guaranteed loans.

[7] Information for current residential mortgage loans includes loans whose repayments are insured by the FHA or guaranteed by the VA. As of December 31, 2013, $81 of these loans were 30-89 days past due and $378 were 90 days or more past due. The Bancorp recognized $5 of losses for the year ended December 31, 2013 due to claim denials and curtailments associated with these insured or guaranteed loans.