Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	$ 89,745	[1],[2]	$ 87,534	[1],[3]
30-89 Days Past Due	338	[1],[2]	345	[1],[3]
90 Days and Greater	432	[1],[2]	643	[1],[3]
Total Past Due	770	[2]	988	[3]
Total Loans and Leases	90,515	[2]	88,522	[3]
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	53,892		52,046
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	40,942	[1]	39,118	[1]
30-89 Days Past Due	41	[1]	53	[1]
90 Days and Greater	89	[1]	145	[1]
Total Past Due	130		198
Total Loans and Leases	41,072		39,316
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,914	[1]	4,423	[1]
30-89 Days Past Due	16	[1]	15	[1]
90 Days and Greater	44	[1]	69	[1]
Total Past Due	60		84
Total Loans and Leases	3,974		4,507
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,561	[1]	3,515	[1]
30-89 Days Past Due	6	[1]	9	[1]
90 Days and Greater	23	[1]	35	[1]
Total Past Due	29		44
Total Loans and Leases	3,590		3,559
90-Days past Due and Still Accruing	1
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	1,700	[1]	1,010	[1]
90 Days and Greater	2	[1]	29	[1]
Total Past Due	2		29
Total Loans and Leases	1,702		1,039
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,554	[1]	3,620	[1]
90 Days and Greater			5	[1]
Total Past Due			5
Total Loans and Leases	3,554		3,625
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	12,578	[1],[2],[4]	12,284	[1],[3],[5]
30-89 Days Past Due	86	[1],[2],[4]	73	[1],[3],[5]
90 Days and Greater	168	[1],[2],[4]	231	[1],[3],[5]
Total Past Due	254	[2],[4]	304	[3],[5]
Total Loans and Leases	12,832	[2],[4]	12,588	[3],[5]
90-Days past Due and Still Accruing	57	[2],[4]	66	[3],[5]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	8,819	[1]	9,058	[1]
30-89 Days Past Due	100	[1]	102	[1]
90 Days and Greater	68	[1]	86	[1]
Total Past Due	168		188
Total Loans and Leases	8,987		9,246
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	12,057	[1]	11,919	[1]
30-89 Days Past Due	55	[1]	55	[1]
90 Days and Greater	9	[1]	10	[1]
Total Past Due	64		65
Total Loans and Leases	12,121		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	2,256	[1]	2,225	[1]
30-89 Days Past Due	32	[1]	36	[1]
90 Days and Greater	29	[1]	33	[1]
Total Past Due	61		69
Total Loans and Leases	2,317		2,294
90-Days past Due and Still Accruing	21		29
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	364	[1]	362	[1]
30-89 Days Past Due	2	[1]	2	[1]
Total Past Due	2		2
Total Loans and Leases	$ 366		$ 364

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $109 of loans measured at fair value.

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

[4] Information for current residential mortgage loans includes loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of September 30, 2014, $92 of these loans were 30-89 days past due and $351 were 90 days or more past due. The Bancorp recognized $2 and $9 of losses during the three and nine months ended September 30, 2014, respectively, due to claim denials and curtailments associated with these insured or guaranteed loans.

[5] Information for current residential mortgage loans includes loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. 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.