Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	$ 90,510	[1],[2]	$ 89,272	[1],[3]
30-89 Days Past Due	242	[1],[2]	297	[1],[3]
90 Days and Greater	366	[1],[2]	407	[1],[3]
Total Past Due	608	[2]	704	[3]
Total Loans and Leases	91,118	[2]	89,976	[3]
90-Days past Due and Still Accruing	78	[2]	87	[3]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans and Leases	55,349		53,953
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	41,949	[1]	40,651	[1]
30-89 Days Past Due	33	[1]	29	[1]
90 Days and Greater	70	[1]	85	[1]
Total Past Due	103		114
Total Loans and Leases	42,052		40,765
90-Days past Due and Still Accruing	2
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,755	[1]	3,774	[1]
30-89 Days Past Due	14	[1]	7	[1]
90 Days and Greater	41	[1]	53	[1]
Total Past Due	55		60
Total Loans and Leases	3,810		3,834
90-Days past Due and Still Accruing	1
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,368	[1]	3,537	[1]
30-89 Days Past Due	5	[1]	11	[1]
90 Days and Greater	26	[1]	17	[1]
Total Past Due	31		28
Total Loans and Leases	3,399		3,565
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	2,302	[1]	2,069	[1]
Total Loans and Leases	2,302		2,069
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,783	[1]	3,717	[1]
30-89 Days Past Due			3	[1]
90 Days and Greater	3	[1]
Total Past Due	3		3
Total Loans and Leases	3,786		3,720
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	12,293	[1],[2],[4]	12,109	[1],[3],[5]
30-89 Days Past Due	31	[1],[2],[4]	38	[1],[3],[5]
90 Days and Greater	119	[1],[2],[4]	134	[1],[3],[5]
Total Past Due	150	[2],[4]	172	[3],[5]
Total Loans and Leases	12,443	[2],[4]	12,281	[3],[5]
90-Days past Due and Still Accruing	48	[2],[4]	56	[3],[5]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	8,561	[1]	8,710	[1]
30-89 Days Past Due	82	[1]	100	[1]
90 Days and Greater	71	[1]	76	[1]
Total Past Due	153		176
Total Loans and Leases	8,714		8,886
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	11,813	[1]	11,953	[1]
30-89 Days Past Due	51	[1]	74	[1]
90 Days and Greater	9	[1]	10	[1]
Total Past Due	60		84
Total Loans and Leases	11,873		12,037
90-Days past Due and Still Accruing	7		8
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	2,239	[1]	2,335	[1]
30-89 Days Past Due	25	[1]	34	[1]
90 Days and Greater	27	[1]	32	[1]
Total Past Due	52		66
Total Loans and Leases	2,291		2,401
90-Days past Due and Still Accruing	20		23
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	447	[1]	417	[1]
30-89 Days Past Due	1	[1]	1	[1]
Total Past Due	1		1
Total Loans and Leases	$ 448		$ 418

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $126 of loans measured at fair value.

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

[4] Information for current residential mortgage loans includes loans whose repayments are insured by the FHA or guaranteed by the VA. As of March 31, 2015, $79 of these loans were 30-89 days past due and $375 were 90 days or more past due. The Bancorp recognized $2 of losses during the three months ended March 31, 2015, 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 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 $5 of losses during the three months ended March 31, 2014 due to claim denials and curtailments associated with these insured or guaranteed loans.