Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) - USD ($) $ in Millions	Jun. 30, 2015		Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	$ 91,923	[1],[2]	$ 89,272	[3],[4]
30-89 Days Past Due	255	[1],[2]	297	[3],[4]
90 Days and Greater	347	[1],[2]	407	[3],[4]
Total Past Due	602	[1]	704	[3]
Total Loans and Leases	92,525	[1]	89,976	[3]
90-Days past Due and Still Accruing	70	[1]	87	[3]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans and Leases	56,540		53,953
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	42,683	[2]	40,651	[4]
30-89 Days Past Due	39	[2]	29	[4]
90 Days and Greater	78	[2]	85	[4]
Total Past Due	117		114
Total Loans and Leases	42,800		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	3,780	[2]	3,774	[4]
30-89 Days Past Due	10	[2]	7	[4]
90 Days and Greater	39	[2]	53	[4]
Total Past Due	49		60
Total Loans and Leases	3,829		3,834
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,296	[2]	3,537	[4]
30-89 Days Past Due	2	[2]	11	[4]
90 Days and Greater	23	[2]	17	[4]
Total Past Due	25		28
Total Loans and Leases	3,321		3,565
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	2,709	[2]	2,069	[4]
Total Loans and Leases	2,709		2,069
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,879	[2]	3,717	[4]
30-89 Days Past Due	2	[2]	3	[4]
Total Past Due	2		3
Total Loans and Leases	3,881		3,720
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	12,614	[1],[2],[5]	12,109	[3],[4],[6]
30-89 Days Past Due	35	[1],[2],[5]	38	[3],[4],[6]
90 Days and Greater	106	[1],[2],[5]	134	[3],[4],[6]
Total Past Due	141	[1],[5]	172	[3],[6]
Total Loans and Leases	12,755	[1],[5]	12,281	[3],[6]
90-Days past Due and Still Accruing	43	[1],[5]	56	[3],[6]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	8,398	[2]	8,710	[4]
30-89 Days Past Due	81	[2]	100	[4]
90 Days and Greater	68	[2]	76	[4]
Total Past Due	149		176
Total Loans and Leases	8,547		8,886
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	11,840	[2]	11,953	[4]
30-89 Days Past Due	59	[2]	74	[4]
90 Days and Greater	10	[2]	10	[4]
Total Past Due	69		84
Total Loans and Leases	11,909		12,037
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	2,229	[2]	2,335	[4]
30-89 Days Past Due	26	[2]	34	[4]
90 Days and Greater	23	[2]	32	[4]
Total Past Due	49		66
Total Loans and Leases	2,278		2,401
90-Days past Due and Still Accruing	17		23
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	495	[2]	417	[4]
30-89 Days Past Due	1	[2]	1	[4]
Total Past Due	1		1
Total Loans and Leases	$ 496		$ 418

[1] Excludes $178 of residential mortgage loans measured at fair value.

[2] Includes accrual and nonaccrual loans and leases.

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

[4] Includes accrual and nonaccrual loans and leases.

[5] Information for current residential mortgage loans includes loans whose repayments are insured by the FHA or guaranteed by the VA. As of June 30, 2015, $90 of these loans were 30-89 days past due and $342 were 90 days or more past due. The Bancorp recognized $2 and $4 of losses during the three and six months ended June 30, 2015, respectively, due to claim denials and curtailments associated with these insured or guaranteed loans.

[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 $2 and $7 of losses during the three and six months ended June 30, 2014, respectively, due to claim denials and curtailments associated with these insured or guaranteed loans.