Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	$ 85,912	[1],[2],[3]	$ 84,381	[1],[4],[5]
30-89 Days Past Due	286	[1],[2],[3]	413	[1],[4],[5]
90 Days and Greater	751	[1],[2],[3]	912	[1],[4],[5]
Total Past Due	1,037	[2],[3]	1,325	[4],[5]
Total Loans and Leases	86,949	[2],[3],[6]	85,706	[4],[5]
90-Days past Due and Still Accruing	152	[2],[3]	195	[4],[5]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total Loans and Leases	50,620	[6]	49,388	[7]
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	37,691	[1]	35,826	[1]
30-89 Days Past Due	15	[1]	46	[1]
90 Days and Greater	150	[1]	166	[1]
Total Past Due	165		212
Total Loans and Leases	37,856		36,038
90-Days past Due and Still Accruing			1
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	4,628	[1]	4,752	[1]
30-89 Days Past Due	6	[1]	29	[1]
90 Days and Greater	84	[1]	95	[1]
Total Past Due	90		124
Total Loans and Leases	4,718		4,876
90-Days past Due and Still Accruing			22
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,646	[1]	4,094	[1]
30-89 Days Past Due	11	[1]	21	[1]
90 Days and Greater	68	[1]	112	[1]
Total Past Due	79		133
Total Loans and Leases	3,725		4,227
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	712	[1]	622	[1]
90 Days and Greater	42	[1]	76	[1]
Total Past Due	42		76
Total Loans and Leases	754		698
90-Days past Due and Still Accruing			1
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,560	[1]	3,546	[1]
30-89 Days Past Due			2	[1]
90 Days and Greater	7	[1]	1	[1]
Total Past Due	7		3
Total Loans and Leases	3,567		3,549
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	11,985	[1],[2],[8]	11,547	[1],[4],[9]
30-89 Days Past Due	65	[1],[2],[8]	87	[1],[4],[9]
90 Days and Greater	267	[1],[2],[8]	307	[1],[4],[9]
Total Past Due	332	[2],[8]	394	[4],[9]
Total Loans and Leases	12,317	[2],[8]	11,941	[4],[9]
90-Days past Due and Still Accruing	71	[2],[8]	75	[4],[9]
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total Loans and Leases	24,012	[6]	24,377	[7]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	9,330	[1]	9,782	[1]
30-89 Days Past Due	107	[1]	126	[1]
90 Days and Greater	94	[1]	110	[1]
Total Past Due	201		236
Total Loans and Leases	9,531		10,018
90-Days past Due and Still Accruing	48		58
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	11,958	[1]	11,900	[1]
30-89 Days Past Due	48	[1]	62	[1]
90 Days and Greater	9	[1]	10	[1]
Total Past Due	57		72
Total Loans and Leases	12,015		11,972
90-Days past Due and Still Accruing	6		8
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	2,052	[1]	2,025	[1]
30-89 Days Past Due	32	[1]	38	[1]
90 Days and Greater	30	[1]	34	[1]
Total Past Due	62		72
Total Loans and Leases	2,114		2,097
90-Days past Due and Still Accruing	27		30
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	350	[1]	287	[1]
30-89 Days Past Due	2	[1]	2	[1]
90 Days and Greater			1	[1]
Total Past Due	2		3
Total Loans and Leases	$ 352		$ 290

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $83 of loans measured at fair value.

[3] Includes an immaterial amount of government insured commercial loans 30-89 days and 90 days past due and accruing whose repayments are insured by the SBA at June 30, 2013.

[4] Excludes $76 of loans measured at fair value.

[5] Includes an immaterial amount of government insured commercial loans 30-89 and 90 days past due and accruing whose repayments are insured by the SBA at December 31, 2012.

[6] Excludes $83 of residential mortgage loans measured at fair value, and includes $872 of leveraged leases, net of unearned income.

[7] Excludes $76 of residential mortgage loans measured at fair value, and includes $862 of leveraged leases, net of unearned income.

[8] Information for current residential mortgage loans includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of June 30, 2013, $68 of these loans were 30-89 days past due and $403 were 90 days or more past due. The Bancorp recognized $1 of losses during the three and six months ended June 30, 2013 due to claim denials and curtailments associated with these advances.

[9] Information for current residential mortgage loans includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of December 31, 2012, $80 of these loans were 30-89 days past due and $414 were 90 days or more past due. The Bancorp recognized $2 of losses for the year ended December 31, 2012 due to claim denials and curtailments associated with these advances.