Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	$ 84,381	[1],[2],[3]	$ 79,207	[1],[4],[5]
30-89 Days Past Due	413	[1],[2],[3]	519	[1],[4],[5]
90 Days and Greater	912	[1],[2],[3]	1,227	[1],[4],[5]
Total Past Due	1,325	[2],[3]	1,746	[4],[5]
Total Loand and Leases	85,706	[2],[3]	80,953	[4],[5],[6]
90-Days past Due and Still Accruing	195	[2],[3]	200	[4],[5]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loand and Leases	49,388	[7]	45,472	[6]
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	35,826	[1]	30,493	[1]
30-89 Days Past Due	46	[1]	49	[1]
90 Days and Greater	166	[1]	241	[1]
Total Past Due	212		290
Total Loand and Leases	36,038		30,783
90-Days past Due and Still Accruing	1		4
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	4,752	[1]	5,088	[1]
30-89 Days Past Due	29	[1]	62	[1]
90 Days and Greater	95	[1]	116	[1]
Total Past Due	124		178
Total Loand and Leases	4,876		5,266
90-Days past Due and Still Accruing	22		1
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	4,094	[1]	4,649	[1]
30-89 Days Past Due	21	[1]	41	[1]
90 Days and Greater	112	[1]	182	[1]
Total Past Due	133		223
Total Loand and Leases	4,227		4,872
90-Days past Due and Still Accruing			2
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	622	[1]	887	[1]
30-89 Days Past Due			12	[1]
90 Days and Greater	76	[1]	121	[1]
Total Past Due	76		133
Total Loand and Leases	698		1,020
90-Days past Due and Still Accruing	1		1
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,546	[1]	3,521	[1]
30-89 Days Past Due	2	[1]	4	[1]
90 Days and Greater	1	[1]	6	[1]
Total Past Due	3		10
Total Loand and Leases	3,549		3,531
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	11,547	[1],[2],[8]	10,149	[1],[4],[9]
30-89 Days Past Due	87	[1],[2],[8]	110	[1],[4],[9]
90 Days and Greater	307	[1],[2],[8]	348	[1],[4],[9]
Total Past Due	394	[2],[8]	458	[4],[9]
Total Loand and Leases	11,941	[2],[8]	10,607	[4],[9]
90-Days past Due and Still Accruing	75	[2],[8]	79	[4],[9]
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loand and Leases	24,377	[7]	24,874	[6]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	9,782	[1]	10,455	[1]
30-89 Days Past Due	126	[1]	136	[1]
90 Days and Greater	110	[1]	128	[1]
Total Past Due	236		264
Total Loand and Leases	10,018		10,719
90-Days past Due and Still Accruing	58		74
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	11,900	[1]	11,744	[1]
30-89 Days Past Due	62	[1]	71	[1]
90 Days and Greater	10	[1]	12	[1]
Total Past Due	72		83
Total Loand and Leases	11,972		11,827
90-Days past Due and Still Accruing	8		9
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	2,025	[1]	1,873	[1]
30-89 Days Past Due	38	[1]	33	[1]
90 Days and Greater	34	[1]	72	[1]
Total Past Due	72		105
Total Loand and Leases	2,097		1,978
90-Days past Due and Still Accruing	30		30
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	287	[1]	348	[1]
30-89 Days Past Due	2	[1]	1	[1]
90 Days and Greater	1	[1]	1	[1]
Total Past Due	3		2
Total Loand and Leases	$ 290		$ 350

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $76 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 Small Business Administration at December 31, 2012.

[4] Excludes $65 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 Small Business Administration at December 31, 2011.

[6] Excludes $65 of residential mortgage loans measured at fair value, and includes $1,022 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 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 million of losses for the year ended December 31, 2012 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, 2011, $45 of these loans were 30-89 days past due and $309 were 90 days or more past due. The Bancorp recognized an immaterial amount of losses for the year ended December 31, 2011 due to claim denials and curtailments associated with these advances.