Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	$ 86,187	[1],[2]	$ 84,381	[1],[3],[4]
30-89 Days Past Due	304	[1],[2]	413	[1],[3],[4]
90 Days and Greater	651	[1],[2]	912	[1],[3],[4]
Total Past Due	955	[2]	1,325	[3],[4]
Total Loans and Leases	87,142	[2]	85,706	[3],[4]
90-Days past Due and Still Accruing	156	[2]	195	[3],[4]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total Loans and Leases	50,752	[5]	49,388	[6]
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	38,083	[1]	35,826	[1]
30-89 Days Past Due	36	[1]	46	[1]
90 Days and Greater	134	[1]	166	[1]
Total Past Due	170		212
Total Loans and Leases	38,253		36,038
90-Days past Due and Still Accruing	3		1
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	4,492	[1]	4,752	[1]
30-89 Days Past Due	8	[1]	29	[1]
90 Days and Greater	72	[1]	95	[1]
Total Past Due	80		124
Total Loans and Leases	4,572		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	3,423	[1]	4,094	[1]
30-89 Days Past Due	11	[1]	21	[1]
90 Days and Greater	46	[1]	112	[1]
Total Past Due	57		133
Total Loans and Leases	3,480		4,227
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	844	[1]	622	[1]
90 Days and Greater	31	[1]	76	[1]
Total Past Due	31		76
Total Loans and Leases	875		698
90-Days past Due and Still Accruing			1
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,571	[1]	3,546	[1]
30-89 Days Past Due			2	[1]
90 Days and Greater	1	[1]	1	[1]
Total Past Due	1		3
Total Loans and Leases	3,572		3,549
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	12,142	[1],[2],[7]	11,547	[1],[3],[8]
30-89 Days Past Due	69	[1],[2],[7]	87	[1],[3],[8]
90 Days and Greater	234	[1],[2],[7]	307	[1],[3],[8]
Total Past Due	303	[2],[7]	394	[3],[8]
Total Loans and Leases	12,445	[2],[7]	11,941	[3],[8]
90-Days past Due and Still Accruing	73	[2],[7]	75	[3],[8]
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total Loans and Leases	23,945	[5]	24,377	[6]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	9,166	[1]	9,782	[1]
30-89 Days Past Due	96	[1]	126	[1]
90 Days and Greater	94	[1]	110	[1]
Total Past Due	190		236
Total Loans and Leases	9,356		10,018
90-Days past Due and Still Accruing	46		58
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	12,016	[1]	11,900	[1]
30-89 Days Past Due	47	[1]	62	[1]
90 Days and Greater	9	[1]	10	[1]
Total Past Due	56		72
Total Loans and Leases	12,072		11,972
90-Days past Due and Still Accruing	8		8
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	2,092	[1]	2,025	[1]
30-89 Days Past Due	35	[1]	38	[1]
90 Days and Greater	30	[1]	34	[1]
Total Past Due	65		72
Total Loans and Leases	2,157		2,097
90-Days past Due and Still Accruing	26		30
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	358	[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	$ 360		$ 290

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $89 of loans measured at fair value.

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

[4] 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.

[5] Excludes $89 of residential mortgage loans measured at fair value, and includes $875 of leveraged leases, net of unearned income.

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

[7] 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 September 30, 2013, $83 of these loans were 30-89 days past due and $379 were 90 days or more past due. The Bancorp recognized $1 and $2 of losses during the three and nine months ended September 30, 2013, respectively, due to claim denials and curtailments associated with these advances.

[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 of losses for the year ended December 31, 2012 due to claim denials and curtailments associated with these advances.