Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	$ 84,365	[1],[2],[3]	$ 84,381	[1],[4],[5]
30-89 Days Past Due	384	[1],[2],[3]	413	[1],[4],[5]
90 Days and Greater	846	[1],[2],[3]	912	[1],[4],[5]
Total Past Due	1,230	[2],[3]	1,325	[4],[5]
Total Loans and Leases	85,595	[2],[3],[6]	85,706	[4],[5]
90-Days past Due and Still Accruing	164	[2],[3]	195	[4],[5]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total Loans and Leases	49,785	[6]	49,388	[7]
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	36,507	[1]	35,826	[1]
30-89 Days Past Due	73	[1]	46	[1]
90 Days and Greater	177	[1]	166	[1]
Total Past Due	250		212
Total Loans and Leases	36,757		36,038
90-Days past Due and Still Accruing	1		1
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,858	[1]	4,752	[1]
30-89 Days Past Due	25	[1]	29	[1]
90 Days and Greater	87	[1]	95	[1]
Total Past Due	112		124
Total Loans and Leases	3,970		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	4,710	[1]	4,094	[1]
30-89 Days Past Due	10	[1]	21	[1]
90 Days and Greater	76	[1]	112	[1]
Total Past Due	86		133
Total Loans and Leases	4,796		4,227
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	625	[1]	622	[1]
90 Days and Greater	69	[1]	76	[1]
Total Past Due	69		76
Total Loans and Leases	694		698
90-Days past Due and Still Accruing			1
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,562	[1]	3,546	[1]
30-89 Days Past Due	5	[1]	2	[1]
90 Days and Greater	1	[1]	1	[1]
Total Past Due	6		3
Total Loans and Leases	3,568		3,549
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	11,647	[1],[2],[8]	11,547	[1],[4],[9]
30-89 Days Past Due	73	[1],[2],[8]	87	[1],[4],[9]
90 Days and Greater	290	[1],[2],[8]	307	[1],[4],[9]
Total Past Due	363	[2],[8]	394	[4],[9]
Total Loans and Leases	12,010	[2],[8]	11,941	[4],[9]
90-Days past Due and Still Accruing	74	[2],[8]	75	[4],[9]
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total Loans and Leases	23,800	[6]	24,377	[7]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	9,511	[1]	9,782	[1]
30-89 Days Past Due	113	[1]	126	[1]
90 Days and Greater	103	[1]	110	[1]
Total Past Due	216		236
Total Loans and Leases	9,727		10,018
90-Days past Due and Still Accruing	53		58
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	11,682	[1]	11,900	[1]
30-89 Days Past Due	50	[1]	62	[1]
90 Days and Greater	9	[1]	10	[1]
Total Past Due	59		72
Total Loans and Leases	11,741		11,972
90-Days past Due and Still Accruing	7		8
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	1,976	[1]	2,025	[1]
30-89 Days Past Due	33	[1]	38	[1]
90 Days and Greater	34	[1]	34	[1]
Total Past Due	67		72
Total Loans and Leases	2,043		2,097
90-Days past Due and Still Accruing	29		30
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	287	[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	$ 289		$ 290

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $81 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 March 31, 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 $81 of residential mortgage loans measured at fair value, and includes $866 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 March 31, 2013, $71 of these loans were 30-89 days past due and $414 were 90 days or more past due. The Bancorp recognized an immaterial amount of losses during the three months ended March 31, 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.