2.4.0.8020060 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1false falsefalsec_S000003946_benchmark0093_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00RatioStandardhttp://www.xbrl.org/2003/instancepurexbrli01false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse1false truefalsec_S000003946_benchmark0093_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseRussell 3000® Growth Index (reflects no deduction for fees, expenses, or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_benchmark0093BBBBMemberrr_PerformanceMeasureAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Russell 3000® Growth Index (reflects no deduction for fees, expenses, or taxes)2true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:3false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.1520.152falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year4false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03150.0315falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years5false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.07690.0769falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years6false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false truefalsec_S000003946_C000011055_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011055Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Class A7true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:8false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08680.0868falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year9false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0520.052falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years10false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09580.0958falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years11false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse3false truefalsec_S000003946_C000011055_AfterTaxesOnDistributions_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011055Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalsereturn after taxes on distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Class A | return after taxes on distributions12true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:13false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08680.0868falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year14false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0520.052falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years15false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09580.0958falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years16false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse4false truefalsec_S000003946_C000011055_AfterTaxesOnDistributionsAndSales_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011055Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalsereturn after taxes on distributions and sale of Fund sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Class A | return after taxes on distributions and sale of Fund shares17true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:18false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05640.0564falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year19false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04490.0449falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years20false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08560.0856falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years21false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse5false truefalsec_S000003946_C000011056_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011056Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Class B22true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:23false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.10450.1045falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year24false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0530.053falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years25false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09570.0957falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years26false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse6false truefalsec_S000003946_C000011057_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011057Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Class C27true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:28false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.13480.1348falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year29false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05660.0566falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years30false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.09420.0942falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years31false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse7false truefalsec_S000003946_C000011058_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Rrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011058Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Class R32true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:33false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00(lifetime:6/2/03–12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label34false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15020.1502falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year35false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.06180.0618falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years36false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08130.0813falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime37false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse8false truefalsec_S000003946_C000011059_BBBBhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_BBBBMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Select Growth Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000003946Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Classrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000011059Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Select Growth Fund) | Institutional Class38true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:39false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.1560.156falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year40false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.06730.0673falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years41false 2rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.10520.1052falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false010 Years42false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse9false truefalsec_S000013156_benchmark147_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseS&P 500 Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_benchmark147AAAAMemberrr_PerformanceMeasureAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | S&P 500 Index (reflects no deduction for fees, expenses or taxes)43true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:44false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label45false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.160.16falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year46false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01660.0166falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years47false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03630.0363falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime48false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse10false truefalsec_S000013156_C000035413_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000035413Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | Class A49true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:50false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label51false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08480.0848falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year52false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0057-0.0057falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years53false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01960.0196falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime54false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse11false truefalsec_S000013156_C000035413_AfterTaxesOnDistributions_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000035413Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalsereturn after taxes on distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | Class A | return after taxes on distributions55true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:56false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label57false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08330.0833falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year58false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0071-0.0071falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years59false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01680.0168falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime60false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse12false truefalsec_S000013156_C000035413_AfterTaxesOnDistributionsAndSales_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000035413Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalsereturn after taxes on distributions and sale of Fund sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | Class A | return after taxes on distributions and sale of Fund shares61true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:62false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label63false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05710.0571falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year64false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0051-0.0051falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years65false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01610.0161falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime66false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse13false truefalsec_S000013156_C000035414_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000035414Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | Class C67true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:68false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label69false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00  falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year70false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00  falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years71false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00  falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime72false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse14false truefalsec_S000013156_C000035416_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Classrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000035416Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | Institutional Class73true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:74false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label75false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.15050.1505falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year76false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00610.0061falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years77false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02920.0292falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Lifetime78false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse15false truefalsec_S000013156_C000035415_AAAAhttp://www.sec.gov/CIK0000763749duration2013-08-28T00:00:002013-08-28T00:00:00falsefalsedei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_AAAAMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalse(Delaware Large Cap Core Fund)dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_S000013156Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass Rrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldivoyageuriii-20130828_C000035415Memberrr_ProspectusShareClassAxisexplicitMemberRatioStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0(Delaware Large Cap Core Fund) | Class R79true 1rr_AverageAnnualReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Average Annual Return:80false 2rr_AverageAnnualReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Lifetime (8/31/06 to 12/31/12)falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0Label81false 2rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00  falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false01 Year82false 2rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00  falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false05 Years83false 2rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00  falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b false0LifetimefalseAverage Annual Total Returns (dei_DocumentInformationDocumentAxis)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://xbrl.sec.gov/rr/role/PerformanceTableData183