Nomura Asset Strategy FundNomura Asset Strategy FundNomura Balanced FundNomura Balanced FundNomura Core Equity FundNomura Core Equity FundNomura Global Growth FundNomura Global Growth FundNomura International Core Equity FundNomura International Core Equity FundNomura Large Cap Growth FundNomura Large Cap Growth FundNomura Mid Cap Growth FundNomura Mid Cap Growth FundNomura Mid Cap Income Opportunities FundNomura Mid Cap Income Opportunities FundNomura Smid Cap Core FundNomura Smid Cap Core FundNomura Small Cap Growth FundNomura Small Cap Growth FundNomura Systematic Emerging Markets Equity FundNomura Systematic Emerging Markets Equity FundNomura Climate Solutions FundNomura Climate Solutions FundNomura Natural Resources FundNomura Natural Resources FundNomura Real Estate Securities FundNomura Real Estate Securities FundNomura Science and Technology FundNomura Science and Technology FundNomura Global Bond FundNomura Global Bond FundNomura High Income FundNomura High Income FundDjulycombopro_2793DELAWARE GROUP EQUITY FUNDS IV - A, C, R, and InstitutionalClass A - C000017255AClass C - C000017257CClass Institutional - C000045541InstitutionalClass R6 - C000146677R6Class R - C000066833RClass Y - C000017258YClass A - C000073854AClass C - C000073856CClass Institutional - C000073858InstitutionalClass R6 - C000146686R6Class R - C000122153RClass Y - C000073859YClass A - C000017277AClass C - C000017279CClass Institutional - C000045545InstitutionalClass R6 - C000146680R6Class R - C000122149RClass Y - C000017280YClass A - C000073860AClass C - C000073863CClass Institutional - C000073865InstitutionalClass R6 - C000146687R6Class R - C000122154RClass Y - C000073861YClass A - C000073961AClass C - C000073958CClass Institutional - C000073960InstitutionalClass R6 - C000146700R6Class R - C000122166RClass Y - C000073956YClass A - C000017290AClass C - C000017292CClass Institutional - C000045547InstitutionalClass R6 - C000146682R6Class R - C000017289RClass Y - C000017293YClass A - C000017299AClass C - C000017301CClass Institutional - C000045549InstitutionalClass R6 - C000146684R6Class R - C000017298RClass Y - C000017302YClass A - C000146475AClass C - C000146476CClass Institutional - C000146478InstitutionalClass R6 - C000146481R6Class R - C000146479RClass Y - C000146480YClass A - C000073903AClass C - C000073905CClass Institutional - C000073907InstitutionalClass R6 - C000146691R6Class R - C000122159RClass Y - C000073902YClass A - C000017269AClass C - C000017271CClass Institutional - C000045543InstitutionalClass R6 - C000146679R6Class R - C000017268RClass Y - C000017272YClass A - C000073890AClass C - C000073892CClass Institutional - C000073894InstitutionalClass R6 - C000146689R6Class R - C000122158RClass Y - C000073889YClass A - C000030961AClass C - C000030963CClass Institutional - C000045550InstitutionalClass R6 - C000146685R6Class R - C000122152RClass Y - C000030964YClass A - C000073949AClass C - C000073944CClass Institutional - C000073946InstitutionalClass R6 - C000146698R6Class R - C000073947RClass Y - C000073948YClass A - C000073896AClass C - C000073898CClass Institutional - C000073900InstitutionalClass R6 - C000146690R6Class R - C000073901RClass Y - C000073895YClass A - C000017264AClass C - C000017266CClass Institutional - C000045542InstitutionalClass R6 - C000146678R6Class R - C000017263RClass Y - C000017267YClass A - C000073942AClass C - C000073939CClass Institutional - C000073940InstitutionalClass R6 - C000146697R6Class R - C000122165RClass Y - C000073941YClass A - C000017281AClass C - C000017283CClass Institutional - C000045546InstitutionalClass R6 - C000146681R6Class R - C000122150RClass Y - C000017284YMarket Risk [Member]Market Risk [Member]Foreign and Emerging Markets Risk [Member]Foreign and Emerging Markets Risk [Member]Exchange-traded fund risk [Member]Exchange-traded fund risk [Member]Commodity-related investments risk [Member]Commodity-related investments risk [Member]Credit risk [Member]Credit risk [Member]High Yield (Junk) Bond Risk [Member]High Yield (Junk) Bond Risk [Member]Loans and Other Direct Indebtedness Risk [Member]Loans and Other Direct Indebtedness Risk [Member]Liquidity Risk [Member]Liquidity Risk [Member]Interest rate risk [Member]Interest rate risk [Member]Mortgage-Backed and Asset-Backed Securities Risk [Member]Mortgage-Backed and Asset-Backed Securities Risk [Member]Industry and sector riskIndustry and sector riskUS Government Securities Risk [Member]US Government Securities Risk [Member]Derivatives Risk [Member]Derivatives Risk [Member]Subsidiary riskSubsidiary riskActive management and selection risk [Member]Active management and selection risk [Member]MSCI ACWI (All Country World Index) (net) (reflects no deduction for fees or expenses)MSCI ACWI (All Country World Index) (net) (reflects no deduction for fees or expenses)MSCI ACWI (All Country World Index) (gross) (reflects no deduction for fees, expenses, or taxes)MSCI ACWI (All Country World Index) (gross) (reflects no deduction for fees, expenses, or taxes)Preferred stock risk [Member]Preferred stock risk [Member]REIT-related risk [Member]REIT-related risk [Member]Company size risk [Member]Company size risk [Member]Foreign RiskForeign RiskActive Managment and Selection RiskActive Managment and Selection RiskS&P 500 Index (reflects no deduction for fees, expenses, or taxes)S&P 500 Index (reflects no deduction for fees, expenses, or taxes)Bloomberg US Aggregate Index (reflects no deduction for fees, expenses, or taxes)Bloomberg US Aggregate Index (reflects no deduction for fees, expenses, or taxes)Large-capitalization company risk [Member]Large-capitalization company risk [Member]Growth stock risk [Member]Growth stock risk [Member]Value stock risk [Member]Value stock risk [Member]Information technology sector risk [Member]Information technology sector risk [Member]Limited number of securities risk [Member]Limited number of securities risk [Member]Currency risk [Member]Currency risk [Member]Geographic Focus RiskGeographic Focus RiskMSCI ACWI (All Country World Index) ex USA (net) (reflects no deduction for fees or expenses)MSCI ACWI (All Country World Index) ex USA (net) (reflects no deduction for fees or expenses)MSCI ACWI (All Country World Index) ex USA (gross) (reflects no deduction for fees, expenses, or taxes)MSCI ACWI (All Country World Index) ex USA (gross) (reflects no deduction for fees, expenses, or taxes)Industry and security risks [Member]Industry and security risks [Member]Government and regulatory risks [Member]Government and regulatory risks [Member]Russell 1000 Index (reflects no deduction for fees, expenses or taxes)Russell 1000 Index (reflects no deduction for fees, expenses or taxes)Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)Market risk_Market risk_Industrials sector risk [Member]Industrials sector risk [Member]Healthcare sector risk [Member]Healthcare sector risk [Member]Liquidity risk_[Member]Liquidity risk_[Member]Russell 3000 Index (reflects no deduction for fees, expenses or taxes)Russell 3000 Index (reflects no deduction for fees, expenses or taxes)Russell Midcap Growth Index (reflects no deduction for fees, expenses, or taxes)Russell Midcap Growth Index (reflects no deduction for fees, expenses, or taxes)Divident paying stock riskDivident paying stock riskRussell Midcap Index (reflects no deduction for fees, expenses, or taxes)Russell Midcap Index (reflects no deduction for fees, expenses, or taxes)Russell 2500 Index (reflects no deduction for fees, expenses, or taxes)Russell 2500 Index (reflects no deduction for fees, expenses, or taxes)Initial public offering (IPO) risk [Member]Initial public offering (IPO) risk [Member]Russell 3000 Index (reflects no deduction for fees, expenses, or taxes)Russell 3000 Index (reflects no deduction for fees, expenses, or taxes)Russell 2000 Growth Index (reflects no deduction for fees, expenses, or taxes)Russell 2000 Growth Index (reflects no deduction for fees, expenses, or taxes)Capital repatriation risk [Member]Capital repatriation risk [Member]Currency RiskCurrency RiskChina investment risk [Member]China investment risk [Member]MSCI Emerging Markets Index (net) (reflects no deduction for fees or expenses)MSCI Emerging Markets Index (net) (reflects no deduction for fees or expenses)MSCI Emerging Markets Index (gross) (reflects no deduction for fees, expenses, or taxes)MSCI Emerging Markets Index (gross) (reflects no deduction for fees, expenses, or taxes)Climate change investment focus riskClimate change investment focus riskESG screening riskESG screening riskConcentration riskConcentration riskForeign currency exchange transactions and forward foreign currency contracts risk [Member]Foreign currency exchange transactions and forward foreign currency contracts risk [Member]Government and Regulatory Risk [Member]Government and Regulatory Risk [Member]MSCI ACWI Investable Market Index (net) (reflects no deduction for fees or expenses)MSCI ACWI Investable Market Index (net) (reflects no deduction for fees or expenses)MSCI ACWI Investable Market Index (gross) (reflects no deduction for fees, expenses, or taxes)MSCI ACWI Investable Market Index (gross) (reflects no deduction for fees, expenses, or taxes)Natural resources industry riskNatural resources industry riskEnergy sector risk [Member]Energy sector risk [Member]S&P Global Natural Resources Index (net) (reflects no deduction for fees or expenses)S&P Global Natural Resources Index (net) (reflects no deduction for fees or expenses)Real estate industry risk [Member]Real estate industry risk [Member]Real assets industries risk [Member]Real assets industries risk [Member]REOC-related riskREOC-related riskFTSE Nareit Equity REITs Index (reflects no deduction for fees, expenses or taxes)FTSE Nareit Equity REITs Index (reflects no deduction for fees, expenses or taxes)Science and technology industry riskScience and technology industry riskS&P North American Technology Sector Index (reflects no deduction for fees, expenses, or taxes)S&P North American Technology Sector Index (reflects no deduction for fees, expenses, or taxes)Prepayment Risk [Member]Prepayment Risk [Member]Portfolio Turnover Risk [Member]Portfolio Turnover Risk [Member]Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses or taxes)Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses or taxes)Bloomberg Global Aggregate Index, Hedged to USD (reflects no deduction for fees, expenses or taxes)Bloomberg Global Aggregate Index, Hedged to USD (reflects no deduction for fees, expenses or taxes)Distressed securities risk [Member]Distressed securities risk [Member]New issue risk [Member]New issue risk [Member]Payment-in-kind securities risk [Member]Payment-in-kind securities risk [Member]Deferred payment securities risk [Member]Deferred payment securities risk [Member]Restricted securities risk [Member]Restricted securities risk [Member]ICE BofA US High Yield Constrained Index (reflects no deduction for fees, expenses, or taxes)ICE BofA US High Yield Constrained Index (reflects no deduction for fees, expenses, or taxes)