Expense Example, No Redemption: Thirty Day Yield Phone Average Annual Return, Column Name Performance Table One Class of after Tax Shown Bar Chart, Year to Date Return Annual Return 2010 Annual Return 2002 Annual Return 1991 Expense Exchange Traded Fund Commissions Distribution or Similar (Non 12b-1) Fees Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower Prospectus Date Russell 2000® Represents the Russell 2000®, during the indicated time period. Prospectus #1 Represents the Prospectus #1, during the indicated time period. Thirty Day Tax Equivalent Yield Annual Return 2021 2012 Bar Chart Narrative Performance Past Does Not Indicate Future Expense Example Footnotes Expense Example, No Redemption, 10 Years Expense Example, No Redemption Narrative Expenses Not Correlated to Ratio Due to Acquired Fund Fees Risk Narrative Expense Narrative Bar Chart Table: Supplement to Prospectus Lowest Quarterly Return, Label Bar Chart Footnotes 2019 Annual Return 2006 Risk Money Market Fund Sponsor May Not Provide Support Risk Money Market Fund Price Fluctuates Expenses Restated to Reflect Current Component3 Other Expenses Redemption Fee Objective, Secondary Performance Table Footnotes Bar Chart Insitutional Class Represents the Insitutional Class, during the indicated time period. Class C Represents the Class C, during the indicated time period. 1 year Highest Quarterly Return, Date Annual Return 2009 Annual Return 1998 Performance Availability Phone Performance Information Illustrates Variability of Returns Risk Nondiversified Status Expense Example, No Redemption, 1 Year Exchange Fee Shareholder Fees Column Performance Narrative Expense Example Risk/Return 60% S&P 500® Index / 40% Bloomberg Barclays US Aggregate Index Represents the 60% S&P 500® Index / 40% Bloomberg Barclays US Aggregate Index, during the indicated time period. Class R6 {1} Class R6 Represents the Class R6, during the indicated time period. Period end date Thirty Day Yield Caption Annual Return 2025 Annual Return 2008 Annual Return 1990 Expense Example by, Year, Caption Expenses Deferred Charges Component2 Other Expenses Shareholder Fee, Other Annual Fund Operating Expenses Prospectus [Line Items] Class R {1} Class R Represents the Class R, during the indicated time period. Amendment Flag Registrant Name Label Performance Table Not Relevant to Tax Deferred Performance Table Does Reflect Sales Loads Highest Quarterly Return Bar Chart, Reason Selected Class Different from Immediately Preceding Period Annual Return 1997 Expense Example, No Redemption, By Year, Caption Portfolio Turnover, Rate Total annual fund operating expenses Redemption Fee (as a percentage of Amount Redeemed) Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Strategy Narrative Portfolio Turnover Shareholder Fees Class C {2} Class C Represents the Class C, during the indicated time period. Performance Table Market Index Changed Performance Table Heading 2015 Bar Chart Does Not Reflect Sales Loads Bar Chart {1} Bar Chart Risk Money Market Fund May Impose Fees or Suspend Sales Expense Example, No Redemption, 5 Years Expense Example, with Redemption, 3 Years Expenses Explanation of Nonrecurring Account Fee Expense Breakpoint Discounts Portfolio Turnover {1} Portfolio Turnover Objective, Primary Delaware Small Cap Core Fund Represents the Delaware Small Cap Core Fund, during the indicated time period. Amendment Description Performance Table Explanation after Tax Higher Year to Date Return, Label Expense Example, with Redemption, 10 Years Other Expenses, New Fund, Based on Estimates Management fees Maximum Cumulative Sales Charge (as a percentage of Offering Price) Performance Table Closing Bar Chart Closing Performance Measure [Axis] Prospectus #2 Represents the Prospectus #2, during the indicated time period. 10 years or lifetime 2017 2016 Annual Return, Column Performance Availability Website Address Risk Caption Risk Lose Money Expense Example, with Redemption, 5 Years Expense Example by Year Expense Example, With Redemption Expense Prospectus #3 Represents the Prospectus #3, during the indicated time period. Document Information, Document [Axis] Average Annual Return: Money Market Seven Day Yield 5 years Performance Table Narrative Index No Deduction for Fees, Expenses, Taxes Bar Chart, Returns for Class Not Offered in Prospectus Performance One Year or Less Risk Column Expense Example, with Redemption, 1 Year Expenses Other Expenses Had Extraordinary Expenses Been Included Maximum Deferred Sales Charge (as a percentage) Expense Example, No Redemption Class R {2} Class R Represents the Class R, during the indicated time period. Institutional Class {1} Institutional Class Represents the Institutional Class, during the indicated time period. Coregistrant Prospectus: Thirty Day Yield Money Market Seven Day Tax Equivalent Yield Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period Annual Return 2022 2013 Annual Return 2004 Annual Return 1994 Risk Footnotes Strategy Portfolio Concentration Expense Footnotes Fee waivers and expense reimbursements Maximum sales charge (load) imposed on purchases as a percentage of offering price After Taxes on Distributions and Sales Class R Represents the Class R, during the indicated time period. Share Classes Entity Investment Company Type Lifetime Performance Table Uses Highest Federal Rate Lowest Quarterly Return 2014 Annual Return 2003 Annual Return Caption Risk {1} Risk Acquired Fund Fees and Expenses, Based on Estimates Fee Waiver or Reimbursement over Assets, Date of Termination Acquired Fund Fees and Expenses Dividends on short sales and interest expenses Document Creation Date Objective Delaware Small Cap Value Fund Represents the Delaware Small Cap Value Fund, during the indicated time period. Coregistrant [Axis] Registrant CIK Operating Expenses: Thirty Day Yield Column Lowest Quarterly Return, Date Bar Chart, Year to Date Return, Date Annual Return 2000 Annual Return, Inception Date Risk Not Insured Depository Institution Total annual fund operating expenses after fee waivers and expense reimbursements Distribution and service (12b-1) fees Maximum Cumulative Sales Charge (as a percentage) Strategy Class A Represents the Class A, during the indicated time period. Average Annual Return, Caption 2020 2018 Annual Return 2005 Annual Return 1999 Risk Money Market Fund May Not Preserve Dollar Expense Example, No Redemption, 3 Years Expense Breakpoint, Minimum Investment Required Maximum Account Fee (as a percentage of Assets) Performance Russell 2000® Value Index Represents the Russell 2000® Value Index, during the indicated time period. Risk/Return: