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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Central Index Key dei_EntityCentralIndexKey 0000910682
Delaware Global Real Estate Opportunities Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading Delaware Global Real Estate Opportunities Fund
Investment Objective, Heading rr_ObjectiveHeading What is the Fund’s investment objective?
Investment Objective, Primary rr_ObjectivePrimaryTextBlock

Delaware Global Real Estate Opportunities Fund seeks maximum long-term total return through a combination of current income and capital appreciation.
Expense, Heading rr_ExpenseHeading What are the Fund’s fees and expenses?
Expense, Narrative rr_ExpenseNarrativeTextBlock

The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Delaware Funds® by Macquarie. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
Shareholder Fees, Caption rr_ShareholderFeesCaption Shareholder fees (fees paid directly from your investment)
Operating Expenses, Caption rr_OperatingExpensesCaption Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 187% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 187.00%
Expense Breakpoint, Discounts rr_ExpenseBreakpointDiscounts You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Delaware Funds® by Macquarie. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
Expense Breakpoint, Minimum Investment Required Amount rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example, Heading rr_ExpenseExampleHeading Example
Expense Example, Narrative rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year and reflects the Manager’s expense waivers and reimbursements for the 1-year contractual period and the total operating expenses without waivers for years 2 through 10. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading rr_StrategyHeading What are the Fund’s principal investment strategies?
Investment Strategy, Narrative rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in US and non-US real estate and real estate-related issuers (80% policy). The Fund generally considers an issuer to be a real estate or real estate-related issuer if at least 50% of its revenue is from real estate or if it has at least 50% of its assets in real estate. These companies include, among others, real estate investment trusts (REITs) and similar REIT-like entities domiciled outside the US, as well as other companies whose products and services are related to the real estate industry, such as manufacturers and distributors of building supplies and financial institutions that issue or service mortgages.

The Fund invests primarily in REITs and other equity securities. REITs are pooled investment vehicles that invest primarily in income-producing real estate or real estate-related loans or interests.

The Fund may invest in companies across all market capitalizations and may invest its assets in securities of companies located in emerging market countries. Under normal circumstances, the Fund will invest at least 40% of its total assets in securities of non-US issuers, unless market conditions are not deemed favorable by the Manager, in which case the Fund would invest at least 30% of its net assets in securities of non-US issuers.

The Fund may purchase or sell foreign currencies and/or engage in forward foreign currency contracts in order to facilitate or expedite settlement of portfolio transactions and to minimize currency fluctuations. The Fund may also enter into forward contracts to “lock in” the price of a security it has agreed to purchase or sell, in terms of US dollars or other currencies in which the transaction will be consummated.

The Fund’s 80% policy is nonfundamental and may be changed without shareholder approval. Fund shareholders would be given at least 60 days’ notice prior to any such change.
Strategy Portfolio Concentration rr_StrategyPortfolioConcentration Under normal circumstances, the Fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in US and non-US real estate and real estate-related issuers (80% policy).
Risk, Heading rr_RiskHeading What are the principal risks of investing in the Fund?
Risk, Narrative rr_RiskNarrativeTextBlock

Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund’s portfolio. The Fund’s principal risks include:

Market risk — The risk that all or a majority of the securities in a certain market — such as the stock or bond market — will decline in value because of factors such as adverse political or economic conditions, future expectations, investor confidence, or heavy institutional selling.

Real estate industry risk — This risk includes, among others: possible declines in the value of real estate; risks related to general and local economic conditions; possible lack of availability of mortgage funds; overbuilding; extended vacancies of properties; increases in competition, property taxes, and operating expenses; changes in zoning laws; costs resulting from the cleanup of, and liability to third parties resulting from, environmental problems; casualty for condemnation losses; uninsured damages from floods, earthquakes, or other natural disasters; limitations on and variations in rents; and changes in interest rates.

Foreign risk — The risk that foreign securities (particularly in emerging markets) may be adversely affected by political instability, changes in currency exchange rates, inefficient markets and higher transaction costs, foreign economic conditions, the imposition of economic or trade sanctions, or inadequate or different regulatory and accounting standards.

Derivatives risk — Derivatives contracts, such as futures, forward foreign currency contracts, options, and swaps, may involve additional expenses (such as the payment of premiums) and are subject to significant loss if a security, index, reference rate, or other asset or market factor to which a derivatives contract is associated, moves in the opposite direction from what the portfolio manager anticipated. When used for hedging, the change in value of the derivatives instrument may also not correlate specifically with the currency, rate, or other risk being hedged, in which case a fund may not realize the intended benefits. Derivatives contracts are also subject to the risk that the counterparty may fail to perform its obligations under the contract due to, among other reasons, financial difficulties (such as a bankruptcy or reorganization).

Company size risk — The risk that investments in small- and/or medium-sized companies may be more volatile than those of larger companies because of limited financial resources or dependence on narrow product lines.

Nondiversification risk — A nondiversified fund has the flexibility to invest as much as 50% of its assets in as few as two issuers with no single issuer accounting for more than 25% of the fund. The remaining 50% of its assets must be diversified so that no more than 5% of its assets are invested in the securities of a single issuer. Because a nondiversified fund may invest its assets in fewer issuers, the value of its shares may increase or decrease more rapidly than if it were fully diversified.

Interest rate risk — The risk that securities will decrease in value if interest rates rise. The risk is generally associated with bonds; however, because small- and medium-sized companies and companies in the real estate sector often borrow money to finance their operations, they may be adversely affected by rising interest rates. A fund may be subject to a greater risk of rising interest rates due to the current period of historically low interest rates.

Liquidity risk — The possibility that investments cannot be readily sold within seven calendar days at approximately the price at which a fund has valued them.

Government and regulatory risk — The risk that governments or regulatory authorities may take actions that could adversely affect various sectors of the securities markets and affect fund performance.

Active management and selection risk — The risk that the securities selected by a fund’s management will underperform the markets, the relevant indices, or the securities selected by other funds with similar investment objectives and investment strategies. The securities and sectors selected may vary from the securities and sectors included in the relevant index.

The Manager is an indirect wholly owned subsidiary of Macquarie Group Limited (MGL). Other than Macquarie Bank Limited (MBL), a subsidiary of MGL and an affiliate of the Manager, none of the entities noted are authorized deposit-taking institutions for the purposes of the Banking Act 1959 (Commonwealth of Australia). The obligations of these entities do not represent deposits or other liabilities of MBL. MBL does not guarantee or otherwise provide assurance in respect of the obligations of these entities, unless noted otherwise. The Fund is governed by US laws and regulations.
Risk, Lose Money rr_RiskLoseMoney Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund’s portfolio.
Risk, Nondiversified Status rr_RiskNondiversifiedStatus Nondiversification risk — A nondiversified fund has the flexibility to invest as much as 50% of its assets in as few as two issuers with no single issuer accounting for more than 25% of the fund. The remaining 50% of its assets must be diversified so that no more than 5% of its assets are invested in the securities of a single issuer. Because a nondiversified fund may invest its assets in fewer issuers, the value of its shares may increase or decrease more rapidly than if it were fully diversified.
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading How has Delaware Global Real Estate Opportunities Fund performed?
Performance, Narrative rr_PerformanceNarrativeTextBlock

The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual total returns for the 1-, 5-, and 10-year or lifetime periods compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. The returns reflect any expense caps in effect during these periods. The returns would be lower without the expense caps. You may obtain the Fund’s most recently available month-end performance by calling 800 523-1918 or by visiting our website at delawarefunds.com/performance.

The Fund is the successor to The Global Real Estate Securities Portfolio, formerly a series of the Delaware Pooled® Trust, pursuant to the reorganization (Reorganization) of The Global Real Estate Securities Portfolio, which occurred on Sept. 28, 2012. Prior to the Reorganization, the Fund had no investment operations. Accordingly, the performance information shown below for periods prior to Sept. 28, 2012 is historical information for The Global Real Estate Securities Portfolio, which has been adjusted to reflect the Fund’s applicable sales charges and 12b-1 fees, but not certain other expenses. Because the Fund’s fees and expenses are higher than those of The Global Real Estate Securities Portfolio, the Fund’s performance would have been lower than that shown below for The Global Real Estate Securities Portfolio.
Performance, Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual total returns for the 1-, 5-, and 10-year or lifetime periods compare with those of a broad measure of market performance.
Performance Availability Phone rr_PerformanceAvailabilityPhone 800 523-1918
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress delawarefunds.com/performance
Performance Past Does Not Indicate Future rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance (before and after taxes) is not necessarily an indication of how it will perform in the future.
Bar Chart Heading rr_BarChartHeading Calendar year-by-year total return (Class A)
Bar Chart, Closing rr_BarChartClosingTextBlock

During the periods illustrated in this bar chart, Class A’s highest quarterly return was 31.78% for the quarter ended June 30, 2009, and its lowest quarterly return was -21.32% for the quarter ended March 31, 2009. The maximum Class A sales charge of 5.75%, which is normally deducted when you purchase shares, is not reflected in the highest/lowest quarterly returns or in the bar chart. If this fee were included, the returns would be less than those shown. The average annual total returns in the table below do include the sales charge.
Performance Table Heading rr_PerformanceTableHeading Average annual total returns for periods ended December 31, 2018
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred After-tax returns are not relevant for shares held in tax-advantaged investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs).
Performance Table One Class of after Tax Shown rr_PerformanceTableOneClassOfAfterTaxShown After-tax performance is presented only for Class A shares of the Fund.
Performance Table, Closing rr_PerformanceTableClosingTextBlock

After-tax performance is presented only for Class A shares of the Fund. The after-tax returns for other Fund classes may vary. Actual after-tax returns depend on the investor’s individual tax situation and may differ from the returns shown. After-tax returns are not relevant for shares held in tax-advantaged investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs). The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes.
Delaware Global Real Estate Opportunities Fund | FTSE EPRA Nareit Developed Index NR (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects withholding taxes on foreign dividends, but no deduction for fees, expenses, or other taxes)
1 year rr_AverageAnnualReturnYear01 (5.63%) [1]
5 years rr_AverageAnnualReturnYear05 4.34% [1]
10 years rr_AverageAnnualReturnYear10 9.65% [1]
Delaware Global Real Estate Opportunities Fund | FTSE EPRA Nareit Developed Index TR (reflects no deduction for fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses, or taxes)
1 year rr_AverageAnnualReturnYear01 (4.74%) [1]
5 years rr_AverageAnnualReturnYear05 5.26% [1]
10 years rr_AverageAnnualReturnYear10 10.53% [1]
Delaware Global Real Estate Opportunities Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases as a percentage of offering price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.99%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.56%
Total annual fund operating expenses rr_ExpensesOverAssets 1.80%
Fee waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets 0.40% [2]
Total annual fund operating expenses after fee waivers and expense reimbursements rr_NetExpensesOverAssets 1.40%
1 year rr_ExpenseExampleYear01 $ 709
3 years rr_ExpenseExampleYear03 1,072
5 years rr_ExpenseExampleYear05 1,459
10 years rr_ExpenseExampleYear10 $ 2,538
Annual Return 2009 rr_AnnualReturn2009 30.40%
Annual Return 2010 rr_AnnualReturn2010 19.39%
Annual Return 2011 rr_AnnualReturn2011 (4.13%)
Annual Return 2012 rr_AnnualReturn2012 28.87%
Annual Return 2013 rr_AnnualReturn2013 4.36%
Annual Return 2014 rr_AnnualReturn2014 15.74%
Annual Return 2015 rr_AnnualReturn2015 (0.29%)
Annual Return 2016 rr_AnnualReturn2016 3.76%
Annual Return 2017 rr_AnnualReturn2017 8.65%
Annual Return 2018 rr_AnnualReturn2018 (6.21%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel During the periods illustrated in this bar chart, Class A’s highest quarterly return was
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 31.78%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return was
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2009
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.32%)
1 year rr_AverageAnnualReturnYear01 (11.64%)
5 years rr_AverageAnnualReturnYear05 2.82%
10 years rr_AverageAnnualReturnYear10 8.72%
Delaware Global Real Estate Opportunities Fund | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (12.47%)
5 years rr_AverageAnnualReturnYear05 2.04%
10 years rr_AverageAnnualReturnYear10 7.33%
Delaware Global Real Estate Opportunities Fund | Class A | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (6.80%)
5 years rr_AverageAnnualReturnYear05 1.86%
10 years rr_AverageAnnualReturnYear10 6.43%
Delaware Global Real Estate Opportunities Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases as a percentage of offering price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [3]
Management fees rr_ManagementFeesOverAssets 0.99%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.56%
Total annual fund operating expenses rr_ExpensesOverAssets 2.55%
Fee waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets 0.40% [2]
Total annual fund operating expenses after fee waivers and expense reimbursements rr_NetExpensesOverAssets 2.15%
1 year rr_ExpenseExampleYear01 $ 318
3 years rr_ExpenseExampleYear03 756
5 years rr_ExpenseExampleYear05 1,320
10 years rr_ExpenseExampleYear10 2,855
1 year rr_ExpenseExampleNoRedemptionYear01 218
3 years rr_ExpenseExampleNoRedemptionYear03 756
5 years rr_ExpenseExampleNoRedemptionYear05 1,320
10 years rr_ExpenseExampleNoRedemptionYear10 $ 2,855
1 year rr_AverageAnnualReturnYear01 (7.88%)
5 years rr_AverageAnnualReturnYear05 3.30%
lifetime rr_AverageAnnualReturnSinceInception 4.34%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 28, 2012
Delaware Global Real Estate Opportunities Fund | Class R  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases as a percentage of offering price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.99%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.56%
Total annual fund operating expenses rr_ExpensesOverAssets 2.05%
Fee waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets 0.40% [2]
Total annual fund operating expenses after fee waivers and expense reimbursements rr_NetExpensesOverAssets 1.65%
1 year rr_ExpenseExampleYear01 $ 168
3 years rr_ExpenseExampleYear03 604
5 years rr_ExpenseExampleYear05 1,067
10 years rr_ExpenseExampleYear10 $ 2,347
1 year rr_AverageAnnualReturnYear01 (6.50%)
5 years rr_AverageAnnualReturnYear05 3.82%
lifetime rr_AverageAnnualReturnSinceInception 4.86%
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 28, 2012
Delaware Global Real Estate Opportunities Fund | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases as a percentage of offering price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.99%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.56%
Total annual fund operating expenses rr_ExpensesOverAssets 1.55%
Fee waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets 0.40% [2]
Total annual fund operating expenses after fee waivers and expense reimbursements rr_NetExpensesOverAssets 1.15%
1 year rr_ExpenseExampleYear01 $ 117
3 years rr_ExpenseExampleYear03 450
5 years rr_ExpenseExampleYear05 807
10 years rr_ExpenseExampleYear10 $ 1,812
1 year rr_AverageAnnualReturnYear01 (6.07%)
5 years rr_AverageAnnualReturnYear05 4.33%
10 years rr_AverageAnnualReturnYear10 9.63%
[1] The Fund's new benchmark, the "NR" or "net return" version of the FTSE EPRA Nareit Developed Index, reflects withholding taxes on foreign dividends, with no deduction for fees, expenses, or other taxes, while the Fund's previous benchmark, the "TR" or "total return" version of the FTSE EPRA Nareit Developed Index, reflects no deduction for fees, expenses, or other taxes. The Fund's portfolio managers believe that the NR version of the FTSE EPRA Nareit Developed Index is a more accurate benchmark for the Fund's investments.
[2] The Fund's investment manager, Delaware Management Company (Manager), has contractually agreed to waive all or a portion of its investment advisory fees and/or pay/reimburse expenses (excluding any 12b-1 fees, acquired fund fees and expenses, taxes, interest, short sale dividend and interest expenses, brokerage fees, certain insurance costs, and nonroutine expenses or costs, including, but not limited to, those relating to reorganizations, litigation, conducting shareholder meetings, and liquidations) in order to prevent total annual fund operating expenses from exceeding 1.15% of the Fund's average daily net assets from Feb. 28, 2019 through Feb. 28, 2020. These waivers and reimbursements may only be terminated by agreement of the Manager and the Fund.
[3] Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC).