v3.26.1
Fees and Expenses - Nomura Ultrashort Fund - Nomura Ultrashort Fund
Mar. 31, 2026
Prospectus [Line Items]  
Expense Heading [Optional Text] What are the Fund’s fees and expenses?
Expense Narrative [Text Block]
The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Operating Expenses Caption [Optional Text] Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Class
Inst.
Management fees.................................................................................
0.30%
Distribution and service (12b-1) fees....................................................................
none
Other expenses..................................................................................
0.26%
Total annual fund operating expenses..................................................................
0.56%
Fee waivers and expense reimbursements...............................................................
(0.21%)1
Total annual fund operating expenses after fee waivers and expense reimbursements................................
0.35%
[1]
Expense Example [Heading] Example
Expense Example Narrative [Text Block]
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. 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:
Expense Example, With Redemption [Table]
Class
Inst.
1 year............................................................................................
$36
3 years...........................................................................................
$158
5 years...........................................................................................
$292
10 years..........................................................................................
$681
Portfolio Turnover [Heading] Portfolio turnover
Portfolio Turnover [Text Block]
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 72% of the average value of its portfolio.
Portfolio Turnover, Rate 72.00%
[1]
1 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 0.35% of the Fund’s average daily net assets from July 31, 2026 through July 30, 2027. These waivers and reimbursements may only be terminated by agreement of the Manager and the Fund.