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Expense Example, No Redemption - Class C
Prospectus #1
Delaware Corporate Bond Fund
Expense Example, No Redemption, 1 Year
Prospectus #1
Delaware Corporate Bond Fund
Expense Example, No Redemption, 3 Years
Prospectus #1
Delaware Corporate Bond Fund
Expense Example, No Redemption, 5 Years
Prospectus #1
Delaware Corporate Bond Fund
Expense Example, No Redemption, 10 Years
Prospectus #1
Delaware Extended Duration Bond Fund
Expense Example, No Redemption, 1 Year
Prospectus #1
Delaware Extended Duration Bond Fund
Expense Example, No Redemption, 3 Years
Prospectus #1
Delaware Extended Duration Bond Fund
Expense Example, No Redemption, 5 Years
Prospectus #1
Delaware Extended Duration Bond Fund
Expense Example, No Redemption, 10 Years
Prospectus #2
Delaware Floating Rate Fund
Expense Example, No Redemption, 1 Year
Prospectus #2
Delaware Floating Rate Fund
Expense Example, No Redemption, 3 Years
Prospectus #2
Delaware Floating Rate Fund
Expense Example, No Redemption, 5 Years
Prospectus #2
Delaware Floating Rate Fund
Expense Example, No Redemption, 10 Years
Prospectus #3
Delaware High-Yield Opportunities Fund
Expense Example, No Redemption, 1 Year
Prospectus #3
Delaware High-Yield Opportunities Fund
Expense Example, No Redemption, 3 Years
Prospectus #3
Delaware High-Yield Opportunities Fund
Expense Example, No Redemption, 5 Years
Prospectus #3
Delaware High-Yield Opportunities Fund
Expense Example, No Redemption, 10 Years
USD ($) 160 515 894 1,958 160 525 915 2,008 172 556 965 2,107 172 579 1,011 2,215