Average Annual Total Returns |
Prospectus #1
Delaware Corporate Bond Fund
Bloomberg US Aggregate Bond Index
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Bloomberg US Aggregate Bond Index
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Bloomberg US Aggregate Bond Index
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Bloomberg US Corporate Bond Index
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Bloomberg US Corporate Bond Index
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Bloomberg US Corporate Bond Index
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
After Taxes on Distributions
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
After Taxes on Distributions
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
After Taxes on Distributions
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
After Taxes on Distributions and Sales
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
After Taxes on Distributions and Sales
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class A
After Taxes on Distributions and Sales
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class C
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Class C
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class C
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class R
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Class R
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class R
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Institutional Class
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Institutional Class
5 years
|
Prospectus #1
Delaware Corporate Bond Fund
Institutional Class
10 years
|
Prospectus #1
Delaware Corporate Bond Fund
Class R6
1 year
|
Prospectus #1
Delaware Corporate Bond Fund
Class R6
Lifetime
|
Prospectus #1
Delaware Corporate Bond Fund
Class R6
Inception Date
|
Prospectus #1
Delaware Extended Duration Bond Fund
Bloomberg US Aggregate Bond Index
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Bloomberg US Aggregate Bond Index
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Bloomberg US Aggregate Bond Index
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Bloomberg Long US Corporate Index
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Bloomberg Long US Corporate Index
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Bloomberg Long US Corporate Index
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
After Taxes on Distributions
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
After Taxes on Distributions
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
After Taxes on Distributions
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
After Taxes on Distributions and Sales
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
After Taxes on Distributions and Sales
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class A
After Taxes on Distributions and Sales
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class C
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class C
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class C
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Institutional Class
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Institutional Class
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Institutional Class
10 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R6
1 year
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R6
5 years
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R6
Lifetime
|
Prospectus #1
Delaware Extended Duration Bond Fund
Class R6
Inception Date
|
Prospectus #2
Delaware Floating Rate Fund
Bloomberg US Aggregate Bond Index
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Bloomberg US Aggregate Bond Index
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Bloomberg US Aggregate Bond Index
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Morningstar LSTA US Leveraged Loan Index
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Morningstar LSTA US Leveraged Loan Index
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Morningstar LSTA US Leveraged Loan Index
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Class A
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Class A
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Class A
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Class A
After Taxes on Distributions
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Class A
After Taxes on Distributions
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Class A
After Taxes on Distributions
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Class A
After Taxes on Distributions and Sales
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Class A
After Taxes on Distributions and Sales
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Class A
After Taxes on Distributions and Sales
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Class C
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Class C
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Class C
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Class R
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Class R
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Class R
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Institutional Class
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Institutional Class
5 years
|
Prospectus #2
Delaware Floating Rate Fund
Institutional Class
10 years
|
Prospectus #2
Delaware Floating Rate Fund
Class R6
1 year
|
Prospectus #2
Delaware Floating Rate Fund
Class R6
Lifetime
|
Prospectus #2
Delaware Floating Rate Fund
Class R6
Inception Date
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | 5.53% | 1.10% | 1.81% | 8.52% | 2.63% | 2.95% | 2.35% | 1.65% | 2.13% | 0.70% | 0.16% | 0.55% | 1.34% | 0.67% | 0.95% | 5.47% | 1.85% | 1.83% | 6.99% | 2.37% | 2.33% | 7.46% | 2.86% | 2.85% | 7.56% | 2.38% | Jan. 31, 2019 | 5.53% | 1.10% | 1.81% | 10.93% | 2.86% | 3.91% | 4.41% | 1.30% | 2.66% | 2.62% | (0.90%) | 0.60% | 2.55% | 0.38% | 1.33% | 7.63% | 1.46% | 2.36% | 9.16% | 1.98% | 2.88% | 9.64% | 2.49% | 3.39% | 9.82% | 2.56% | 2.24% | May 02, 2016 | 5.53% | 1.10% | 1.81% | 13.32% | 5.80% | 4.42% | 9.02% | 4.86% | 3.13% | 5.30% | 2.68% | 1.48% | 5.22% | 2.76% | 1.65% | 10.26% | 4.67% | 2.64% | 11.81% | 5.19% | 3.15% | 12.37% | 5.72% | 3.67% | 12.44% | 5.64% | Aug. 31, 2021 |