| Form N-CSR Cover | 12 Months Ended |
| Jul. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | DELAWARE GROUP GOVERNMENT FUND |
| Entity Central Index Key | 0000769220 |
| Document Period End Date | Jul. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Jul. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | DELAWARE GROUP GOVERNMENT FUND |
| Entity Central Index Key | 0000769220 |
| Document Period End Date | Jul. 31, 2024 |
| C000130079 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Emerging Markets Debt Corporate Fund |
| Class Name | Class A |
| Trading Symbol | DEDAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Emerging Markets Debt Corporate Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 1.04 % |
| Expenses Paid, Amount | $ 109 |
| Expense Ratio, Percent | 1.04% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Emerging Markets Debt Corporate Fund (Class A) returned 9.07% (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance relative to the secondary benchmark: Overweight to high yield emerging market bonds in a constructive risk backdrop Out-of-benchmark position in restructured equity of Grupo Aeroméxico SAB de CV Tactical allocation to cash and hedges in a volatile rate backdrop At the sector level, transportation, consumer, and quasi-sovereigns From a country perspective, Mexico, Brazil, and the US Top detractors from performance relative to the secondary benchmark: Underweight to investment grade emerging market bonds in a constructive risk backdrop Underweight to non-rated emerging markets bonds in a constructive risk backdrop Idiosyncratic underperformance of Colombian gas company Canacol Energy Ltd. bonds on operational challenges At the sector level, financials, real estate, and metals and mining From a country perspective, China, Colombia, and Singapore |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Emerging Markets Debt Corporate Fund (Class A) – including sales charge 4.16 % 1.21 % 2.84 % Delaware Emerging Markets Debt Corporate Fund (Class A) – excluding sales charge 9.07 % 2.15 % 3.32 % Bloomberg Global Aggregate Index 6.18 % 0.47 % 2.19 % J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified 9.87 % 2.35 % 3.68 % |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | In connection with new regulatory requirements, effective the date of this report, the Fund changed its broad-based securities market benchmark index to the Bloomberg Global Aggregate Index. |
| Prior Market Index Comparison [Text Block] | Although the Bloomberg Global Aggregate Index can be considered broadly representative of the overall securities market applicable to the Fund, the Fund will continue to show the performance of the J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified for comparative purposes because the Delaware Management Company, the Fund's manager, believes it is more representative of the Fund’s investment universe. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 90,680,785 |
| Holdings Count | Holding | 154 |
| Advisory Fees Paid, Amount | $ 550,729 |
| Investment Company Portfolio Turnover | 94% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Country allocation Brazil 8.08 % Mexico 7.67 % Chile 6.04 % Türkiye 5.24 % Indonesia 4.94 % Hong Kong 4.41 % Peru 3.88 % Colombia 3.54 % Argentina 3.28 % India 3.27 % Sector allocation Financials 25.37% Oil & Gas 13.84% Utilities 13.66% Consumer 10.52% Technology, Media and Telecommunication 8.63% Industrial 7.94% Metals & Mining 4.49% Transport 3.56% Infrastructure 2.72% Real Estate 2.41% |
| C000130080 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Emerging Markets Debt Corporate Fund |
| Class Name | Class C |
| Trading Symbol | DEDCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Emerging Markets Debt Corporate Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $ 1.79 % |
| Expenses Paid, Amount | $ 186 |
| Expense Ratio, Percent | 1.79% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Emerging Markets Debt Corporate Fund (Class C) returned 8.19% (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance relative to the secondary benchmark: Overweight to high yield emerging market bonds in a constructive risk backdrop Out-of-benchmark position in restructured equity of Grupo Aeroméxico SAB de CV Tactical allocation to cash and hedges in a volatile rate backdrop At the sector level, transportation, consumer, and quasi-sovereigns From a country perspective, Mexico, Brazil, and the US Top detractors from performance relative to the secondary benchmark: Underweight to investment grade emerging market bonds in a constructive risk backdrop Underweight to non-rated emerging markets bonds in a constructive risk backdrop Idiosyncratic underperformance of Colombian gas company Canacol Energy Ltd. bonds on operational challenges At the sector level, financials, real estate, and metals and mining From a country perspective, China, Colombia, and Singapore |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Emerging Markets Debt Corporate Fund (Class C) – including sales charge 7.19 % 1.39 % 2.74 % Delaware Emerging Markets Debt Corporate Fund (Class C) – excluding sales charge 8.19 % 1.39 % 2.74 % Bloomberg Global Aggregate Index 6.18 % 0.47 % 2.19 % J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified 9.87 % 2.35 % 3.68 % |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | In connection with new regulatory requirements, effective the date of this report, the Fund changed its broad-based securities market benchmark index to the Bloomberg Global Aggregate Index. |
| Prior Market Index Comparison [Text Block] | Although the Bloomberg Global Aggregate Index can be considered broadly representative of the overall securities market applicable to the Fund, the Fund will continue to show the performance of the J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified for comparative purposes because the Delaware Management Company, the Fund's manager, believes it is more representative of the Fund’s investment universe. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 90,680,785 |
| Holdings Count | Holding | 154 |
| Advisory Fees Paid, Amount | $ 550,729 |
| Investment Company Portfolio Turnover | 94% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Country allocation Brazil 8.08 % Mexico 7.67 % Chile 6.04 % Türkiye 5.24 % Indonesia 4.94 % Hong Kong 4.41 % Peru 3.88 % Colombia 3.54 % Argentina 3.28 % India 3.27 % Sector allocation Financials 25.37 % Oil & Gas 13.84 % Utilities 13.66 % Consumer 10.52 % Technology, Media and Telecommunication 8.63 % Industrial 7.94 % Metals & Mining 4.49 % Transport 3.56 % Infrastructure 2.72 % Real Estate 2.41 % |
| C000130082 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Emerging Markets Debt Corporate Fund |
| Class Name | Institutional Class |
| Trading Symbol | DEDIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Emerging Markets Debt Corporate Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional Class $ 0.79 % |
| Expenses Paid, Amount | $ 83 |
| Expense Ratio, Percent | 0.79% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Emerging Markets Debt Corporate Fund (Institutional Class) returned 9.48%* (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance relative to the secondary benchmark: Overweight to high yield emerging market bonds in a constructive risk backdrop Out-of-benchmark position in restructured equity of Grupo Aeroméxico SAB de CV Tactical allocation to cash and hedges in a volatile rate backdrop At the sector level, transportation, consumer, and quasi-sovereigns From a country perspective, Mexico, Brazil, and the US Top detractors from performance relative to the secondary benchmark: Underweight to investment grade emerging market bonds in a constructive risk backdrop Underweight to non-rated emerging markets bonds in a constructive risk backdrop Idiosyncratic underperformance of Colombian gas company Canacol Energy Ltd. bonds on operational challenges At the sector level, financials, real estate, and metals and mining From a country perspective, China, Colombia, and Singapore |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Emerging Markets Debt Corporate Fund (Institutional Class) – including sales charge 9.48 % * 2.42 % 3.52 % Delaware Emerging Markets Debt Corporate Fund (Institutional Class) – excluding sales charge 9.48 % * 2.42 % 3.52 % Bloomberg Global Aggregate Index 6.18 % 0.47 % 2.19 % J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified 9.87 % 2.35 % 3.68 % * The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Performance Table Market Index Changed [Text Block] | In connection with new regulatory requirements, effective the date of this report, the Fund changed its broad-based securities market benchmark index to the Bloomberg Global Aggregate Index. |
| Prior Market Index Comparison [Text Block] | Although the Bloomberg Global Aggregate Index can be considered broadly representative of the overall securities market applicable to the Fund, the Fund will continue to show the performance of the J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified for comparative purposes because the Delaware Management Company, the Fund's manager, believes it is more representative of the Fund’s investment universe. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 90,680,785 |
| Holdings Count | Holding | 154 |
| Advisory Fees Paid, Amount | $ 550,729 |
| Investment Company Portfolio Turnover | 94% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The tables below show the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Country allocation Brazil 8.08 % Mexico 7.67 % Chile 6.04 % Türkiye 5.24 % Indonesia 4.94 % Hong Kong 4.41 % Peru 3.88 % Colombia 3.54 % Argentina 3.28 % India 3.27 % Sector allocation Financials 25.37 % Oil & Gas 13.84 % Utilities 13.66 % Consumer 10.52 % Technology, Media and Telecommunication 8.63 % Industrial 7.94 % Metals & Mining 4.49 % Transport 3.56 % Infrastructure 2.72 % Real Estate 2.41 % |
| C000010992 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Strategic Income Fund |
| Class Name | Class A |
| Trading Symbol | DEGGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Strategic Income Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 0.84 % |
| Expenses Paid, Amount | $ 88 |
| Expense Ratio, Percent | 0.84% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Strategic Income Fund (Class A) returned 8.53%* (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance: Slowing inflation, resilient corporate and economic fundamentals, and sustained higher interest rates were the primary drivers of performance as credit spreads tightened throughout the year despite persistent macroeconomic uncertainty. Strong sector allocation and security selection impacts over the period primarily supported positive returns. In addition, the Fund benefited from significant exposure to floating rate assets and modestly positive yield curve management with a structurally short duration position compared with the benchmark. Key sector-level contributors to performance included: Overweight to high yield corporates Overweight to emerging markets and positive security selection therein Security selection within residential mortgage-backed securities (RMBS) Overweight to asset-backed securities (ABS) and collateralized loan obligations (CLOs) Top detractors from performance: In a rallying market, the main detractors from performance included the sector underweights used to fund overweight positions in other, stronger-performing sectors. Key sector-level detractors from performance included: Underweight to investment grade corporates Slightly negative security selection within high yield corporates Slightly negative security selection within US Treasurys |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Strategic Income Fund (Class A) – including sales charge 3.71 % 2.07 % 2.24 % Delaware Strategic Income Fund (Class A) – excluding sales charge 8.53 % * 3.02 % 2.71 % Bloomberg US Aggregate Index 5.10 % 0.19 % 1.61 % * The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 224,914,916 |
| Holdings Count | Holding | 242 |
| Advisory Fees Paid, Amount | $ 543,636 |
| Investment Company Portfolio Turnover | 160% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Corporate Bonds 52.58 % Loan Agreements 23.09 % Collateralized Debt Obligations 14.00 % Short-Term Investments 9.13 % Non-Agency Collateralized Mortgage Obligations 3.48 % Government Agency Obligations 1.91 % Common Stocks 1.13 % Sovereign Bonds 1.03 % Agency Collateralized Mortgage Obligations 0.68 % Supranational Banks 0.47 % |
| C000010994 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Strategic Income Fund |
| Class Name | Class C |
| Trading Symbol | DUGCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Strategic Income Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $ 1.59 % |
| Expenses Paid, Amount | $ 165 |
| Expense Ratio, Percent | 1.59% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Strategic Income Fund (Class C) returned 7.87%* (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance: Slowing inflation, resilient corporate and economic fundamentals, and sustained higher interest rates were the primary drivers of performance as credit spreads tightened throughout the year despite persistent macroeconomic uncertainty. Strong sector allocation and security selection impacts over the period primarily supported positive returns. In addition, the Fund benefited from significant exposure to floating rate assets and modestly positive yield curve management with a structurally short duration position compared with the benchmark. Key sector-level contributors to performance included: Overweight to high yield corporates Overweight to emerging markets and positive security selection therein Security selection within residential mortgage-backed securities (RMBS) Overweight to asset-backed securities (ABS) and collateralized loan obligations (CLOs) Top detractors from performance: In a rallying market, the main detractors from performance included the sector underweights used to fund overweight positions in other, stronger-performing sectors. Key sector-level detractors from performance included: Underweight to investment grade corporates Slightly negative security selection within high yield corporates Slightly negative security selection within US Treasurys |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Strategic Income Fund (Class C) – including sales charge 6.87 % 2.22 % 1.93 % Delaware Strategic Income Fund (Class C) – excluding sales charge 7.87 % * 2.22 % 1.93 % Bloomberg US Aggregate Index 5.10 % 0.19 % 1.61 % * The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 224,914,916 |
| Holdings Count | Holding | 242 |
| Advisory Fees Paid, Amount | $ 543,636 |
| Investment Company Portfolio Turnover | 160% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Corporate Bonds 52.58 % Loan Agreements 23.09 % Collateralized Debt Obligations 14.00 % Short-Term Investments 9.13 % Non-Agency Collateralized Mortgage Obligations 3.48 % Government Agency Obligations 1.91 % Common Stocks 1.13 % Sovereign Bonds 1.03 % Agency Collateralized Mortgage Obligations 0.68 % Supranational Banks 0.47 % |
| C000010995 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Strategic Income Fund |
| Class Name | Class R |
| Trading Symbol | DUGRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Strategic Income Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R $ 1.09 % |
| Expenses Paid, Amount | $ 114 |
| Expense Ratio, Percent | 1.09% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Strategic Income Fund (Class R) returned 8.26%* (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance: Slowing inflation, resilient corporate and economic fundamentals, and sustained higher interest rates were the primary drivers of performance as credit spreads tightened throughout the year despite persistent macroeconomic uncertainty. Strong sector allocation and security selection impacts over the period primarily supported positive returns. In addition, the Fund benefited from significant exposure to floating rate assets and modestly positive yield curve management with a structurally short duration position compared with the benchmark. Key sector-level contributors to performance included: Overweight to high yield corporates Overweight to emerging markets and positive security selection therein Security selection within residential mortgage-backed securities (RMBS) Overweight to asset-backed securities (ABS) and collateralized loan obligations (CLOs) Top detractors from performance: In a rallying market, the main detractors from performance included the sector underweights used to fund overweight positions in other, stronger-performing sectors. Key sector-level detractors from performance included: Underweight to investment grade corporates Slightly negative security selection within high yield corporates Slightly negative security selection within US Treasurys |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Strategic Income Fund (Class R) – including sales charge 8.26 % * 2.71 % 2.43 % Delaware Strategic Income Fund (Class R) – excluding sales charge 8.26 % * 2.71 % 2.43 % Bloomberg US Aggregate Index 5.10 % 0.19 % 1.61 % * The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 224,914,916 |
| Holdings Count | Holding | 242 |
| Advisory Fees Paid, Amount | $ 543,636 |
| Investment Company Portfolio Turnover | 160% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Corporate Bonds 52.58 % Loan Agreements 23.09 % Collateralized Debt Obligations 14.00 % Short-Term Investments 9.13 % Non-Agency Collateralized Mortgage Obligations 3.48 % Government Agency Obligations 1.91 % Common Stocks 1.13 % Sovereign Bonds 1.03 % Agency Collateralized Mortgage Obligations 0.68 % Supranational Banks 0.47 % |
| C000010996 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Delaware Strategic Income Fund |
| Class Name | Institutional Class |
| Trading Symbol | DUGIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Delaware Strategic Income Fund (Fund) for the period of August 1, 2023, to July 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at delawarefunds.com/literature. You can also request this information by contacting us at 800 523-1918, weekdays from 8:30am to 6:00pm ET. |
| Additional Information Phone Number | 800 523-1918 |
| Additional Information Website | delawarefunds.com/literature |
| Expenses [Text Block] | What were the Fund's costs for the last 12 months? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional Class $ 0.59 % |
| Expenses Paid, Amount | $ 62 |
| Expense Ratio, Percent | 0.59% |
| Factors Affecting Performance [Text Block] | Management’s discussion of Fund performance Performance highlights Delaware Strategic Income Fund (Institutional Class) returned 8.80%* (excluding sales charge) for the 12 months ended July 31, 2024. Top contributors to performance: Slowing inflation, resilient corporate and economic fundamentals, and sustained higher interest rates were the primary drivers of performance as credit spreads tightened throughout the year despite persistent macroeconomic uncertainty. Strong sector allocation and security selection impacts over the period primarily supported positive returns. In addition, the Fund benefited from significant exposure to floating rate assets and modestly positive yield curve management with a structurally short duration position compared with the benchmark. Key sector-level contributors to performance included: Overweight to high yield corporates Overweight to emerging markets and positive security selection therein Security selection within residential mortgage-backed securities (RMBS) Overweight to asset-backed securities (ABS) and collateralized loan obligations (CLOs) Top detractors from performance: In a rallying market, the main detractors from performance included the sector underweights used to fund overweight positions in other, stronger-performing sectors. Key sector-level detractors from performance included: Underweight to investment grade corporates Slightly negative security selection within high yield corporates Slightly negative security selection within US Treasurys |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Class. It also assumes a $10,000 initial investment at the beginning of the first full fiscal year in a broad-based Growth of $10,000 investment For the period July 31, 2014, through July 31, 2024 |
| Average Annual Return [Table Text Block] | Average annual total returns (as of July 31, 2024) 1 year 5 year 10 year Delaware Strategic Income Fund (Institutional Class) – including sales charge 8.80 % * 3.25 % 2.95 % Delaware Strategic Income Fund (Institutional Class) – excluding sales charge 8.80 % * 3.25 % 2.95 % Bloomberg US Aggregate Index 5.10 % 0.19 % 1.61 % * The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares. |
| Updated Performance Information Location [Text Block] | Visit delawarefunds.com/performance for the most recent performance information. |
| Net Assets | $ 224,914,916 |
| Holdings Count | Holding | 242 |
| Advisory Fees Paid, Amount | $ 543,636 |
| Investment Company Portfolio Turnover | 160% |
| Additional Fund Statistics [Text Block] | Fund statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Fund holdings The table below shows the investment makeup of the Fund, with each category representing a percentage of the total net assets of the Fund. Portfolio composition Corporate Bonds 52.58 % Loan Agreements 23.09 % Collateralized Debt Obligations 14.00 % Short-Term Investments 9.13 % Non-Agency Collateralized Mortgage Obligations 3.48 % Government Agency Obligations 1.91 % Common Stocks 1.13 % Sovereign Bonds 1.03 % Agency Collateralized Mortgage Obligations 0.68 % Supranational Banks 0.47 % |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 60 Months Ended | 120 Months Ended | |||||||||||
| Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2024 | Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2014 | ||
| C000130079 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Emerging Markets Debt Corporate Fund (Class A) – including sales charge | |||||||||||||
| Account Value | $ 13,231 | $ 13,231 | $ 13,231 | $ 12,131 | $ 11,366 | $ 13,191 | $ 12,103 | $ 11,897 | $ 10,795 | $ 10,805 | $ 10,002 | $ 9,294 | $ 9,550 | |
| Average Annual Return, Percent | 4.16% | 1.21% | 2.84% | |||||||||||
| C000130079 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Emerging Markets Debt Corporate Fund (Class A) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 9.07% | 2.15% | 3.32% | |||||||||||
| C000130080 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Emerging Markets Debt Corporate Fund (Class C) – including sales charge | |||||||||||||
| Account Value | $ 13,108 | $ 13,108 | $ 13,108 | 12,116 | 11,432 | 13,364 | 12,352 | 12,231 | 11,194 | 11,288 | 10,477 | 9,747 | 10,000 | |
| Average Annual Return, Percent | 7.19% | 1.39% | 2.74% | |||||||||||
| C000130080 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Emerging Markets Debt Corporate Fund (Class C) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 8.19% | 1.39% | 2.74% | |||||||||||
| C000130082 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Emerging Markets Debt Corporate Fund (Institutional Class) – including sales charge | |||||||||||||
| Account Value | $ 14,134 | $ 14,134 | $ 14,134 | 12,910 | 12,065 | 13,964 | 12,777 | 12,542 | 11,359 | 11,341 | 10,477 | 9,747 | 10,000 | |
| Average Annual Return, Percent | 9.48% | [1] | 2.42% | 3.52% | ||||||||||
| C000130082 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Emerging Markets Debt Corporate Fund (Institutional Class) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 9.48% | [1] | 2.42% | 3.52% | ||||||||||
| C000010992 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Class A) – including sales charge | |||||||||||||
| Account Value | $ 12,479 | $ 12,479 | $ 12,479 | 11,498 | 11,056 | 12,346 | 11,420 | 10,746 | 10,213 | 10,276 | 10,106 | 9,703 | 9,550 | |
| Average Annual Return, Percent | 3.71% | 2.07% | 2.24% | |||||||||||
| C000010992 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Class A) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 8.53% | [2] | 3.02% | 2.71% | ||||||||||
| C000010994 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Class C) – including sales charge | |||||||||||||
| Account Value | $ 12,108 | $ 12,108 | $ 12,108 | 11,225 | 10,889 | 12,265 | 11,433 | 10,839 | 10,380 | 10,521 | 10,425 | 10,084 | 10,000 | |
| Average Annual Return, Percent | 6.87% | 2.22% | 1.93% | |||||||||||
| C000010994 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Class C) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 7.87% | [3] | 2.22% | 1.93% | ||||||||||
| C000010995 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Class R) – including sales charge | |||||||||||||
| Account Value | $ 12,714 | $ 12,714 | $ 12,714 | 11,744 | 11,321 | 12,700 | 11,779 | 11,112 | 10,576 | 10,678 | 10,528 | 10,134 | 10,000 | |
| Average Annual Return, Percent | 8.26% | [4] | 2.71% | 2.43% | ||||||||||
| C000010995 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Class R) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 8.26% | [4] | 2.71% | 2.43% | ||||||||||
| C000010996 [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Institutional Class) – including sales charge | |||||||||||||
| Account Value | $ 13,379 | $ 13,379 | $ 13,379 | 12,296 | 11,794 | 13,152 | 12,135 | 11,391 | 10,800 | 10,837 | 10,632 | 10,183 | 10,000 | |
| Average Annual Return, Percent | 8.80% | [5] | 3.25% | 2.95% | ||||||||||
| C000010996 [Member] | Without Sales Load [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Delaware Strategic Income Fund (Institutional Class) – excluding sales charge | |||||||||||||
| Average Annual Return, Percent | 8.80% | [5] | 3.25% | 2.95% | ||||||||||
| Bloomberg Global Aggregate Index [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Bloomberg Global Aggregate Index | |||||||||||||
| Account Value | $ 12,422 | $ 12,422 | $ 12,422 | 11,699 | 11,932 | 12,937 | 12,907 | 12,132 | 11,170 | 11,021 | 11,097 | 10,375 | 10,000 | |
| Average Annual Return, Percent | 6.18% | 0.47% | 2.19% | |||||||||||
| Bloomberg US Aggregate Index [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | Bloomberg US Aggregate Index | |||||||||||||
| Account Value | $ 11,726.80928 | $ 11,726.80928 | $ 11,726.80928 | 11,157.64945 | 11,546.52392 | 12,704.73079 | 12,794.51788 | 11,618.57518 | 10,749.89806 | 10,836.60232 | 10,892.67275 | 10,282.40838 | 10,000 | |
| Average Annual Return, Percent | 5.10% | 0.19% | 1.61% | |||||||||||
| J P Morgan Corporate Emerging Markets Bond Index CEMBI Broad Diversified [Member] | ||||||||||||||
| Account Value [Line Items] | ||||||||||||||
| Line Graph and Table Measure Name | J.P. Morgan Corporate Emerging Markets Bond Index (CEMBI) Broad Diversified | |||||||||||||
| Account Value | $ 14,360 | $ 14,360 | $ 14,360 | $ 13,070 | $ 12,378 | $ 14,317 | $ 13,451 | $ 12,785 | $ 11,664 | $ 11,605 | $ 10,951 | $ 10,233 | $ 10,000 | |
| Average Annual Return, Percent | 9.87% | 2.35% | 3.68% | |||||||||||
| [1]The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles.[2]The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles.[3]The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles.[4]The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles.[5]The total return presented is calculated based on the net asset value at which shareholder transactions were processed and does not take into account certain adjustments that are necessary under US generally accepted accounting principles. | ||||||||||||||
| Shareholder Report, Holdings (Details) | Jul. 31, 2024 |
| C000130079 [Member] | Consumer Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.52% |
| C000130079 [Member] | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.37% |
| C000130079 [Member] | Oil and Gas [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.84% |
| C000130079 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.41% |
| C000130079 [Member] | Transportation Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.56% |
| C000130079 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.94% |
| C000130079 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.66% |
| C000130079 [Member] | Technology Media and Telecommunication [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.63% |
| C000130079 [Member] | Metals And Mining [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.49% |
| C000130079 [Member] | Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.72% |
| C000130079 [Member] | ARGENTINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.28% |
| C000130079 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.08% |
| C000130079 [Member] | CHILE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.04% |
| C000130079 [Member] | COLOMBIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.54% |
| C000130079 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.41% |
| C000130079 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.94% |
| C000130079 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.27% |
| C000130079 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.67% |
| C000130079 [Member] | PERU | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.88% |
| C000130079 [Member] | TÜRKIYE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.24% |
| C000130080 [Member] | Consumer Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.52% |
| C000130080 [Member] | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.37% |
| C000130080 [Member] | Oil and Gas [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.84% |
| C000130080 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.41% |
| C000130080 [Member] | Transportation Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.56% |
| C000130080 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.94% |
| C000130080 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.66% |
| C000130080 [Member] | Technology Media and Telecommunication [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.63% |
| C000130080 [Member] | Metals And Mining [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.49% |
| C000130080 [Member] | Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.72% |
| C000130080 [Member] | ARGENTINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.28% |
| C000130080 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.08% |
| C000130080 [Member] | CHILE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.04% |
| C000130080 [Member] | COLOMBIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.54% |
| C000130080 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.41% |
| C000130080 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.94% |
| C000130080 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.27% |
| C000130080 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.67% |
| C000130080 [Member] | PERU | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.88% |
| C000130080 [Member] | TÜRKIYE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.24% |
| C000130082 [Member] | Consumer Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.52% |
| C000130082 [Member] | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.37% |
| C000130082 [Member] | Oil and Gas [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.84% |
| C000130082 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.41% |
| C000130082 [Member] | Transportation Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.56% |
| C000130082 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.94% |
| C000130082 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.66% |
| C000130082 [Member] | Technology Media and Telecommunication [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.63% |
| C000130082 [Member] | Metals And Mining [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.49% |
| C000130082 [Member] | Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.72% |
| C000130082 [Member] | ARGENTINA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.28% |
| C000130082 [Member] | BRAZIL | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.08% |
| C000130082 [Member] | CHILE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.04% |
| C000130082 [Member] | COLOMBIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.54% |
| C000130082 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.41% |
| C000130082 [Member] | INDONESIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.94% |
| C000130082 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.27% |
| C000130082 [Member] | MEXICO | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.67% |
| C000130082 [Member] | PERU | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.88% |
| C000130082 [Member] | TÜRKIYE | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.24% |
| C000010992 [Member] | Collateralized Debt Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000010992 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.13% |
| C000010992 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.58% |
| C000010992 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.13% |
| C000010992 [Member] | Loan Agreements [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.09% |
| C000010992 [Member] | Non Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.48% |
| C000010992 [Member] | Government Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.91% |
| C000010992 [Member] | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.03% |
| C000010992 [Member] | Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.68% |
| C000010992 [Member] | Supranational Banks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.47% |
| C000010994 [Member] | Collateralized Debt Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000010994 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.13% |
| C000010994 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.58% |
| C000010994 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.13% |
| C000010994 [Member] | Loan Agreements [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.09% |
| C000010994 [Member] | Non Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.48% |
| C000010994 [Member] | Government Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.91% |
| C000010994 [Member] | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.03% |
| C000010994 [Member] | Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.68% |
| C000010994 [Member] | Supranational Banks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.47% |
| C000010995 [Member] | Collateralized Debt Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000010995 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.13% |
| C000010995 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.58% |
| C000010995 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.13% |
| C000010995 [Member] | Loan Agreements [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.09% |
| C000010995 [Member] | Non Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.48% |
| C000010995 [Member] | Government Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.91% |
| C000010995 [Member] | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.03% |
| C000010995 [Member] | Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.68% |
| C000010995 [Member] | Supranational Banks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.47% |
| C000010996 [Member] | Collateralized Debt Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000010996 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.13% |
| C000010996 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.58% |
| C000010996 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.13% |
| C000010996 [Member] | Loan Agreements [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.09% |
| C000010996 [Member] | Non Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.48% |
| C000010996 [Member] | Government Agency Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.91% |
| C000010996 [Member] | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.03% |
| C000010996 [Member] | Agency Collateralized Mortgage Obligations [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.68% |
| C000010996 [Member] | Supranational Banks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.47% |
