| Form N-CSR Cover | 12 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | JOHN HANCOCK SOVEREIGN BOND FUND |
| Entity Central Index Key | 0000045288 |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 12 Months Ended |
| May 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | JOHN HANCOCK SOVEREIGN BOND FUND |
| Entity Central Index Key | 0000045288 |
| Document Period End Date | May 31, 2024 |
| C000001854 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class A |
| Trading Symbol | JHNBX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Material Fund Change Notice [Text Block] | This report describes changes to the fund that occurred during the reporting period. |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 0.77 % |
| Expenses Paid, Amount | $ 78 |
| Expense Ratio, Percent | 0.77% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class A/JHNBX) returned 2.35% (excluding sales charges) for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $10,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class A/JHNBX) (1.74 ) % (0.61 ) % 1.16 % Bond Fund (Class A/JHNBX)—excluding sales charge 2.35 ) % 0.21 ) % 1.57 % Bloomberg U.S. Aggregate Bond Index 1.31 ) % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| Material Fund Change [Text Block] | Material Fund Changes At a meeting held on December 12–14, 2023, the fund’s Board of Trustees approved a sales charge reduction and change to the contingent deferred sales charge (CDSC) for Class A shares. As a result, effective March 1, 2024, the maximum CDSC as a percentage of purchase or sale price, whichever is less, was reduced from 1.00% on certain purchases of $1 million or more, to 0.75% on certain purchases of $500,000 or more. This is a summary of certain changes to the fund since 6-1-23. For more complete information, you may review the fund’s next prospectus, which we expect to be available by 10-1-24 at jhinvestments.com/documents or by calling 800-225-5291. |
| Material Fund Change Expenses [Text Block] | At a meeting held on December 12–14, 2023, the fund’s Board of Trustees approved a sales charge reduction and change to the contingent deferred sales charge (CDSC) for Class A shares. As a result, effective March 1, 2024, the maximum CDSC as a percentage of purchase or sale price, whichever is less, was reduced from 1.00% on certain purchases of $1 million or more, to 0.75% on certain purchases of $500,000 or more. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the fund since 6-1-23. For more complete information, you may review the fund’s next prospectus, which we expect to be available by 10-1-24 at jhinvestments.com/documents or by calling 800-225-5291. |
| Updated Prospectus Phone Number | 800-225-5291 |
| Updated Prospectus Web Address | jhinvestments.com/documents |
| C000153977 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class NAV |
| No Trading Symbol Flag | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 0.35 % |
| Expenses Paid, Amount | $ 36 |
| Expense Ratio, Percent | 0.35% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class NAV) returned 2.85% for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $10,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class NAV) 2.85 % 0.62 ) % 1.95 % Bloomberg U.S. Aggregate Bond Index 1.31 % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. Class NAV shares were first offered on 8-31-15. Returns prior to this date are those of Class A shares that have not been adjusted for class-specific expenses; otherwise, returns would vary. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| C000153978 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class R4 |
| Trading Symbol | JBFRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 0.61 % |
| Expenses Paid, Amount | $ 62 |
| Expense Ratio, Percent | 0.61% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class R4/JBFRX) returned 2.59% for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $10,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class R4/JBFRX) 2.59 % 0.36 ) % 1.73 % Bloomberg U.S. Aggregate Bond Index 1.31 % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. Class R4 shares were first offered on 3-27-15. Returns prior to this date are those of Class A shares that have not been adjusted for class-specific expenses; otherwise, returns would vary. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| C000001856 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class C |
| Trading Symbol | JHCBX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 1.47 % |
| Expenses Paid, Amount | $ 148 |
| Expense Ratio, Percent | 1.47% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class C/JHCBX) returned 1.63% (excluding sales charges) for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $10,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class C/JHCBX) 0.65 % (0.50 ) % 0.87 % Bond Fund (Class C/JHCBX)—excluding sales charge 1.63 % (0.50 ) % 0.87 % Bloomberg U.S. Aggregate Bond Index 1.31 % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| C000001857 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class I |
| Trading Symbol | JHBIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 0.47 % |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.47% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class I/JHBIX) returned 2.65% for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $250,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $250,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class I/JHBIX) 2.65 % 0.50 ) % 1.88 % Bloomberg U.S. Aggregate Bond Index 1.31 % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| C000106442 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class R6 |
| Trading Symbol | JHBSX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 0.36 % |
| Expenses Paid, Amount | $ 37 |
| Expense Ratio, Percent | 0.36% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class R6/JHBSX) returned 2.85% for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $1,000,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $1,000,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class R6/JHBSX) 2.85 % 0.62 ) % 2.00 % Bloomberg U.S. Aggregate Bond Index 1.31 % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| C000113488 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | John Hancock Bond Fund |
| Class Name | Class R2 |
| Trading Symbol | JHRBX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Bond Fund (the fund) for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the fund at jhinvestments.com/documents |
| Additional Information Phone Number | 800-225-5291 |
| Additional Information Website | jhinvestments.com/documents |
| Expenses [Text Block] | What were the fund costs during the last year? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage Bond Fund $ 0.86 % |
| Expenses Paid, Amount | $ 87 |
| Expense Ratio, Percent | 0.86% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Bond Fund (Class R2/JHRBX) returned 2.34% for the year ended May 31, 2024. The bond market posted a gain in the annual period. Bond prices experienced volatility due to the combination of persistent inflation and uncertainty as to when the U.S. Federal Reserve would begin to cut interest rates. High-yield and investment-grade corporate bonds performed particularly well on the strength of better-than expected economic growth, steady earnings, and robust investor risk appetites. TOP PERFORMANCE CONTRIBUTORS Corporate bonds High-yield corporates TOP PERFORMANCE DETRACTORS Duration (interest rate sensitivity) Specific holdings in U.S. Treasuries and emerging market corporates The views expressed in this report are exclusively those of the portfolio management team at Manulife Investment Management (US) LLC, and are subject to change. They are not meant as investment advice. |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future results. |
| 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 fund (or for the life of the fund, if shorter). It assumes a $10,000 initial investment in the fund and in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years Bond Fund (Class R2/JHRBX) 2.34 % 0.12 ) % 1.49 % Bloomberg U.S. Aggregate Bond Index 1.31 % (0.17 ) % 1.26 % The Fund has designated Bloomberg U.S. Aggregate Bond Index as its broad-based securities market index in accordance with the revised definition for such an index. |
| 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] | Due to market volatility and other factors, the fund’s current performance may be higher or lower than the performance shown and can be found at jhinvestments.com/investments |
| Net Assets | $ 24,387,177,373 |
| Holdings Count | Holding | 1,035 |
| Advisory Fees Paid, Amount | $ 68,882,662 |
| Investment Company Portfolio Turnover | 133% |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund net assets $ % Total number of portfolio holdings $ % Total advisory fees paid (net) $ % Portfolio turnover rate $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the fund, representing percentage of the total net assets of the fund. Portfolio Composition Corporate bonds 36.9 % U.S. Government Agency 34.5 % U.S. Government 18.7 % Asset backed securities 5.4 % Collateralized mortgage obligations – Commercial and residential 2.5 % Collateralized mortgage obligations – U.S. Government Agency 0.9 % Municipal bonds 0.1 % Term loans 0.1 % Short-term investments and other 0.9 % Quality Composition Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. Holdings may not have been held by the fund for the entire period and are subject to change without notice. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk and may change at any time. |
| Credit Quality Explanation [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. “Not rated” securities are those with no ratings available from these agencies. All ratings are as of 5-31-24 and do not reflect subsequent downgrades or upgrades, if any. |
| Credit Ratings Selection [Text Block] | Ratings are from Moody’s Investors Service, Inc. If not available, we have used S&P Global Ratings. In the absence of ratings from these agencies, we have used Fitch Ratings, Inc. |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 60 Months Ended | 120 Months Ended | ||||||||||
| May 31, 2024 | May 31, 2024 | May 31, 2024 | May 31, 2023 | May 31, 2022 | May 31, 2021 | May 31, 2020 | May 31, 2019 | May 31, 2018 | May 31, 2017 | May 31, 2016 | May 31, 2015 | May 31, 2014 | |
| C000001854 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class A/JHNBX) | ||||||||||||
| Account Value | $ 11,222.32119 | $ 11,222.32119 | $ 11,222.32119 | $ 10,964.96695 | $ 11,264.62293 | $ 12,363.8008 | $ 11,908.14572 | $ 11,106.36191 | $ 10,445.31048 | $ 10,456.5853 | $ 10,047.45629 | $ 9,890.468448 | $ 9,600 |
| Average Annual Return, Percent | (1.74%) | (0.61%) | 1.16% | ||||||||||
| C000001854 [Member] | Without Sales Load [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class A/JHNBX)—excluding sales charge | ||||||||||||
| Average Annual Return, Percent | 2.35% | 0.21% | 1.57% | ||||||||||
| C000153977 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class NAV) | ||||||||||||
| Account Value | $ 12,128.06475 | $ 12,128.06475 | $ 12,128.06475 | 11,791.68236 | 12,079.75109 | 13,200.44786 | 12,653.52905 | 11,759.82045 | 11,008.11234 | 10,975.91001 | 10,502.19114 | 10,302.5713 | 10,000 |
| Average Annual Return, Percent | 2.85% | 0.62% | 1.95% | ||||||||||
| C000153978 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class R4/JBFRX) | ||||||||||||
| Account Value | $ 11,873.2963 | $ 11,873.2963 | $ 11,873.2963 | 11,573.37788 | 11,886.75555 | 13,022.82971 | 12,515.72471 | 11,661.84663 | 10,944.8592 | 10,940.9489 | 10,494.83075 | 10,303.4378 | 10,000 |
| Average Annual Return, Percent | 2.59% | 0.36% | 1.73% | ||||||||||
| C000001856 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class C/JHCBX) | ||||||||||||
| Account Value | $ 10,900.31685 | $ 10,900.31685 | $ 10,900.31685 | 10,725.09454 | 11,095.77509 | 12,264.23771 | 11,895.26053 | 11,178.95259 | 10,580.4661 | 10,666.255 | 10,320.65117 | 10,230.7651 | 10,000 |
| Average Annual Return, Percent | 0.65% | (0.50%) | 0.87% | ||||||||||
| C000001856 [Member] | Without Sales Load [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class C/JHCBX)—excluding sales charge | ||||||||||||
| Average Annual Return, Percent | 1.63% | (0.50%) | 0.87% | ||||||||||
| C000001857 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class I/JHBIX) | ||||||||||||
| Account Value | $ 301,143.0653 | $ 301,143.0653 | $ 301,143.0653 | 293,361.3704 | 300,686.3731 | 329,009.9011 | 315,745.6384 | 293,797.1957 | 275,358.6569 | 274,861.8797 | 263,451.7855 | 258,367.45 | 250,000 |
| Average Annual Return, Percent | 2.65% | 0.50% | 1.88% | ||||||||||
| C000106442 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class R6/JHBSX) | ||||||||||||
| Account Value | $ 1,218,937.682 | $ 1,218,937.682 | $ 1,218,937.682 | 1,185,175.677 | 1,213,348.514 | 1,326,040.139 | 1,272,029.218 | 1,181,627.638 | 1,106,238.201 | 1,103,777.803 | 1,055,478.515 | 1,034,552.65 | 1,000,000 |
| Average Annual Return, Percent | 2.85% | 0.62% | 2% | ||||||||||
| C000113488 [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bond Fund (Class R2/JHRBX) | ||||||||||||
| Account Value | $ 11,594.75267 | $ 11,594.75267 | $ 11,594.75267 | 11,329.84802 | 11,656.83471 | 12,804.54978 | 12,344.37708 | 11,523.81733 | 10,841.97669 | 10,872.29365 | 10,456.71866 | 10,297.5181 | 10,000 |
| Average Annual Return, Percent | 2.34% | 0.12% | 1.49% | ||||||||||
| Bloomberg U S Aggregate Bond Index [Member] | |||||||||||||
| Account Value [Line Items] | |||||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Bond Index | ||||||||||||
| Account Value | $ 11,329.03825 | $ 11,329.03825 | $ 11,329.03825 | $ 11,183.04019 | $ 11,427.91831 | $ 12,451.70239 | $ 12,502.3194 | $ 11,426.45554 | $ 10,739.09302 | $ 10,779.47595 | $ 10,611.97735 | $ 10,303.4048 | $ 10,000 |
| Average Annual Return, Percent | 1.31% | (0.17%) | 1.26% |
| Shareholder Report, Holdings (Details) | May 31, 2024 |
| C000001854 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000001854 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001854 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000001854 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000001854 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000001854 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001854 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001854 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000001854 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001854 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000001854 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000001854 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000001854 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000001854 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000001854 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000153977 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000153977 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153977 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153977 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000153977 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000153977 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153977 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153977 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000153977 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153977 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000153977 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000153977 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000153977 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000153977 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000153977 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000153978 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000153978 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153978 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153978 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000153978 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000153978 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153978 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153978 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000153978 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153978 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000153978 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000153978 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000153978 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000153978 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000153978 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000001856 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000001856 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001856 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000001856 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000001856 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000001856 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001856 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001856 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000001856 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001856 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000001856 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000001856 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000001856 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000001856 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000001856 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000001857 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000001857 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001857 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000001857 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000001857 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000001857 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001857 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001857 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000001857 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000001857 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000001857 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000001857 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000001857 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000001857 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000001857 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000106442 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000106442 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000106442 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106442 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000106442 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000106442 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000106442 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000106442 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000106442 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000106442 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000106442 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000106442 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000106442 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000106442 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000106442 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000113488 [Member] | US Government Debt Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000113488 [Member] | Short Term Investments Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000113488 [Member] | CCC and below [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113488 [Member] | Not rated [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000113488 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000113488 [Member] | Mortgage Backed Securities Issued by US Government Sponsored Enterprises Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000113488 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000113488 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000113488 [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000113488 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.70% |
| C000113488 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000113488 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000113488 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 36.90% |
| C000113488 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34.50% |
| C000113488 [Member] | Term loans [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Label | Element | Value |
| C000106442 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000106442 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000106442 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000106442 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000106442 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000106442 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
| C000001854 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000001854 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000001854 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000001854 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000001854 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000001854 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
| C000001857 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000001857 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000001857 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000001857 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000001857 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000001857 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
| C000153977 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000153977 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000153977 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000153977 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000153977 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000153977 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
| C000113488 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000113488 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000113488 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000113488 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000113488 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000113488 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
| C000153978 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000153978 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000153978 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000153978 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000153978 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000153978 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
| C000001856 [Member] | Standard & Poor's, BB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 8% |
| C000001856 [Member] | Standard & Poor's, BBB Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 22.60% |
| C000001856 [Member] | Standard & Poor's, AA Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| C000001856 [Member] | Standard & Poor's, B Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 2.40% |
| C000001856 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| C000001856 [Member] | Standard & Poor's, A Rating [Member] | ||
| Percent of Net Asset Value | oef_PctOfNav | 7.10% |
