| Form N-CSR Cover | 12 Months Ended |
| Aug. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | JOHN HANCOCK FUNDS II |
| Entity Central Index Key | 0001331971 |
| Document Period End Date | Aug. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Aug. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | JOHN HANCOCK FUNDS II |
| Entity Central Index Key | 0001331971 |
| Document Period End Date | Aug. 31, 2024 |
| C000037340 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLBOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2015 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class 1/JLBOX) returned 12.55% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class 1/JLBOX) 12.55 % 5.73 % ) 5.08 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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. |
| Net Assets | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000037330 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLBAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2015 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class A/JLBAX) returned 12.15% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class A/JLBAX) 6.56 % 4.26 % ) 4.16 % Multimanager 2015 Lifetime Portfolio (Class A/JLBAX)—excluding sales charge 12.15 % 5.33 % ) 4.70 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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 | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000153957 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHREX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2015 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class I/JHREX) returned 12.47% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class I/JHREX) 12.47 % 5.63 % ) 4.97 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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 | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000113504 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLBKX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2015 Lifetime Portfolio $ 0.51 % |
| Expenses Paid, Amount | $ 54 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class R2/JLBKX) returned 12.16% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class R2/JLBKX) 12.16 % 5.26 % ) 4.61 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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 | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000037338 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLBGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2015 Lifetime Portfolio $ 0.15 % |
| Expenses Paid, Amount | $ 16 |
| Expense Ratio, Percent | 0.15% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class R4/JLBGX) returned 12.58% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class R4/JLBGX) 12.58 % 5.71 % ) 4.97 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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 | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000037339 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLBHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2015 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class R5/JLBHX) returned 12.55% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class R5/JLBHX) 12.55 % 5.69 % ) 5.07 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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 | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000106460 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2015 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLBJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2015 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2015 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2015 Lifetime Portfolio (Class R6/JLBJX) returned 12.73% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2015 Lifetime Portfolio (Class R6/JLBJX) 12.73 % 5.79 % ) 5.14 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2015 Index 12.78 % 5.58 % ) 5.16 % John Hancock 2015 Lifetime Index 12.97 % 5.57 % ) 5.41 % |
| 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 | $ 162,881,127 |
| Holdings Count | Holding | 45 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.8 % Equity 30.0 % International equity 12.3 % U.S. large cap 7.8 % Large blend 7.7 % U.S. mid cap 1.8 % Emerging-market equity 0.4 % Fixed income 52.4 % Intermediate bond 26.3 % Short-term bond 9.0 % Multi-sector bond 5.0 % Emerging-market debt 5.0 % High yield bond 3.6 % Bank loan 3.5 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 2.2 % Equity 2.2 % U.S. Government 7.9 % Short-term investments and other 0.1 % 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. |
| C000037373 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLFOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2030 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class 1/JLFOX) returned 16.48% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class 1/JLFOX) 16.48 % 8.21 % 6.83 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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. |
| Net Assets | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000037363 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLFAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2030 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class A/JLFAX) returned 16.02% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class A/JLFAX) 10.21 % 6.71 % 5.89 % Multimanager 2030 Lifetime Portfolio (Class A/JLFAX)—excluding sales charge 16.02 % 7.81 % 6.43 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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 | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000153960 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2030 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class I/JHRGX) returned 16.51% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class I/JHRGX) 16.51 % 8.17 % 6.73 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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 | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000113507 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLFEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2030 Lifetime Portfolio $ 0.50 % |
| Expenses Paid, Amount | $ 54 |
| Expense Ratio, Percent | 0.50% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class R2/JLFEX) returned 15.99% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class R2/JLFEX) 15.99 % 7.73 % 6.34 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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 | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000037371 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLFGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2030 Lifetime Portfolio $ 0.25 % |
| Expenses Paid, Amount | $ 27 |
| Expense Ratio, Percent | 0.25% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class R4/JLFGX) returned 16.19% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class R4/JLFGX) 16.19 % 7.99 % 6.61 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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 | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000037372 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLFHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2030 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class R5/JLFHX) returned 16.48% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class R5/JLFHX) 16.48 % 8.21 % 6.82 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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 | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000106463 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2030 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLFIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2030 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2030 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2030 Lifetime Portfolio (Class R6/JLFIX) returned 16.54% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2030 Lifetime Portfolio (Class R6/JLFIX) 16.54 % 8.26 % 6.88 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2030 Index 16.06 % 8.03 % 6.83 % John Hancock 2030 Lifetime Index 16.69 % 8.33 % 7.61 % |
| 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 | $ 1,161,361,648 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 54.6 % International equity 17.7 % U.S. large cap 15.4 % Large blend 12.5 % U.S. mid cap 5.3 % Emerging-market equity 2.5 % Sector equity 0.7 % U.S. small cap 0.5 % Fixed income 28.5 % Intermediate bond 15.6 % Emerging-market debt 3.4 % Short-term bond 3.2 % Multi-sector bond 2.8 % High yield bond 2.5 % Bank loan 1.0 % Alternative and specialty 7.4 % Sector equity 6.4 % Absolute return 1.0 % Unaffiliated investment companies 4.0 % Equity 4.0 % U.S. Government 5.3 % Short-term investments and other 0.2 % 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. |
| C000037309 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2010 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLAOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2010 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2010 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2010 Lifetime Portfolio (Class 1/JLAOX) returned 11.74% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2010 Lifetime Portfolio (Class 1/JLAOX) 11.74 % 5.24 % ) 4.72 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2010 Index 12.24 % 5.11 % ) 4.73 % John Hancock 2010 Lifetime Index 12.14 % 5.06 % ) 4.94 % |
| 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. |
| Net Assets | $ 123,160,458 |
| Holdings Count | Holding | 42 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 24% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.3 % Equity 23.9 % International equity 11.0 % Large blend 6.0 % U.S. large cap 6.0 % U.S. mid cap 0.9 % Fixed income 58.1 % Intermediate bond 28.2 % Short-term bond 11.4 % Multi-sector bond 5.2 % Emerging-market debt 5.2 % Bank loan 4.3 % High yield bond 3.8 % Alternative and specialty 7.3 % Sector equity 6.3 % Absolute return 1.0 % Unaffiliated investment companies 1.6 % Equity 1.6 % U.S. Government 8.8 % Short-term investments and other 0.3 % 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. |
| C000037307 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2010 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLAAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2010 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2010 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 44 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2010 Lifetime Portfolio (Class A/JLAAX) returned 11.21% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2010 Lifetime Portfolio (Class A/JLAAX) 5.61 % 3.78 % ) 3.81 % Multimanager 2010 Lifetime Portfolio (Class A/JLAAX)—excluding sales charge 11.21 % 4.86 % ) 4.35 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2010 Index 12.24 % 5.11 % ) 4.73 % John Hancock 2010 Lifetime Index 12.14 % 5.06 % ) 4.94 % |
| 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 | $ 123,160,458 |
| Holdings Count | Holding | 42 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 24% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.3 % Equity 23.9 % International equity 11.0 % Large blend 6.0 % U.S. large cap 6.0 % U.S. mid cap 0.9 % Fixed income 58.1 % Intermediate bond 28.2 % Short-term bond 11.4 % Multi-sector bond 5.2 % Emerging-market debt 5.2 % Bank loan 4.3 % High yield bond 3.8 % Alternative and specialty 7.3 % Sector equity 6.3 % Absolute return 1.0 % Unaffiliated investment companies 1.6 % Equity 1.6 % U.S. Government 8.8 % Short-term investments and other 0.3 % 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. |
| C000153956 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2010 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRLX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2010 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2010 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2010 Lifetime Portfolio (Class I/JHRLX) returned 11.82% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2010 Lifetime Portfolio (Class I/JHRLX) 11.82 % 5.17 % ) 4.63 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2010 Index 12.24 % 5.11 % ) 4.73 % John Hancock 2010 Lifetime Index 12.14 % 5.06 % ) 4.94 % |
| 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 | $ 123,160,458 |
| Holdings Count | Holding | 42 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 24% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.3 % Equity 23.9 % International equity 11.0 % Large blend 6.0 % U.S. large cap 6.0 % U.S. mid cap 0.9 % Fixed income 58.1 % Intermediate bond 28.2 % Short-term bond 11.4 % Multi-sector bond 5.2 % Emerging-market debt 5.2 % Bank loan 4.3 % High yield bond 3.8 % Alternative and specialty 7.3 % Sector equity 6.3 % Absolute return 1.0 % Unaffiliated investment companies 1.6 % Equity 1.6 % U.S. Government 8.8 % Short-term investments and other 0.3 % 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. |
| C000113503 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2010 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLAEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2010 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2010 Lifetime Portfolio $ 0.49 % |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.49% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2010 Lifetime Portfolio (Class R2/JLAEX) returned 11.28% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2010 Lifetime Portfolio (Class R2/JLAEX) 11.28 % 4.79 % ) 4.27 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2010 Index 12.24 % 5.11 % ) 4.73 % John Hancock 2010 Lifetime Index 12.14 % 5.06 % ) 4.94 % |
| 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 | $ 123,160,458 |
| Holdings Count | Holding | 42 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 24% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.3 % Equity 23.9 % International equity 11.0 % Large blend 6.0 % U.S. large cap 6.0 % U.S. mid cap 0.9 % Fixed income 58.1 % Intermediate bond 28.2 % Short-term bond 11.4 % Multi-sector bond 5.2 % Emerging-market debt 5.2 % Bank loan 4.3 % High yield bond 3.8 % Alternative and specialty 7.3 % Sector equity 6.3 % Absolute return 1.0 % Unaffiliated investment companies 1.6 % Equity 1.6 % U.S. Government 8.8 % Short-term investments and other 0.3 % 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. |
| C000037308 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2010 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLAHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2010 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2010 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2010 Lifetime Portfolio (Class R5/JLAHX) returned 11.74% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2010 Lifetime Portfolio (Class R5/JLAHX) 11.74 % 5.21 % ) 4.72 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2010 Index 12.24 % 5.11 % ) 4.73 % John Hancock 2010 Lifetime Index 12.14 % 5.06 % ) 4.94 % |
| 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 | $ 123,160,458 |
| Holdings Count | Holding | 42 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 24% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.3 % Equity 23.9 % International equity 11.0 % Large blend 6.0 % U.S. large cap 6.0 % U.S. mid cap 0.9 % Fixed income 58.1 % Intermediate bond 28.2 % Short-term bond 11.4 % Multi-sector bond 5.2 % Emerging-market debt 5.2 % Bank loan 4.3 % High yield bond 3.8 % Alternative and specialty 7.3 % Sector equity 6.3 % Absolute return 1.0 % Unaffiliated investment companies 1.6 % Equity 1.6 % U.S. Government 8.8 % Short-term investments and other 0.3 % 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. |
| C000106459 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2010 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLAIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2010 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2010 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2010 Lifetime Portfolio (Class R6/JLAIX) returned 11.77% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2010 Lifetime Portfolio (Class R6/JLAIX) 11.77 % 5.29 % ) 4.79 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2010 Index 12.24 % 5.11 % ) 4.73 % John Hancock 2010 Lifetime Index 12.14 % 5.06 % ) 4.94 % |
| 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 | $ 123,160,458 |
| Holdings Count | Holding | 42 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 24% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 89.3 % Equity 23.9 % International equity 11.0 % Large blend 6.0 % U.S. large cap 6.0 % U.S. mid cap 0.9 % Fixed income 58.1 % Intermediate bond 28.2 % Short-term bond 11.4 % Multi-sector bond 5.2 % Emerging-market debt 5.2 % Bank loan 4.3 % High yield bond 3.8 % Alternative and specialty 7.3 % Sector equity 6.3 % Absolute return 1.0 % Unaffiliated investment companies 1.6 % Equity 1.6 % U.S. Government 8.8 % Short-term investments and other 0.3 % 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. |
| C000037417 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLKOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2050 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class 1/JLKOX) returned 21.47% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class 1/JLKOX) 21.47 % 10.85 % 8.31 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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. |
| Net Assets | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000037407 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLKAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2050 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class A/JLKAX) returned 21.02% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class A/JLKAX) 15.01 % 9.32 % 7.36 % Multimanager 2050 Lifetime Portfolio (Class A/JLKAX)—excluding sales charge 21.02 % 10.44 % 7.91 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000153964 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRPX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2050 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class I/JHRPX) returned 21.37% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class I/JHRPX) 21.37 % 10.77 % 8.25 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000113511 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLKEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2050 Lifetime Portfolio $ 0.50 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.50% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class R2/JLKEX) returned 20.94% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class R2/JLKEX) 20.94 % 10.34 % 7.82 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000037415 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLKGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2050 Lifetime Portfolio $ 0.25 % |
| Expenses Paid, Amount | $ 28 |
| Expense Ratio, Percent | 0.25% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class R4/JLKGX) returned 21.18% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class R4/JLKGX) 21.18 % 10.61 % 8.09 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000037416 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLKHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2050 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class R5/JLKHX) returned 21.42% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class R5/JLKHX) 21.42 % 10.85 % 8.31 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000106467 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2050 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLKRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2050 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2050 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2050 Lifetime Portfolio (Class R6/JLKRX) returned 21.57% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2050 Lifetime Portfolio (Class R6/JLKRX) 21.57 % 10.90 % 8.37 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2050 Index 20.97 % 11.06 % 8.64 % John Hancock 2050 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 613,448,803 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221540 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JAAVX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2065 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class 1/JAAVX) returned 21.48% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class 1/JAAVX) 21.48 % 11.08 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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. |
| Net Assets | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221534 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JAAWX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2065 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class A/JAAWX) returned 21.12% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class A/JAAWX) 15.05 % 9.25 % Multimanager 2065 Lifetime Portfolio (Class A/JAAWX)—excluding sales charge 21.12 % 10.69 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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 | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221535 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JABSX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2065 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class I/JABSX) returned 21.40% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class I/JABSX) 21.40 % 11.03 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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 | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221536 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JAAZX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2065 Lifetime Portfolio $ 0.27 % |
| Expenses Paid, Amount | $ 30 |
| Expense Ratio, Percent | 0.27% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class R2/JAAZX) returned 21.27% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class R2/JAAZX) 21.27 % 10.85 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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 | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221537 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JABBX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2065 Lifetime Portfolio $ 0.16 % |
| Expenses Paid, Amount | $ 18 |
| Expense Ratio, Percent | 0.16% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class R4/JABBX) returned 21.38% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class R4/JABBX) 21.38 % 10.97 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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 | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221538 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JABDX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2065 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class R5/JABDX) returned 21.56% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class R5/JABDX) 21.56 % 11.13 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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 | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000221539 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2065 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JABEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2065 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2065 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2065 Lifetime Portfolio (Class R6/JABEX) returned 21.51% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2065 Lifetime Portfolio (Class R6/JABEX) 21.51 % 11.14 % S&P 500 Index 27.14 % 16.26 % S&P Target Date 2060+ Index 21.09 % 12.02 % John Hancock 2065 Lifetime Index 21.69 % 11.72 % |
| Performance Inception Date | Sep. 23, 2020 |
| 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 | $ 95,517,173 |
| Holdings Count | Holding | 38 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 23% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.7 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.9 % Fixed income 1.4 % Emerging-market debt 0.6 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000037351 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLDOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2020 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class 1/JLDOX) returned 13.47% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class 1/JLDOX) 13.47 % 6.29 % ) 5.55 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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. |
| Net Assets | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000037341 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLDAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2020 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class A/JLDAX) returned 12.92% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class A/JLDAX) 7.28 % 4.81 % ) 4.60 % Multimanager 2020 Lifetime Portfolio (Class A/JLDAX)—excluding sales charge 12.92 % 5.89 % ) 5.15 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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 | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000153958 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRVX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2020 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class I/JHRVX) returned 13.48% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class I/JHRVX) 13.48 % 6.24 % ) 5.46 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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 | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000113505 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLDEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2020 Lifetime Portfolio $ 0.49 % |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.49% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class R2/JLDEX) returned 12.92% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class R2/JLDEX) 12.92 % 5.81 % ) 5.07 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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 | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000037349 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLDGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2020 Lifetime Portfolio $ 0.26 % |
| Expenses Paid, Amount | $ 28 |
| Expense Ratio, Percent | 0.26% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class R4/JLDGX) returned 13.18% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class R4/JLDGX) 13.18 % 6.07 % ) 5.33 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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 | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000037350 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLDHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2020 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class R5/JLDHX) returned 13.45% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class R5/JLDHX) 13.45 % 6.28 % ) 5.54 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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 | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000106461 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2020 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLDIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2020 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2020 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2020 Lifetime Portfolio (Class R6/JLDIX) returned 13.55% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2020 Lifetime Portfolio (Class R6/JLDIX) 13.55 % 6.35 % ) 5.60 % Bloomberg U.S. Aggregate Bond Index 7.30 % (0.04 ) % 1.64 % S&P Target Date 2020 Index 13.74 % 6.01 % ) 5.54 % John Hancock 2020 Lifetime Index 13.79 % 6.15 % ) 6.05 % |
| 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 | $ 438,531,059 |
| Holdings Count | Holding | 49 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 19% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.4 % Equity 35.3 % International equity 14.0 % Large blend 8.9 % U.S. large cap 7.6 % U.S. mid cap 2.7 % Emerging-market equity 1.0 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 46.6 % Intermediate bond 23.9 % Short-term bond 7.2 % Multi-sector bond 4.7 % Emerging-market debt 4.7 % High yield bond 3.4 % Bank loan 2.7 % Alternative and specialty 8.5 % Sector equity 7.5 % Absolute return 1.0 % Unaffiliated investment companies 2.3 % Equity 2.3 % U.S. Government 7.1 % Short-term investments and other 0.2 % 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. |
| C000037384 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLHOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2035 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class 1/JLHOX) returned 18.32% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class 1/JLHOX) 18.32 % 9.19 % 7.41 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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. |
| Net Assets | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000037374 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLHAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2035 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class A/JLHAX) returned 17.78% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class A/JLHAX) 11.86 % 7.67 % 6.47 % Multimanager 2035 Lifetime Portfolio (Class A/JLHAX)—excluding sales charge 17.78 % 8.78 % 7.01 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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 | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000153961 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRMX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2035 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class I/JHRMX) returned 18.23% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class I/JHRMX) 18.23 % 9.09 % 7.28 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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 | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000113508 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLHEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2035 Lifetime Portfolio $ 0.51 % |
| Expenses Paid, Amount | $ 56 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class R2/JLHEX) returned 17.80% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class R2/JLHEX) 17.80 % 8.69 % 6.92 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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 | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000037382 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLHGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2035 Lifetime Portfolio $ 0.22 % |
| Expenses Paid, Amount | $ 24 |
| Expense Ratio, Percent | 0.22% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class R4/JLHGX) returned 18.09% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class R4/JLHGX) 18.09 % 8.99 % 7.19 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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 | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000037383 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLHHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2035 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class R5/JLHHX) returned 18.20% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class R5/JLHHX) 18.20 % 9.18 % 7.39 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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 | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000106464 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2035 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLHIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2035 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2035 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2035 Lifetime Portfolio (Class R6/JLHIX) returned 18.27% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2035 Lifetime Portfolio (Class R6/JLHIX) 18.27 % 9.23 % 7.45 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2035 Index 17.85 % 9.22 % 7.55 % John Hancock 2035 Lifetime Index 18.31 % 9.44 % 8.26 % |
| 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 | $ 1,100,536,141 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.7 % Equity 65.8 % U.S. large cap 19.7 % International equity 19.2 % Large blend 14.7 % U.S. mid cap 6.8 % Emerging-market equity 3.6 % U.S. small cap 1.1 % Sector equity 0.7 % Fixed income 19.7 % Intermediate bond 13.1 % Emerging-market debt 2.8 % High yield bond 2.0 % Short-term bond 1.0 % Multi-sector bond 0.8 % Alternative and specialty 6.2 % Sector equity 5.2 % Absolute return 1.0 % Unaffiliated investment companies 4.5 % Equity 4.5 % U.S. Government 3.7 % Short-term investments and other 0.1 % 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. |
| C000037406 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLJOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2045 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class 1/JLJOX) returned 21.03% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class 1/JLJOX) 21.03 % 10.72 % 8.25 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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. |
| Net Assets | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000037396 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLJAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2045 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class A/JLJAX) returned 20.53% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class A/JLJAX) 14.50 % 9.19 % 7.29 % Multimanager 2045 Lifetime Portfolio (Class A/JLJAX)—excluding sales charge 20.53 % 10.31 % 7.85 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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 | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000153963 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHROX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2045 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class I/JHROX) returned 20.86% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class I/JHROX) 20.86 % 10.67 % 8.14 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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 | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000113510 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLJEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2045 Lifetime Portfolio $ 0.50 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.50% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class R2/JLJEX) returned 20.43% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class R2/JLJEX) 20.43 % 10.20 % 7.76 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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 | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000037404 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLJGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2045 Lifetime Portfolio $ 0.25 % |
| Expenses Paid, Amount | $ 28 |
| Expense Ratio, Percent | 0.25% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class R4/JLJGX) returned 20.60% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class R4/JLJGX) 20.60 % 10.48 % 8.02 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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 | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000037405 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLJHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2045 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class R5/JLJHX) returned 20.84% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class R5/JLJHX) 20.84 % 10.71 % 8.24 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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 | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000106466 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2045 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLJIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2045 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2045 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2045 Lifetime Portfolio (Class R6/JLJIX) returned 20.98% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2045 Lifetime Portfolio (Class R6/JLJIX) 20.98 % 10.76 % 8.29 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2045 Index 20.39 % 10.75 % 8.44 % John Hancock 2045 Lifetime Index 21.05 % 11.32 % 9.22 % |
| 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 | $ 922,601,132 |
| Holdings Count | Holding | 41 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 16% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.6 % Equity 83.2 % U.S. large cap 25.9 % International equity 21.4 % Large blend 18.2 % U.S. mid cap 9.7 % Emerging-market equity 5.4 % U.S. small cap 1.8 % Sector equity 0.8 % Fixed income 4.8 % Intermediate bond 2.4 % Emerging-market debt 1.0 % High yield bond 0.8 % Short-term bond 0.6 % Alternative and specialty 3.6 % Sector equity 2.6 % Absolute return 1.0 % Unaffiliated investment companies 5.9 % Equity 5.9 % U.S. Government 2.3 % Short-term investments and other 0.2 % 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. |
| C000167626 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JRETX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2060 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class 1/JRETX) returned 21.58% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class 1/JRETX) 21.58 % 10.90 % 10.30 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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. |
| Net Assets | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000167627 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JJERX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2060 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class A/JJERX) returned 21.08% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class A/JJERX) 15.05 % 9.34 % 9.22 % Multimanager 2060 Lifetime Portfolio (Class A/JJERX)—excluding sales charge 21.08 % 10.48 % 9.89 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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 | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000167619 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JMENX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2060 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class I/JMENX) returned 21.50% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class I/JMENX) 21.50 % 10.83 % 10.24 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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 | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000167621 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JVIMX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2060 Lifetime Portfolio $ 0.51 % |
| Expenses Paid, Amount | $ 56 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class R2/JVIMX) returned 20.90% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class R2/JVIMX) 20.90 % 10.42 % 9.90 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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 | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000167623 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JROUX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2060 Lifetime Portfolio $ 0.18 % |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.18% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class R4/JROUX) returned 21.36% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class R4/JROUX) 21.36 % 10.74 % 10.16 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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 | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000167624 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JGHTX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2060 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class R5/JGHTX) returned 21.50% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class R5/JGHTX) 21.50 % 10.88 % 10.29 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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 | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000167625 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2060 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JESRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2060 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2060 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2060 Lifetime Portfolio (Class R6/JESRX) returned 21.61% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Since inception Multimanager 2060 Lifetime Portfolio (Class R6/JESRX) 21.61 % 10.94 % 10.35 % S&P 500 Index 27.14 % 15.92 % 14.79 % S&P Target Date 2060+ Index 21.09 % 11.18 % 10.58 % John Hancock 2060 Lifetime Index 21.69 % 11.51 % 11.38 % |
| Performance Inception Date | Mar. 30, 2016 |
| 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 | $ 301,842,719 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.4 % Equity 88.4 % U.S. large cap 27.4 % International equity 21.8 % Large blend 19.3 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.7 % Sector equity 1.7 % Absolute return 1.0 % Unaffiliated investment companies 6.1 % Equity 6.1 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000037362 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLEOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2025 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class 1/JLEOX) returned 14.50% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class 1/JLEOX) 14.50 % 7.21 % 6.19 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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. |
| Net Assets | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000037352 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLEAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2025 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class A/JLEAX) returned 14.15% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class A/JLEAX) 8.44 % 5.72 % 5.26 % Multimanager 2025 Lifetime Portfolio (Class A/JLEAX)—excluding sales charge 14.15 % 6.81 % 5.80 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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 | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000153959 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRNX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2025 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class I/JHRNX) returned 14.54% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class I/JHRNX) 14.54 % 7.13 % 6.10 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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 | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000113506 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLEEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2025 Lifetime Portfolio $ 0.51 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.51% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class R2/JLEEX) returned 13.95% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class R2/JLEEX) 13.95 % 6.71 % 5.71 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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 | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000037360 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLEGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2025 Lifetime Portfolio $ 0.25 % |
| Expenses Paid, Amount | $ 27 |
| Expense Ratio, Percent | 0.25% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class R4/JLEGX) returned 14.25% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class R4/JLEGX) 14.25 % 6.98 % 5.97 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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 | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000037361 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLEHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2025 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class R5/JLEHX) returned 14.50% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class R5/JLEHX) 14.50 % 7.18 % 6.18 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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 | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000106462 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2025 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLEIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2025 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2025 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2025 Lifetime Portfolio (Class R6/JLEIX) returned 14.70% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution Fixed-income allocation also contributed TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2025 Lifetime Portfolio (Class R6/JLEIX) 14.70 % 7.25 % 6.25 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2025 Index 14.30 % 6.91 % 6.14 % John Hancock 2025 Lifetime Index 14.87 % 7.19 % 6.86 % |
| 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 | $ 832,264,138 |
| Holdings Count | Holding | 48 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 90.5 % Equity 41.9 % International equity 15.4 % U.S. large cap 11.1 % Large blend 8.9 % U.S. mid cap 3.8 % Emerging-market equity 1.6 % Sector equity 0.6 % U.S. small cap 0.5 % Fixed income 40.2 % Intermediate bond 21.1 % Short-term bond 5.2 % Multi-sector bond 4.5 % Emerging-market debt 4.3 % High yield bond 3.2 % Bank loan 1.9 % Alternative and specialty 8.4 % Sector equity 7.4 % Absolute return 1.0 % Unaffiliated investment companies 3.0 % Equity 3.0 % U.S. Government 6.3 % Short-term investments and other 0.2 % 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. |
| C000037395 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLIOX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2040 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 5 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class 1/JLIOX) returned 19.68% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class 1/JLIOX) 19.68 % 10.11 % 7.94 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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. |
| Net Assets | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000037385 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLIAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2040 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class A/JLIAX) returned 19.37% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class A/JLIAX) 13.37 % 8.60 % 7.00 % Multimanager 2040 Lifetime Portfolio (Class A/JLIAX)—excluding sales charge 19.37 % 9.71 % 7.55 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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 | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000153962 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRDX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2040 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class I/JHRDX) returned 19.71% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class I/JHRDX) 19.71 % 10.05 % 7.84 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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 | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000113509 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLIEX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2040 Lifetime Portfolio $ 0.50 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.50% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class R2/JLIEX) returned 19.19% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class R2/JLIEX) 19.19 % 9.61 % 7.46 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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 | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000037393 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLIGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2040 Lifetime Portfolio $ 0.25 % |
| Expenses Paid, Amount | $ 27 |
| Expense Ratio, Percent | 0.25% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class R4/JLIGX) returned 19.51% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class R4/JLIGX) 19.51 % 9.89 % 7.73 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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 | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000037394 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLIHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2040 Lifetime Portfolio $ 0.06 % |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.06% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class R5/JLIHX) returned 19.74% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class R5/JLIHX) 19.74 % 10.12 % 7.94 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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 | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000106465 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2040 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLIIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2040 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2040 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2040 Lifetime Portfolio (Class R6/JLIIX) returned 19.88% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2040 Lifetime Portfolio (Class R6/JLIIX) 19.88 % 10.17 % 8.00 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2040 Index 19.44 % 10.17 % 8.10 % John Hancock 2040 Lifetime Index 19.78 % 10.55 % 8.88 % |
| 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 | $ 954,562,948 |
| Holdings Count | Holding | 44 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 17% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 91.3 % Equity 74.7 % U.S. large cap 22.3 % International equity 20.6 % Large blend 17.2 % U.S. mid cap 8.2 % Emerging-market equity 4.2 % U.S. small cap 1.4 % Sector equity 0.8 % Fixed income 11.6 % Intermediate bond 6.9 % Emerging-market debt 1.9 % High yield bond 1.3 % Short-term bond 1.0 % Multi-sector bond 0.5 % Alternative and specialty 5.0 % Sector equity 4.0 % Absolute return 1.0 % Unaffiliated investment companies 5.5 % Equity 5.5 % U.S. Government 3.0 % Short-term investments and other 0.2 % 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. |
| C000138478 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class 1 |
| Trading Symbol | JLKUX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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/underlying-funds |
| Additional Information Phone Number | 800-344-1029 |
| Additional Information Website | jhinvestments.com/underlying-funds |
| 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 Multimanager 2055 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class 1/JLKUX) returned 21.41% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class 1/JLKUX) 21.41 % 10.85 % 8.32 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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. |
| Net Assets | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000138479 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class A |
| Trading Symbol | JLKLX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2055 Lifetime Portfolio $ 0.42 % |
| Expenses Paid, Amount | $ 46 |
| Expense Ratio, Percent | 0.42% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class A/JLKLX) returned 21.10% (excluding sales charges) for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class A/JLKLX) 15.00 % 9.33 % 7.36 % Multimanager 2055 Lifetime Portfolio (Class A/JLKLX)—excluding sales charge 21.10 % 10.45 % 7.92 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000153974 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class I |
| Trading Symbol | JHRTX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2055 Lifetime Portfolio $ 0.12 % |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.12% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class I/JHRTX) returned 21.45% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class I/JHRTX) 21.45 % 10.78 % 8.22 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000138473 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class R2 |
| Trading Symbol | JLKNX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2055 Lifetime Portfolio $ 0.50 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.50% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class R2/JLKNX) returned 20.92% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class R2/JLKNX) 20.92 % 10.33 % 7.89 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000138475 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class R4 |
| Trading Symbol | JLKQX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2055 Lifetime Portfolio $ 0.16 % |
| Expenses Paid, Amount | $ 18 |
| Expense Ratio, Percent | 0.16% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class R4/JLKQX) returned 21.33% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class R4/JLKQX) 21.33 % 10.73 % 8.20 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000138476 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class R5 |
| Trading Symbol | JLKSX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2055 Lifetime Portfolio $ 0.05 % |
| Expenses Paid, Amount | $ 6 |
| Expense Ratio, Percent | 0.05% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class R5/JLKSX) returned 21.49% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class R5/JLKSX) 21.49 % 10.85 % 8.32 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| C000138477 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Multimanager 2055 Lifetime Portfolio |
| Class Name | Class R6 |
| Trading Symbol | JLKTX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the John Hancock Multimanager 2055 Lifetime Portfolio (the fund) for the period of September 1, 2023 to August 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 Multimanager 2055 Lifetime Portfolio $ 0.01 % |
| Expenses Paid, Amount | $ 1 |
| Expense Ratio, Percent | 0.01% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Multimanager 2055 Lifetime Portfolio (Class R6/JLKTX) returned 21.55% for the year ended August 31, 2024. Stocks rallied as falling inflation raised hopes that the U.S. Federal Reserve would start cutting interest rates. Positive global growth, steady corporate earnings, and excitement surrounding the adoption of AI added to the upbeat tone. In this environment, U.S. equities, the growth style, and the information technology sector outpaced the market as a whole. Bonds also produced gains, with income accounting for the majority of the category’s total return. Credit-oriented categories generally outperformed those with higher interest-rate sensitivity. TOP PERFORMANCE CONTRIBUTORS The equity allocation made the largest contribution U.S. large cap funds were the top contributor in equities TOP PERFORMANCE DETRACTORS U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) The absolute return portfolio 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 Multimanager 2055 Lifetime Portfolio (Class R6/JLKTX) 21.55 % 10.89 % 8.36 % S&P 500 Index 27.14 % 15.92 % 12.98 % S&P Target Date 2055 Index 21.05 % 11.14 % 8.71 % John Hancock 2055 Lifetime Index 21.69 % 11.51 % 9.32 % |
| 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 | $ 423,216,348 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 22% |
| 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 table below shows the investment makeup of the fund, representing percentage of the total net assets of the fund. Asset Allocation Affiliated investment companies 92.3 % Equity 88.4 % U.S. large cap 27.5 % International equity 21.8 % Large blend 19.2 % U.S. mid cap 10.7 % Emerging-market equity 6.4 % U.S. small cap 2.0 % Sector equity 0.8 % Fixed income 1.3 % Emerging-market debt 0.5 % High yield bond 0.4 % Short-term bond 0.4 % Alternative and specialty 2.6 % Sector equity 1.6 % Absolute return 1.0 % Unaffiliated investment companies 6.2 % Equity 6.2 % U.S. Government 1.3 % Short-term investments and other 0.2 % 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. |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 47 Months Ended | 60 Months Ended | 101 Months Ended | 120 Months Ended | ||||||||||||
| Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2023 | Aug. 31, 2022 | Aug. 31, 2021 | Sep. 23, 2020 | Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2016 | Mar. 30, 2016 | Aug. 31, 2015 | Aug. 31, 2014 | |
| C000037340 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class 1/JLBOX) | ||||||||||||||||
| Account Value | $ 16,420.087972 | $ 16,420.087972 | $ 16,420.087972 | $ 16,420.087972 | $ 16,420.087972 | $ 14,588.954605 | $ 13,896.314223 | $ 15,708.053818 | $ 13,695.619729 | $ 12,429.432451 | $ 11,918.810925 | $ 11,371.479445 | $ 10,399.902842 | $ 9,723.3591 | $ 10,000 | ||
| Average Annual Return, Percent | 12.55% | 5.73% | 5.08% | ||||||||||||||
| C000037330 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class A/JLBAX) | ||||||||||||||||
| Account Value | $ 15,031.652322 | 15,031.652322 | $ 15,031.652322 | 15,031.652322 | $ 15,031.652322 | 13,402.903838 | 12,819.129525 | 14,545.060514 | 12,710.766385 | 11,592.764469 | 11,162.649608 | 10,677.491004 | 9,812.688827 | 9,202.486315 | 9,500 | ||
| Average Annual Return, Percent | 6.56% | 4.26% | 4.16% | ||||||||||||||
| C000037330 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class A/JLBAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 12.15% | 5.33% | 4.70% | ||||||||||||||
| C000153957 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class I/JHREX) | ||||||||||||||||
| Account Value | $ 406,064.458879 | 406,064.458879 | $ 406,064.458879 | 406,064.458879 | $ 406,064.458879 | 361,034.887931 | 344,109.464741 | 389,674.047181 | 339,636.8215 | 308,836.585853 | 296,351.970787 | 282,637.675689 | 258,656.801762 | 241,788.4725 | 250,000 | ||
| Average Annual Return, Percent | 12.47% | 5.63% | 4.97% | ||||||||||||||
| C000113504 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class R2/JLBKX) | ||||||||||||||||
| Account Value | $ 15,690.3076 | 15,690.3076 | $ 15,690.3076 | 15,690.3076 | $ 15,690.3076 | 13,989.778781 | 13,391.551782 | 15,223.264954 | 13,301.260365 | 12,145.339906 | 11,692.267127 | 11,225.448866 | 10,310.153825 | 9,677.4082 | 10,000 | ||
| Average Annual Return, Percent | 12.16% | 5.26% | 4.61% | ||||||||||||||
| C000037338 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class R4/JLBGX) | ||||||||||||||||
| Account Value | $ 16,242.307368 | 16,242.307368 | $ 16,242.307368 | 16,242.307368 | $ 16,242.307368 | 14,427.107078 | 13,767.045135 | 15,583.159882 | 13,518.678311 | 12,306.206038 | 11,826.347381 | 11,303.999403 | 10,366.771805 | 9,702.1755 | 10,000 | ||
| Average Annual Return, Percent | 12.58% | 5.71% | 4.97% | ||||||||||||||
| C000037339 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class R5/JLBHX) | ||||||||||||||||
| Account Value | $ 16,391.204989 | 16,391.204989 | $ 16,391.204989 | 16,391.204989 | $ 16,391.204989 | 14,563.088284 | 13,872.140678 | 15,702.27489 | 13,678.011168 | 12,428.173401 | 11,918.846753 | 11,371.524477 | 10,399.902842 | 9,723.3591 | 10,000 | ||
| Average Annual Return, Percent | 12.55% | 5.69% | 5.07% | ||||||||||||||
| C000106460 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2015 Lifetime Portfolio (Class R6/JLBJX) | ||||||||||||||||
| Account Value | $ 1,651,107.99892 | 1,651,107.99892 | $ 1,651,107.99892 | 1,651,107.99892 | $ 1,651,107.99892 | 1,464,640.137302 | 1,396,299.421066 | 1,577,502.548251 | 1,373,390.45385 | 1,245,835.013115 | 1,195,250.792378 | 1,138,752.574127 | 1,041,970.613308 | 972,812.57 | 1,000,000 | ||
| Average Annual Return, Percent | 12.73% | 5.79% | 5.14% | ||||||||||||||
| C000037373 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class 1/JLFOX) | ||||||||||||||||
| Account Value | $ 19,361.576358 | 19,361.576358 | $ 19,361.576358 | 19,361.576358 | $ 19,361.576358 | 16,622.840965 | 15,528.303348 | 18,514.986566 | 15,063.571749 | 13,049.92364 | 12,904.977514 | 11,830.069482 | 10,350.770758 | 9,637.0401 | 10,000 | ||
| Average Annual Return, Percent | 16.48% | 8.21% | 6.83% | ||||||||||||||
| C000037363 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class A/JLFAX) | ||||||||||||||||
| Account Value | $ 17,723.656557 | 17,723.656557 | $ 17,723.656557 | 17,723.656557 | $ 17,723.656557 | 15,276.683262 | 14,335.824801 | 17,135.392762 | 14,002.853478 | 12,168.816859 | 12,085.8618 | 11,109.651093 | 9,759.110097 | 9,121.912065 | 9,500 | ||
| Average Annual Return, Percent | 10.21% | 6.71% | 5.89% | ||||||||||||||
| C000037363 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class A/JLFAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 16.02% | 7.81% | 6.43% | ||||||||||||||
| C000153960 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class I/JHRGX) | ||||||||||||||||
| Account Value | $ 479,688.11823 | 479,688.11823 | $ 479,688.11823 | 479,688.11823 | $ 479,688.11823 | 411,703.806294 | 385,346.22832 | 459,335.756352 | 373,923.941253 | 323,901.27038 | 320,815.998959 | 294,289.561863 | 257,660.151544 | 239,847.065 | 250,000 | ||
| Average Annual Return, Percent | 16.51% | 8.17% | 6.73% | ||||||||||||||
| C000113507 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class R2/JLFEX) | ||||||||||||||||
| Account Value | $ 18,496.609002 | 18,496.609002 | $ 18,496.609002 | 18,496.609002 | $ 18,496.609002 | 15,947.335144 | 14,988.793693 | 17,929.049095 | 14,661.497097 | 12,748.940224 | 12,675.580051 | 11,665.895082 | 10,256.937615 | 9,592.0421 | 10,000 | ||
| Average Annual Return, Percent | 15.99% | 7.73% | 6.34% | ||||||||||||||
| C000037371 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class R4/JLFGX) | ||||||||||||||||
| Account Value | $ 18,970.937662 | 18,970.937662 | $ 18,970.937662 | 18,970.937662 | $ 18,970.937662 | 16,327.93007 | 15,286.111557 | 18,257.247659 | 14,883.587063 | 12,916.18588 | 12,805.760653 | 11,761.450091 | 10,317.823192 | 9,625.1882 | 10,000 | ||
| Average Annual Return, Percent | 16.19% | 7.99% | 6.61% | ||||||||||||||
| C000037372 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class R5/JLFHX) | ||||||||||||||||
| Account Value | $ 19,344.511423 | 19,344.511423 | $ 19,344.511423 | 19,344.511423 | $ 19,344.511423 | 16,607.030446 | 15,529.720678 | 18,503.992916 | 15,053.238622 | 13,040.445133 | 12,907.594874 | 11,821.618013 | 10,351.385023 | 9,637.0401 | 10,000 | ||
| Average Annual Return, Percent | 16.48% | 8.21% | 6.82% | ||||||||||||||
| C000106463 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2030 Lifetime Portfolio (Class R6/JLFIX) | ||||||||||||||||
| Account Value | $ 1,944,613.014036 | 1,944,613.014036 | $ 1,944,613.014036 | 1,944,613.014036 | $ 1,944,613.014036 | 1,668,658.684248 | 1,559,580.821782 | 1,857,249.011201 | 1,510,154.129068 | 1,307,509.325545 | 1,293,339.779456 | 1,183,973.809888 | 1,036,214.012691 | 964,217.52 | 1,000,000 | ||
| Average Annual Return, Percent | 16.54% | 8.26% | 6.88% | ||||||||||||||
| C000037309 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class 1/JLAOX) | ||||||||||||||||
| Account Value | $ 15,866.069805 | 15,866.069805 | $ 15,866.069805 | 15,866.069805 | $ 15,866.069805 | 14,199.47107 | 13,569.482471 | 15,123.091751 | 13,383.393764 | 12,289.657054 | 11,713.261623 | 11,273.584608 | 10,415.583425 | 9,739.1539 | 10,000 | ||
| Average Annual Return, Percent | 11.74% | 5.24% | 4.72% | ||||||||||||||
| C000037307 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class A/JLAAX) | ||||||||||||||||
| Account Value | $ 14,536.761653 | 14,536.761653 | $ 14,536.761653 | 14,536.761653 | $ 14,536.761653 | 13,071.570375 | 12,523.942576 | 14,012.253053 | 12,442.321158 | 11,467.182358 | 10,973.356305 | 10,587.41966 | 9,829.130546 | 9,217.56519 | 9,500 | ||
| Average Annual Return, Percent | 5.61% | 3.78% | 3.81% | ||||||||||||||
| C000037307 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class A/JLAAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 11.21% | 4.86% | 4.35% | ||||||||||||||
| C000153956 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class I/JHRLX) | ||||||||||||||||
| Account Value | $ 393,124.257563 | 393,124.257563 | $ 393,124.257563 | 393,124.257563 | $ 393,124.257563 | 351,563.723126 | 336,585.390516 | 374,977.373953 | 332,057.283243 | 305,490.907963 | 290,999.247297 | 280,243.612355 | 259,086.52151 | 242,435.29 | 250,000 | ||
| Average Annual Return, Percent | 11.82% | 5.17% | 4.63% | ||||||||||||||
| C000113503 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class R2/JLAEX) | ||||||||||||||||
| Account Value | $ 15,184.759066 | 15,184.759066 | $ 15,184.759066 | 15,184.759066 | $ 15,184.759066 | 13,645.972358 | 13,104.910319 | 14,657.195074 | 13,017.387367 | 12,018.598005 | 11,499.970496 | 11,116.971377 | 10,317.304354 | 9,702.7002 | 10,000 | ||
| Average Annual Return, Percent | 11.28% | 4.79% | 4.27% | ||||||||||||||
| C000037308 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class R5/JLAHX) | ||||||||||||||||
| Account Value | $ 15,859.429749 | 15,859.429749 | $ 15,859.429749 | 15,859.429749 | $ 15,859.429749 | 14,192.779082 | 13,563.620378 | 15,121.385939 | 13,382.463541 | 12,302.650891 | 11,712.938521 | 11,273.380726 | 10,425.418665 | 9,748.3504 | 10,000 | ||
| Average Annual Return, Percent | 11.74% | 5.21% | 4.72% | ||||||||||||||
| C000106459 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2010 Lifetime Portfolio (Class R6/JLAIX) | ||||||||||||||||
| Account Value | $ 1,596,101.253284 | 1,596,101.253284 | $ 1,596,101.253284 | 1,596,101.253284 | $ 1,596,101.253284 | 1,428,042.270093 | 1,364,017.589626 | 1,519,263.381534 | 1,342,474.641245 | 1,233,574.000658 | 1,173,783.309951 | 1,129,168.300841 | 1,042,688.835761 | 974,394.7 | 1,000,000 | ||
| Average Annual Return, Percent | 11.77% | 5.29% | 4.79% | ||||||||||||||
| C000037417 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class 1/JLKOX) | ||||||||||||||||
| Account Value | $ 22,213.857259 | 22,213.857259 | $ 22,213.857259 | 22,213.857259 | $ 22,213.857259 | 18,287.727721 | 16,521.677084 | 20,211.831875 | 15,619.922029 | 13,272.425931 | 13,401.813877 | 12,025.837512 | 10,351.147775 | 9,614.1618 | 10,000 | ||
| Average Annual Return, Percent | 21.47% | 10.85% | 8.31% | ||||||||||||||
| C000037407 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class A/JLKAX) | ||||||||||||||||
| Account Value | $ 20,334.679293 | 20,334.679293 | $ 20,334.679293 | 20,334.679293 | $ 20,334.679293 | 16,802.674315 | 15,227.316593 | 18,697.506715 | 14,503.262987 | 12,374.568651 | 12,541.716623 | 11,298.639004 | 9,751.17123 | 9,099.777065 | 9,500 | ||
| Average Annual Return, Percent | 15.01% | 9.32% | 7.36% | ||||||||||||||
| C000037407 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class A/JLKAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 21.02% | 10.44% | 7.91% | ||||||||||||||
| C000153964 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class I/JHRPX) | ||||||||||||||||
| Account Value | $ 552,249.690929 | 552,249.690929 | $ 552,249.690929 | 552,249.690929 | $ 552,249.690929 | 455,007.656763 | 411,059.386343 | 503,188.778302 | 389,095.779316 | 331,166.806526 | 334,370.949588 | 300,453.545085 | 258,583.872073 | 240,354.52 | 250,000 | ||
| Average Annual Return, Percent | 21.37% | 10.77% | 8.25% | ||||||||||||||
| C000113511 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class R2/JLKEX) | ||||||||||||||||
| Account Value | $ 21,236.877377 | 21,236.877377 | $ 21,236.877377 | 21,236.877377 | $ 21,236.877377 | 17,560.050271 | 15,930.034934 | 19,580.36931 | 15,205.078834 | 12,982.554998 | 13,172.701762 | 11,876.308295 | 10,257.090544 | 9,578.7127 | 10,000 | ||
| Average Annual Return, Percent | 20.94% | 10.34% | 7.82% | ||||||||||||||
| C000037415 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class R4/JLKGX) | ||||||||||||||||
| Account Value | $ 21,769.242685 | 21,769.242685 | $ 21,769.242685 | 21,769.242685 | $ 21,769.242685 | 17,964.495183 | 16,265.46446 | 19,931.012922 | 15,431.804562 | 13,148.480243 | 13,299.33056 | 11,963.069674 | 10,314.761858 | 9,603.3062 | 10,000 | ||
| Average Annual Return, Percent | 21.18% | 10.61% | 8.09% | ||||||||||||||
| C000037416 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class R5/JLKHX) | ||||||||||||||||
| Account Value | $ 22,213.185498 | 22,213.185498 | $ 22,213.185498 | 22,213.185498 | $ 22,213.185498 | 18,294.95318 | 16,530.618751 | 20,205.224535 | 15,618.931356 | 13,273.353745 | 13,414.39755 | 12,036.811659 | 10,350.749415 | 9,614.8554 | 10,000 | ||
| Average Annual Return, Percent | 21.42% | 10.85% | 8.31% | ||||||||||||||
| C000106467 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2050 Lifetime Portfolio (Class R6/JLKRX) | ||||||||||||||||
| Account Value | $ 2,233,275.801299 | 2,233,275.801299 | $ 2,233,275.801299 | 2,233,275.801299 | $ 2,233,275.801299 | 1,837,063.268023 | 1,659,016.145575 | 2,028,147.014869 | 1,567,343.44865 | 1,331,443.462045 | 1,343,540.350036 | 1,205,167.84675 | 1,036,146.224483 | 962,789.43 | 1,000,000 | ||
| Average Annual Return, Percent | 21.57% | 10.90% | 8.37% | ||||||||||||||
| C000221540 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class 1/JAAVX) | ||||||||||||||||
| Account Value | $ 15,129.688523 | $ 15,129.688523 | $ 15,129.688523 | 15,129.688523 | $ 15,129.688523 | 12,454.614035 | 11,244.953257 | 13,741.3365 | $ 10,000 | ||||||||
| Average Annual Return, Percent | 21.48% | 11.08% | |||||||||||||||
| C000221534 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class A/JAAWX) | ||||||||||||||||
| Account Value | $ 14,174.589414 | $ 14,174.589414 | 14,174.589414 | 14,174.589414 | 14,174.589414 | 11,703.152537 | 10,604.991653 | 13,013.364955 | 9,500 | ||||||||
| Average Annual Return, Percent | 15.05% | 9.25% | |||||||||||||||
| C000221534 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class A/JAAWX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 21.12% | 10.69% | |||||||||||||||
| C000221535 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class I/JABSX) | ||||||||||||||||
| Account Value | $ 377,484.597512 | $ 377,484.597512 | 377,484.597512 | 377,484.597512 | 377,484.597512 | 310,940.698003 | 280,658.311686 | 343,482.375 | 250,000 | ||||||||
| Average Annual Return, Percent | 21.40% | 11.03% | |||||||||||||||
| C000221536 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class R2/JAAZX) | ||||||||||||||||
| Account Value | $ 15,008.246858 | $ 15,008.246858 | 15,008.246858 | 15,008.246858 | 15,008.246858 | 12,376.20513 | 11,195.375983 | 13,713.9408 | 10,000 | ||||||||
| Average Annual Return, Percent | 21.27% | 10.85% | |||||||||||||||
| C000221537 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class R4/JABBX) | ||||||||||||||||
| Account Value | $ 15,071.932203 | $ 15,071.932203 | 15,071.932203 | 15,071.932203 | 15,071.932203 | 12,416.808535 | 11,220.850053 | 13,727.84 | 10,000 | ||||||||
| Average Annual Return, Percent | 21.38% | 10.97% | |||||||||||||||
| C000221538 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class R5/JABDX) | ||||||||||||||||
| Account Value | $ 15,156.251878 | $ 15,156.251878 | 15,156.251878 | 15,156.251878 | 15,156.251878 | 12,468.293932 | 11,251.40914 | 13,752.795 | 10,000 | ||||||||
| Average Annual Return, Percent | 21.56% | 11.13% | |||||||||||||||
| C000221539 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2065 Lifetime Portfolio (Class R6/JABEX) | ||||||||||||||||
| Account Value | $ 1,515,905.768603 | $ 1,515,905.768603 | 1,515,905.768603 | 1,515,905.768603 | 1,515,905.768603 | 1,247,592.22251 | 1,125,011.802742 | 1,375,279.5 | 1,000,000 | ||||||||
| Average Annual Return, Percent | 21.51% | 11.14% | |||||||||||||||
| C000037351 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class 1/JLDOX) | ||||||||||||||||
| Account Value | $ 17,157.19903 | $ 17,157.19903 | $ 17,157.19903 | 17,157.19903 | $ 17,157.19903 | 15,120.54654 | 14,373.588106 | 16,490.331026 | 14,132.278043 | 12,646.85848 | 12,240.94815 | 11,516.097453 | 10,389.601765 | 9,696.825 | 10,000 | ||
| Average Annual Return, Percent | 13.47% | 6.29% | 5.55% | ||||||||||||||
| C000037341 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class A/JLDAX) | ||||||||||||||||
| Account Value | $ 15,690.31848 | 15,690.31848 | $ 15,690.31848 | 15,690.31848 | $ 15,690.31848 | 13,895.08835 | 13,264.172038 | 15,258.622987 | 13,120.97353 | 11,786.613174 | 11,455.953905 | 10,815.524109 | 9,795.085785 | 9,178.507175 | 9,500 | ||
| Average Annual Return, Percent | 7.28% | 4.81% | 4.60% | ||||||||||||||
| C000037341 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class A/JLDAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 12.92% | 5.89% | 5.15% | ||||||||||||||
| C000153958 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class I/JHRVX) | ||||||||||||||||
| Account Value | $ 425,593.176603 | 425,593.176603 | $ 425,593.176603 | 425,593.176603 | $ 425,593.176603 | 375,027.151884 | 357,255.471318 | 409,624.280727 | 351,388.523659 | 314,440.036496 | 304,589.930158 | 286,732.696654 | 258,869.128982 | 241,569.145 | 250,000 | ||
| Average Annual Return, Percent | 13.48% | 6.24% | 5.46% | ||||||||||||||
| C000113505 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class R2/JLDEX) | ||||||||||||||||
| Account Value | $ 16,391.262765 | 16,391.262765 | $ 16,391.262765 | 16,391.262765 | $ 16,391.262765 | 14,515.549135 | 13,884.561224 | 15,982.30583 | 13,754.503481 | 12,358.284184 | 12,024.819817 | 11,371.702784 | 10,303.357346 | 9,659.902 | 10,000 | ||
| Average Annual Return, Percent | 12.92% | 5.81% | 5.07% | ||||||||||||||
| C000037349 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class R4/JLDGX) | ||||||||||||||||
| Account Value | $ 16,813.703293 | 16,813.703293 | $ 16,813.703293 | 16,813.703293 | $ 16,813.703293 | 14,855.844425 | 14,151.833315 | 16,265.531113 | 13,955.253063 | 12,520.999379 | 12,148.359035 | 11,449.313095 | 10,357.044665 | 9,684.856 | 10,000 | ||
| Average Annual Return, Percent | 13.18% | 6.07% | 5.33% | ||||||||||||||
| C000037350 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class R5/JLDHX) | ||||||||||||||||
| Account Value | $ 17,142.937174 | 17,142.937174 | $ 17,142.937174 | 17,142.937174 | $ 17,142.937174 | 15,110.044482 | 14,381.998521 | 16,483.944406 | 14,128.011587 | 12,644.210682 | 12,240.992985 | 11,516.129557 | 10,389.601765 | 9,696.825 | 10,000 | ||
| Average Annual Return, Percent | 13.45% | 6.28% | 5.54% | ||||||||||||||
| C000106461 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2020 Lifetime Portfolio (Class R6/JLDIX) | ||||||||||||||||
| Account Value | $ 1,723,875.394417 | 1,723,875.394417 | $ 1,723,875.394417 | 1,723,875.394417 | $ 1,723,875.394417 | 1,518,200.024415 | 1,444,092.298037 | 1,654,673.947787 | 1,417,032.387546 | 1,267,218.156775 | 1,226,939.238443 | 1,153,579.376743 | 1,040,034.672959 | 971,037.66 | 1,000,000 | ||
| Average Annual Return, Percent | 13.55% | 6.35% | 5.60% | ||||||||||||||
| C000037384 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class 1/JLHOX) | ||||||||||||||||
| Account Value | $ 20,442.820679 | 20,442.820679 | $ 20,442.820679 | 20,442.820679 | $ 20,442.820679 | 17,277.816224 | 15,989.476173 | 19,296.481277 | 15,357.79065 | 13,170.020664 | 13,183.445498 | 11,936.422061 | 10,335.726183 | 9,614.3954 | 10,000 | ||
| Average Annual Return, Percent | 18.32% | 9.19% | 7.41% | ||||||||||||||
| C000037374 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class A/JLHAX) | ||||||||||||||||
| Account Value | $ 18,706.781154 | 18,706.781154 | $ 18,706.781154 | 18,706.781154 | $ 18,706.781154 | 15,883.083679 | 14,751.212932 | 17,855.870443 | 14,272.979608 | 12,282.118882 | 12,338.636996 | 11,211.9044 | 9,745.400544 | 9,097.8346 | 9,500 | ||
| Average Annual Return, Percent | 11.86% | 7.67% | 6.47% | ||||||||||||||
| C000037374 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class A/JLHAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 17.78% | 8.78% | 7.01% | ||||||||||||||
| C000153961 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class I/JHRMX) | ||||||||||||||||
| Account Value | $ 504,987.668213 | 504,987.668213 | $ 504,987.668213 | 504,987.668213 | $ 504,987.668213 | 427,116.183127 | 395,889.786353 | 478,067.950838 | 380,850.829385 | 326,913.212499 | 327,499.715364 | 296,923.420422 | 257,275.730443 | 239,490.0275 | 250,000 | ||
| Average Annual Return, Percent | 18.23% | 9.09% | 7.28% | ||||||||||||||
| C000113508 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class R2/JLHEX) | ||||||||||||||||
| Account Value | $ 19,527.449771 | 19,527.449771 | $ 19,527.449771 | 19,527.449771 | $ 19,527.449771 | 16,576.71635 | 15,421.918038 | 18,698.088463 | 14,947.919811 | 12,871.490456 | 12,945.789579 | 11,778.065522 | 10,250.058634 | 9,569.6501 | 10,000 | ||
| Average Annual Return, Percent | 17.80% | 8.69% | 6.92% | ||||||||||||||
| C000037382 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class R4/JLHGX) | ||||||||||||||||
| Account Value | $ 20,028.098759 | 20,028.098759 | $ 20,028.098759 | 20,028.098759 | $ 20,028.098759 | 16,959.925742 | 15,732.648135 | 19,004.286171 | 15,163.543238 | 13,024.304259 | 13,072.096104 | 11,865.853863 | 10,302.432618 | 9,594.3342 | 10,000 | ||
| Average Annual Return, Percent | 18.09% | 8.99% | 7.19% | ||||||||||||||
| C000037383 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class R5/JLHHX) | ||||||||||||||||
| Account Value | $ 20,409.445634 | 20,409.445634 | $ 20,409.445634 | 20,409.445634 | $ 20,409.445634 | 17,267.552179 | 15,981.672558 | 19,288.891966 | 15,352.975036 | 13,155.086353 | 13,172.859438 | 11,936.473 | 10,344.737275 | 9,614.3954 | 10,000 | ||
| Average Annual Return, Percent | 18.20% | 9.18% | 7.39% | ||||||||||||||
| C000106464 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2035 Lifetime Portfolio (Class R6/JLHIX) | ||||||||||||||||
| Account Value | $ 2,051,539.724532 | 2,051,539.724532 | $ 2,051,539.724532 | 2,051,539.724532 | $ 2,051,539.724532 | 1,734,579.420011 | 1,604,405.068203 | 1,935,681.348818 | 1,539,605.293177 | 1,319,502.804188 | 1,320,098.155255 | 1,194,586.921251 | 1,034,652.562924 | 961,902.85 | 1,000,000 | ||
| Average Annual Return, Percent | 18.27% | 9.23% | 7.45% | ||||||||||||||
| C000037406 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class 1/JLJOX) | ||||||||||||||||
| Account Value | $ 22,092.499396 | 22,092.499396 | $ 22,092.499396 | 22,092.499396 | $ 22,092.499396 | 18,254.303534 | 16,546.081452 | 20,212.565675 | 15,617.855762 | 13,274.940533 | 13,402.389213 | 12,018.453371 | 10,336.489113 | 9,609.54 | 10,000 | ||
| Average Annual Return, Percent | 21.03% | 10.72% | 8.25% | ||||||||||||||
| C000037396 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class A/JLJAX) | ||||||||||||||||
| Account Value | $ 20,224.235775 | 20,224.235775 | $ 20,224.235775 | 20,224.235775 | $ 20,224.235775 | 16,779.069893 | 15,259.242753 | 18,703.490764 | 14,506.624155 | 12,383.258414 | 12,545.306642 | 11,289.509171 | 9,746.21082 | 9,093.23337 | 9,500 | ||
| Average Annual Return, Percent | 14.50% | 9.19% | 7.29% | ||||||||||||||
| C000037396 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class A/JLJAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 20.53% | 10.31% | 7.85% | ||||||||||||||
| C000153963 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class I/JHROX) | ||||||||||||||||
| Account Value | $ 546,977.248313 | 546,977.248313 | $ 546,977.248313 | 546,977.248313 | $ 546,977.248313 | 452,552.555793 | 410,022.396395 | 501,422.067076 | 387,850.857562 | 329,522.481784 | 333,260.471198 | 299,235.731686 | 257,525.937271 | 239,370.3475 | 250,000 | ||
| Average Annual Return, Percent | 20.86% | 10.67% | 8.14% | ||||||||||||||
| C000113510 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class R2/JLJEX) | ||||||||||||||||
| Account Value | $ 21,105.456479 | 21,105.456479 | $ 21,105.456479 | 21,105.456479 | $ 21,105.456479 | 17,525.347913 | 15,964.114506 | 19,582.242647 | 15,202.942008 | 12,985.429442 | 13,164.85296 | 11,870.699453 | 10,251.130076 | 9,564.3489 | 10,000 | ||
| Average Annual Return, Percent | 20.43% | 10.20% | 7.76% | ||||||||||||||
| C000037404 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class R4/JLJGX) | ||||||||||||||||
| Account Value | $ 21,636.164549 | 21,636.164549 | $ 21,636.164549 | 21,636.164549 | $ 21,636.164549 | 17,940.790344 | 16,275.223666 | 19,932.985264 | 15,431.0511 | 13,145.820901 | 13,295.653476 | 11,953.195364 | 10,304.163952 | 9,588.3922 | 10,000 | ||
| Average Annual Return, Percent | 20.60% | 10.48% | 8.02% | ||||||||||||||
| C000037405 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class R5/JLJHX) | ||||||||||||||||
| Account Value | $ 22,066.500963 | 22,066.500963 | $ 22,066.500963 | 22,066.500963 | $ 22,066.500963 | 18,261.222792 | 16,540.078139 | 20,201.400833 | 15,616.902957 | 13,266.908181 | 13,399.203745 | 12,026.38126 | 10,336.171791 | 9,609.8727 | 10,000 | ||
| Average Annual Return, Percent | 20.84% | 10.71% | 8.24% | ||||||||||||||
| C000106466 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2045 Lifetime Portfolio (Class R6/JLJIX) | ||||||||||||||||
| Account Value | $ 2,217,023.155367 | 2,217,023.155367 | $ 2,217,023.155367 | 2,217,023.155367 | $ 2,217,023.155367 | 1,832,539.567949 | 1,660,149.615295 | 2,027,611.448239 | 1,565,759.023648 | 1,330,076.209592 | 1,342,081.788813 | 1,203,826.190984 | 1,034,779.286573 | 960,605.82 | 1,000,000 | ||
| Average Annual Return, Percent | 20.98% | 10.76% | 8.29% | ||||||||||||||
| C000167626 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class 1/JRETX) | ||||||||||||||||
| Account Value | $ 22,833.748004 | 22,833.748004 | $ 22,833.748004 | $ 22,833.748004 | $ 22,833.748004 | 18,780.46256 | 16,956.416879 | 20,743.48326 | 16,016.133197 | 13,612.016888 | 13,738.634063 | 12,329.797273 | 10,620 | $ 10,000 | |||
| Average Annual Return, Percent | 21.58% | 10.90% | 10.30% | ||||||||||||||
| C000167627 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class A/JJERX) | ||||||||||||||||
| Account Value | $ 21,022.961264 | 21,022.961264 | $ 21,022.961264 | $ 21,022.961264 | 21,022.961264 | 17,362.426335 | 15,734.746006 | 19,323.00766 | 14,971.194358 | 12,774.090408 | 12,941.901837 | 11,651.210244 | 10,079.5 | 9,500 | |||
| Average Annual Return, Percent | 15.05% | 9.34% | 9.22% | ||||||||||||||
| C000167627 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class A/JJERX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 21.08% | 10.48% | 9.89% | ||||||||||||||
| C000167619 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class I/JMENX) | ||||||||||||||||
| Account Value | $ 568,161.394869 | 568,161.394869 | $ 568,161.394869 | $ 568,161.394869 | 568,161.394869 | 467,614.318745 | 422,466.925986 | 516,850.474494 | 399,493.40904 | 339,712.339804 | 343,367.077167 | 308,088.799245 | 265,500 | 250,000 | |||
| Average Annual Return, Percent | 21.50% | 10.83% | 10.24% | ||||||||||||||
| C000167621 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class R2/JVIMX) | ||||||||||||||||
| Account Value | $ 22,146.014199 | 22,146.014199 | $ 22,146.014199 | $ 22,146.014199 | 22,146.014199 | 18,317.653701 | 16,604.587018 | 20,411.899159 | 15,820.809304 | 13,494.086339 | 13,668.149402 | 12,299.476454 | 10,610 | 10,000 | |||
| Average Annual Return, Percent | 20.90% | 10.42% | 9.90% | ||||||||||||||
| C000167623 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class R4/JROUX) | ||||||||||||||||
| Account Value | $ 22,589.985902 | 22,589.985902 | $ 22,589.985902 | $ 22,589.985902 | 22,589.985902 | 18,614.570849 | 16,830.939016 | 20,616.1466179999 | 15,936.032757 | 13,566.062064 | 13,703.590753 | 12,308.609842 | 10,620 | 10,000 | |||
| Average Annual Return, Percent | 21.36% | 10.74% | 10.16% | ||||||||||||||
| C000167624 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class R5/JGHTX) | ||||||||||||||||
| Account Value | $ 22,818.604444 | 22,818.604444 | $ 22,818.604444 | $ 22,818.604444 | 22,818.604444 | 18,780.307582 | 16,970.350006 | 20,748.667908 | 16,018.555162 | 13,613.550599 | 13,745.890396 | 12,342.615932 | 10,620 | 10,000 | |||
| Average Annual Return, Percent | 21.50% | 10.88% | 10.29% | ||||||||||||||
| C000167625 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2060 Lifetime Portfolio (Class R6/JESRX) | ||||||||||||||||
| Account Value | $ 2,292,497.547186 | 2,292,497.547186 | $ 2,292,497.547186 | $ 2,292,497.547186 | 2,292,497.547186 | 1,885,156.417237 | 1,701,292.481741 | 2,080,159.198774 | 1,605,756.343189 | 1,364,212.320289 | 1,376,042.626604 | 1,234,433.19114 | 1,062,000 | 1,000,000 | |||
| Average Annual Return, Percent | 21.61% | 10.94% | 10.35% | ||||||||||||||
| C000037362 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class 1/JLEOX) | ||||||||||||||||
| Account Value | $ 18,237.294417 | 18,237.294417 | $ 18,237.294417 | $ 18,237.294417 | $ 18,237.294417 | 15,928.145735 | 15,038.867284 | 17,568.080398 | 14,640.971566 | 12,875.979092 | 12,604.753165 | 11,702.552705 | 10,385.886512 | 9,675.7823 | 10,000 | ||
| Average Annual Return, Percent | 14.50% | 7.21% | 6.19% | ||||||||||||||
| C000037352 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class A/JLEAX) | ||||||||||||||||
| Account Value | $ 16,699.577049 | 16,699.577049 | $ 16,699.577049 | 16,699.577049 | $ 16,699.577049 | 14,629.505015 | 13,875.708931 | 16,272.545728 | 13,602.822009 | 12,012.775594 | 11,800.599169 | 10,987.514729 | 9,791.206252 | 9,158.77121 | 9,500 | ||
| Average Annual Return, Percent | 8.44% | 5.72% | 5.26% | ||||||||||||||
| C000037352 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class A/JLEAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 14.15% | 6.81% | 5.80% | ||||||||||||||
| C000153959 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class I/JHRNX) | ||||||||||||||||
| Account Value | $ 451,848.886777 | 451,848.886777 | $ 451,848.886777 | 451,848.886777 | $ 451,848.886777 | 394,489.536203 | 373,205.778592 | 436,153.563075 | 363,754.576659 | 320,178.339828 | 313,372.533938 | 290,876.376078 | 258,303.680162 | 240,812.48 | 250,000 | ||
| Average Annual Return, Percent | 14.54% | 7.13% | 6.10% | ||||||||||||||
| C000113506 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class R2/JLEEX) | ||||||||||||||||
| Account Value | $ 17,430.861509 | 17,430.861509 | $ 17,430.861509 | 17,430.861509 | $ 17,430.861509 | 15,297.408575 | 14,517.817181 | 17,033.902199 | 14,253.652933 | 12,595.929706 | 12,384.501862 | 11,546.19833 | 10,290.300312 | 9,630.4509 | 10,000 | ||
| Average Annual Return, Percent | 13.95% | 6.71% | 5.71% | ||||||||||||||
| C000037360 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class R4/JLEGX) | ||||||||||||||||
| Account Value | $ 17,863.026376 | 17,863.026376 | $ 17,863.026376 | 17,863.026376 | $ 17,863.026376 | 15,634.632795 | 14,798.32051 | 17,320.634435 | 14,463.183844 | 12,748.132569 | 12,509.778996 | 11,630.764218 | 10,343.006075 | 9,656.5247 | 10,000 | ||
| Average Annual Return, Percent | 14.25% | 6.98% | 5.97% | ||||||||||||||
| C000037361 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class R5/JLEHX) | ||||||||||||||||
| Account Value | $ 18,209.864266 | 18,209.864266 | $ 18,209.864266 | 18,209.864266 | $ 18,209.864266 | 15,903.238653 | 15,034.601189 | 17,564.775275 | 14,639.449357 | 12,874.674469 | 12,604.829152 | 11,702.594352 | 10,385.886512 | 9,675.7823 | 10,000 | ||
| Average Annual Return, Percent | 14.50% | 7.18% | 6.18% | ||||||||||||||
| C000106462 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2025 Lifetime Portfolio (Class R6/JLEIX) | ||||||||||||||||
| Account Value | $ 1,833,734.5995 | 1,833,734.5995 | $ 1,833,734.5995 | 1,833,734.5995 | $ 1,833,734.5995 | 1,598,764.20788 | 1,510,530.639034 | 1,763,843.177909 | 1,469,110.470396 | 1,292,380.011096 | 1,263,216.103029 | 1,172,176.440954 | 1,039,657.302619 | 968,019.99 | 1,000,000 | ||
| Average Annual Return, Percent | 14.70% | 7.25% | 6.25% | ||||||||||||||
| C000037395 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class 1/JLIOX) | ||||||||||||||||
| Account Value | $ 21,477.598257 | 21,477.598257 | $ 21,477.598257 | 21,477.598257 | $ 21,477.598257 | 17,945.807225 | 16,422.095418 | 19,963.605979 | 15,604.55585 | 13,269.992706 | 13,372.62385 | 12,022.16136 | 10,340.343388 | 9,610.8532 | 10,000 | ||
| Average Annual Return, Percent | 19.68% | 10.11% | 7.94% | ||||||||||||||
| C000037385 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class A/JLIAX) | ||||||||||||||||
| Account Value | $ 19,673.982498 | 19,673.982498 | $ 19,673.982498 | 19,673.982498 | $ 19,673.982498 | 16,481.118625 | 15,137.993214 | 18,488.5569959999 | 14,503.300948 | 12,376.991065 | 12,513.58928 | 11,291.281521 | 9,749.603358 | 9,094.822435 | 9,500 | ||
| Average Annual Return, Percent | 13.37% | 8.60% | 7% | ||||||||||||||
| C000037385 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class A/JLIAX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 19.37% | 9.71% | 7.55% | ||||||||||||||
| C000153962 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class I/JHRDX) | ||||||||||||||||
| Account Value | $ 531,635.905785 | 531,635.905785 | $ 531,635.905785 | 531,635.905785 | $ 531,635.905785 | 444,099.850548 | 406,743.219181 | 495,174.725428 | 386,990.014443 | 329,333.345681 | 332,145.57912 | 298,788.182231 | 257,172.619524 | 239,212.375 | 250,000 | ||
| Average Annual Return, Percent | 19.71% | 10.05% | 7.84% | ||||||||||||||
| C000113509 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class R2/JLIEX) | ||||||||||||||||
| Account Value | $ 20,536.501697 | 20,536.501697 | $ 20,536.501697 | 20,536.501697 | $ 20,536.501697 | 17,230.538569 | 15,831.072838 | 19,356.727511 | 15,191.271697 | 12,979.009075 | 13,133.726341 | 11,863.356166 | 10,254.399108 | 9,574.2183 | 10,000 | ||
| Average Annual Return, Percent | 19.19% | 9.61% | 7.46% | ||||||||||||||
| C000037393 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class R4/JLIGX) | ||||||||||||||||
| Account Value | $ 21,048.938591 | 21,048.938591 | $ 21,048.938591 | 21,048.938591 | $ 21,048.938591 | 17,612.886675 | 16,147.550556 | 19,681.964049 | 15,411.081845 | 13,133.123122 | 13,257.980819 | 11,947.124085 | 10,298.898645 | 9,589.743 | 10,000 | ||
| Average Annual Return, Percent | 19.51% | 9.89% | 7.73% | ||||||||||||||
| C000037394 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class R5/JLIHX) | ||||||||||||||||
| Account Value | $ 21,477.351831 | 21,477.351831 | $ 21,477.351831 | 21,477.351831 | $ 21,477.351831 | 17,937.148642 | 16,419.334071 | 19,969.635523 | 15,605.418065 | 13,263.627534 | 13,367.831114 | 12,019.58101 | 10,339.442224 | 9,611.1821 | 10,000 | ||
| Average Annual Return, Percent | 19.74% | 10.12% | 7.94% | ||||||||||||||
| C000106465 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2040 Lifetime Portfolio (Class R6/JLIIX) | ||||||||||||||||
| Account Value | $ 2,159,217.052029 | 2,159,217.052029 | $ 2,159,217.052029 | 2,159,217.052029 | $ 2,159,217.052029 | 1,801,188.192581 | 1,649,145.865647 | 2,004,235.265625 | 1,565,616.56068 | 1,330,595.115527 | 1,340,124.999019 | 1,204,136.245424 | 1,035,937.61273 | 961,516.21 | 1,000,000 | ||
| Average Annual Return, Percent | 19.88% | 10.17% | 8% | ||||||||||||||
| C000138478 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class 1/JLKUX) | ||||||||||||||||
| Account Value | $ 22,232.616387 | 22,232.616387 | $ 22,232.616387 | 22,232.616387 | $ 22,232.616387 | 18,312.2607629999 | 16,539.275264 | 20,224.041656 | 15,623.85249 | 13,281.8997369999 | 13,408.382213 | 12,033.59263 | 10,354.003017 | 9,619.7728 | 10,000 | ||
| Average Annual Return, Percent | 21.41% | 10.85% | 8.32% | ||||||||||||||
| C000138479 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class A/JLKLX) | ||||||||||||||||
| Account Value | $ 20,350.176655 | 20,350.176655 | $ 20,350.176655 | 20,350.176655 | $ 20,350.176655 | 16,804.995897 | 15,238.700124 | 18,706.338868 | 14,515.6159489999 | 12,378.978404 | 12,542.350928 | 11,290.668949 | 9,755.759924 | 9,097.76829 | 9,500 | ||
| Average Annual Return, Percent | 15% | 9.33% | 7.36% | ||||||||||||||
| C000138479 [Member] | Without Sales Load [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class A/JLKLX)—excluding sales charge | ||||||||||||||||
| Average Annual Return, Percent | 21.10% | 10.45% | 7.92% | ||||||||||||||
| C000153974 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class I/JHRTX) | ||||||||||||||||
| Account Value | $ 550,837.649808 | 550,837.649808 | $ 550,837.649808 | 550,837.649808 | $ 550,837.649808 | 453,558.298195 | 409,965.572466 | 501,706.001741 | 388,096.265118 | 330,101.71485 | 333,468.89703 | 299,159.180258 | 257,789.475779 | 239,678.7725 | 250,000 | ||
| Average Annual Return, Percent | 21.45% | 10.78% | 8.22% | ||||||||||||||
| C000138473 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class R2/JLKNX) | ||||||||||||||||
| Account Value | $ 21,370.983525 | 21,370.983525 | $ 21,370.983525 | 21,370.983525 | $ 21,370.983525 | 17,673.895645 | 16,040.444854 | 19,708.991121 | 15,302.675767 | 13,070.86057 | 13,249.535055 | 11,938.30322 | 10,297.399172 | 9,595.7514 | 10,000 | ||
| Average Annual Return, Percent | 20.92% | 10.33% | 7.89% | ||||||||||||||
| C000138475 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class R4/JLKQX) | ||||||||||||||||
| Account Value | $ 21,989.669703 | 21,989.669703 | $ 21,989.669703 | 21,989.669703 | $ 21,989.669703 | 18,124.297062 | 16,392.810398 | 20,056.880809 | 15,524.660004 | 13,208.878501 | 13,347.862451 | 11,990.426183 | 10,327.751725 | 9,614.3665 | 10,000 | ||
| Average Annual Return, Percent | 21.33% | 10.73% | 8.20% | ||||||||||||||
| C000138476 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class R5/JLKSX) | ||||||||||||||||
| Account Value | $ 22,239.737279 | 22,239.737279 | $ 22,239.737279 | 22,239.737279 | $ 22,239.737279 | 18,305.387447 | 16,552.442564 | 20,238.649708 | 15,639.460866 | 13,285.061649 | 13,414.577517 | 12,047.0697 | 10,363.580642 | 9,629.3638 | 10,000 | ||
| Average Annual Return, Percent | 21.49% | 10.85% | 8.32% | ||||||||||||||
| C000138477 [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Multimanager 2055 Lifetime Portfolio (Class R6/JLKTX) | ||||||||||||||||
| Account Value | $ 2,232,586.352509 | 2,232,586.352509 | $ 2,232,586.352509 | 2,232,586.352509 | $ 2,232,586.352509 | 1,836,743.165528 | 1,659,732.840644 | 2,028,390.278917 | 1,566,708.050478 | 1,331,353.688591 | 1,342,046.389518 | 1,203,888.538162 | 1,035,343.054467 | 962,395.47 | 1,000,000 | ||
| Average Annual Return, Percent | 21.55% | 10.89% | 8.36% | ||||||||||||||
| 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 | $ 11,765.406371 | 11,765.406371 | $ 11,765.406371 | 11,765.406371 | $ 11,765.406371 | 10,965.301134 | 11,097.722488 | 12,542.057701 | 12,552.641963 | 11,789.468742 | 10,700.908741 | 10,814.374128 | 10,761.416551 | 10,155.4935 | 10,000 | ||
| Average Annual Return, Percent | 7.30% | (0.04%) | 1.64% | ||||||||||||||
| Standard & Poor's 500 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||||||||
| Account Value | $ 18,102.778593 | $ 18,102.778593 | $ 18,102.778593 | $ 18,102.778593 | $ 18,102.778593 | 14,238.979302 | 12,280.856323 | 13,834.0945 | 10,000 | 18,614.067583 | 15,265.349906 | 14,832.022577 | 12,394.976573 | 10,663.807 | 10,000 | 10,047.7913 | 10,000 |
| Average Annual Return, Percent | 27.14% | 16.26% | 15.92% | 14.79% | 12.98% | ||||||||||||
| S And P Target Date 2015 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2015 Index | ||||||||||||||||
| Account Value | $ 16,531.875992 | $ 16,531.875992 | $ 16,531.875992 | $ 16,531.875992 | $ 16,531.875992 | 14,659.037897 | 13,893.3809 | 15,530.438697 | 13,780.501828 | 12,599.303055 | 12,127.524874 | 11,406.575358 | 10,595.973627 | 9,900.8611 | 10,000 | ||
| Average Annual Return, Percent | 12.78% | 5.58% | 5.16% | ||||||||||||||
| John Hancock 2015 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2015 Lifetime Index | ||||||||||||||||
| Account Value | $ 16,941.832458 | 16,941.832458 | $ 16,941.832458 | 16,941.832458 | $ 16,941.832458 | 14,996.859726 | 14,302.169596 | 16,025.678965 | 14,084.845806 | 12,919.141702 | 12,170.589704 | 11,492.909166 | 10,678.162783 | 9,720.6199 | 10,000 | ||
| Average Annual Return, Percent | 12.97% | 5.57% | 5.41% | ||||||||||||||
| S And P Target Date 2030 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2030 Index | ||||||||||||||||
| Account Value | $ 19,366.123124 | 19,366.123124 | $ 19,366.123124 | 19,366.123124 | $ 19,366.123124 | 16,686.964551 | 15,364.17344 | 17,523.135536 | 14,605.624748 | 13,160.994025 | 12,943.267301 | 11,778.484275 | 10,586.506905 | 9,801.2624 | 10,000 | ||
| Average Annual Return, Percent | 16.06% | 8.03% | 6.83% | ||||||||||||||
| John Hancock 2030 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2030 Lifetime Index | ||||||||||||||||
| Account Value | $ 20,825.759206 | 20,825.759206 | $ 20,825.759206 | 20,825.759206 | $ 20,825.759206 | 17,846.439447 | 16,665.427122 | 19,350.187008 | 15,865.987057 | 13,954.410831 | 13,423.110687 | 12,084.90885 | 10,705.510369 | 9,645.0092 | 10,000 | ||
| Average Annual Return, Percent | 16.69% | 8.33% | 7.61% | ||||||||||||||
| John Hancock 2045 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2045 Lifetime Index | ||||||||||||||||
| Account Value | $ 24,174.67952 | 24,174.67952 | $ 24,174.67952 | 24,174.67952 | $ 24,174.67952 | 19,970.541281 | 18,025.167507 | 21,222.27851 | 16,383.628955 | 14,133.960156 | 14,017.923152 | 12,294.772004 | 10,619.050569 | 9,603.0176 | 10,000 | ||
| Average Annual Return, Percent | 21.05% | 11.32% | 9.22% | ||||||||||||||
| S And P Target Date 2010 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2010 Index | ||||||||||||||||
| Account Value | $ 15,868.958858 | 15,868.958858 | $ 15,868.958858 | 15,868.958858 | $ 15,868.958858 | 14,138.843948 | 13,429.880809 | 14,966.85632 | 13,499.603942 | 12,367.327722 | 11,843.566484 | 11,239.320176 | 10,567.919137 | 9,927.3656 | 10,000 | ||
| Average Annual Return, Percent | 12.24% | 5.11% | 4.73% | ||||||||||||||
| John Hancock 2010 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2010 Lifetime Index | ||||||||||||||||
| Account Value | $ 16,203.630427 | 16,203.630427 | $ 16,203.630427 | 16,203.630427 | $ 16,203.630427 | 14,449.914656 | 13,826.555332 | 15,341.357607 | 13,684.455259 | 12,656.152605 | 11,911.464183 | 11,347.317432 | 10,618.217029 | 9,735.1487 | 10,000 | ||
| Average Annual Return, Percent | 12.14% | 5.06% | 4.94% | ||||||||||||||
| S And P Target Date 2025 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2025 Index | ||||||||||||||||
| Account Value | $ 18,138.828096 | 18,138.828096 | $ 18,138.828096 | 18,138.828096 | $ 18,138.828096 | 15,869.10493 | 14,809.212688 | 16,752.593815 | 14,323.608711 | 12,988.431584 | 12,654.267803 | 11,661.215914 | 10,587.436515 | 9,827.4555 | 10,000 | ||
| Average Annual Return, Percent | 14.30% | 6.91% | 6.14% | ||||||||||||||
| John Hancock 2025 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2025 Lifetime Index | ||||||||||||||||
| Account Value | $ 19,422.919578 | 19,422.919578 | $ 19,422.919578 | 19,422.919578 | $ 19,422.919578 | 16,908.465849 | 15,966.699912 | 18,301.587743 | 15,394.501994 | 13,721.805407 | 13,070.434799 | 11,943.006505 | 10,757.322674 | 9,678.1009 | 10,000 | ||
| Average Annual Return, Percent | 14.87% | 7.19% | 6.86% | ||||||||||||||
| S And P Target Date 2060 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2060+ Index | ||||||||||||||||
| Account Value | $ 15,640.196519 | $ 15,640.196519 | $ 15,640.196519 | $ 15,640.196519 | $ 15,640.196519 | 12,916.48718 | 11,435.406291 | 13,322.5848 | 10,000 | 15,478.797137 | 13,731.595637 | 13,801.097412 | 12,202.622881 | 10,607.1808 | 10,000 | ||
| Average Annual Return, Percent | 21.09% | 12.02% | 11.18% | 10.58% | |||||||||||||
| John Hancock 2065 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2065 Lifetime Index | ||||||||||||||||
| Account Value | $ 15,473.336097 | $ 15,473.336097 | $ 15,473.336097 | $ 15,473.336097 | 15,473.336097 | 12,715.392302 | 11,435.081575 | 13,474.154 | $ 10,000 | ||||||||
| Average Annual Return, Percent | 21.69% | 11.72% | |||||||||||||||
| S And P Target Date 2045 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2045 Index | ||||||||||||||||
| Account Value | $ 22,481.890242 | $ 22,481.890242 | $ 22,481.890242 | 22,481.890242 | $ 22,481.890242 | 18,674.086103 | 16,619.287235 | 19,311.117603 | 15,165.243728 | 13,493.888055 | 13,517.346193 | 12,029.50844 | 10,570.971371 | 9,738.3809 | 10,000 | ||
| Average Annual Return, Percent | 20.39% | 10.75% | 8.44% | ||||||||||||||
| John Hancock 2060 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2060 Lifetime Index | ||||||||||||||||
| Account Value | $ 24,788.605603 | 24,788.605603 | $ 24,788.605603 | $ 24,788.605603 | $ 24,788.605603 | 20,370.322397 | 18,319.238038 | 21,585.874387 | 16,664.150139 | 14,375.962416 | 14,257.938622 | 12,505.283608 | 10,800.8704 | $ 10,000 | |||
| Average Annual Return, Percent | 21.69% | 11.51% | 11.38% | ||||||||||||||
| S And P Target Date 2050 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2050 Index | ||||||||||||||||
| Account Value | $ 22,909.976779 | 22,909.976779 | $ 22,909.976779 | $ 22,909.976779 | $ 22,909.976779 | 18,939.234145 | 16,794.66553 | 19,547.387244 | 15,256.225875 | 13,558.871315 | 13,620.74149 | 12,083.346824 | 10,564.485928 | 9,723.0055 | 10,000 | ||
| Average Annual Return, Percent | 20.97% | 11.06% | 8.64% | ||||||||||||||
| John Hancock 2050 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2050 Lifetime Index | ||||||||||||||||
| Account Value | $ 24,371.318858 | 24,371.318858 | $ 24,371.318858 | 24,371.318858 | $ 24,371.318858 | 20,027.412204 | 18,010.855415 | 21,222.501819 | 16,383.628955 | 14,133.960156 | 14,017.923152 | 12,294.772004 | 10,619.050569 | 9,603.0176 | 10,000 | ||
| Average Annual Return, Percent | 21.69% | 11.51% | 9.32% | ||||||||||||||
| S And P Target Date 2020 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2020 Index | ||||||||||||||||
| Account Value | $ 17,142.948178 | 17,142.948178 | $ 17,142.948178 | 17,142.948178 | $ 17,142.948178 | 15,072.042725 | 14,177.613524 | 15,956.327411 | 14,022.439372 | 12,805.627633 | 12,376.210983 | 11,547.612617 | 10,604.654579 | 9,873.6684 | 10,000 | ||
| Average Annual Return, Percent | 13.74% | 6.01% | 5.54% | ||||||||||||||
| John Hancock 2020 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2020 Lifetime Index | ||||||||||||||||
| Account Value | $ 17,998.423825 | 17,998.423825 | $ 17,998.423825 | 17,998.423825 | $ 17,998.423825 | 15,816.563664 | 15,034.051506 | 17,014.693526 | 14,725.868435 | 13,353.351904 | 12,629.60315 | 11,736.013789 | 10,737.498381 | 9,703.4054 | 10,000 | ||
| Average Annual Return, Percent | 13.79% | 6.15% | 6.05% | ||||||||||||||
| S And P Target Date 2035 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2035 Index | ||||||||||||||||
| Account Value | $ 20,700.978636 | 20,700.978636 | $ 20,700.978636 | 20,700.978636 | $ 20,700.978636 | 17,565.182827 | 15,955.063114 | 18,367.196124 | 14,877.716411 | 13,320.097509 | 13,220.391432 | 11,896.978128 | 10,585.587962 | 9,777.8793 | 10,000 | ||
| Average Annual Return, Percent | 17.85% | 9.22% | 7.55% | ||||||||||||||
| John Hancock 2035 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2035 Lifetime Index | ||||||||||||||||
| Account Value | $ 22,120.208249 | 22,120.208249 | $ 22,120.208249 | 22,120.208249 | $ 22,120.208249 | 18,696.084184 | 17,262.006406 | 20,198.543117 | 16,152.862716 | 14,082.617653 | 13,732.001748 | 12,198.261618 | 10,654.367112 | 9,614.8317 | 10,000 | ||
| Average Annual Return, Percent | 18.31% | 9.44% | 8.26% | ||||||||||||||
| S And P Target Date 2040 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2040 Index | ||||||||||||||||
| Account Value | $ 21,793.236848 | 21,793.236848 | $ 21,793.236848 | 21,793.236848 | $ 21,793.236848 | 18,246.676959 | 16,375.070582 | 18,961.17083 | 15,059.555618 | 13,429.82009 | 13,405.858726 | 11,971.422527 | 10,579.07708 | 9,756.891 | 10,000 | ||
| Average Annual Return, Percent | 19.44% | 10.17% | 8.10% | ||||||||||||||
| John Hancock 2040 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2040 Lifetime Index | ||||||||||||||||
| Account Value | $ 23,419.741388 | 23,419.741388 | $ 23,419.741388 | 23,419.741388 | $ 23,419.741388 | 19,552.957343 | 17,834.417207 | 20,933.531263 | 16,383.156038 | 14,177.430298 | 14,003.678675 | 12,294.772004 | 10,619.050569 | 9,603.0176 | 10,000 | ||
| Average Annual Return, Percent | 19.78% | 10.55% | 8.88% | ||||||||||||||
| S And P Target Date 2055 Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P Target Date 2055 Index | ||||||||||||||||
| Account Value | $ 23,051.132044 | 23,051.132044 | $ 23,051.132044 | 23,051.132044 | $ 23,051.132044 | 19,042.63917 | 16,873.575765 | 19,647.639321 | 15,295.633338 | 13,593.370608 | 13,662.497654 | 12,110.036937 | 10,552.350826 | 9,708.5924 | 10,000 | ||
| Average Annual Return, Percent | 21.05% | 11.14% | 8.71% | ||||||||||||||
| John Hancock 2055 Lifetime Index [Member] | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | John Hancock 2055 Lifetime Index | ||||||||||||||||
| Account Value | $ 24,371.318858 | $ 24,371.318858 | $ 24,371.318858 | $ 24,371.318858 | $ 24,371.318858 | $ 20,027.412204 | $ 18,010.855415 | $ 21,222.501819 | $ 16,383.628955 | $ 14,133.960156 | $ 14,017.923152 | $ 12,294.772004 | $ 10,619.050569 | $ 9,603.0176 | $ 10,000 | ||
| Average Annual Return, Percent | 21.69% | 11.51% | 9.32% |
| Shareholder Report, Holdings (Details) | Aug. 31, 2024 |
| C000037340 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000037340 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037340 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000037340 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000037340 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000037340 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000037340 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000037340 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000037340 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037340 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000037340 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000037340 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037340 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037340 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037340 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037340 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037340 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037340 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037340 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037340 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000037340 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037330 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000037330 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037330 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000037330 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000037330 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000037330 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000037330 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000037330 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000037330 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037330 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000037330 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000037330 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037330 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037330 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037330 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037330 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037330 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037330 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037330 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037330 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000037330 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000153957 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000153957 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000153957 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000153957 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000153957 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000153957 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000153957 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000153957 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000153957 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000153957 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000153957 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000153957 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000153957 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000153957 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000153957 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000153957 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153957 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000153957 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000153957 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000153957 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000153957 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000113504 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000113504 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000113504 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000113504 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000113504 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000113504 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000113504 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000113504 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000113504 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000113504 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000113504 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000113504 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000113504 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000113504 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000113504 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000113504 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113504 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000113504 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000113504 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000113504 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000113504 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037338 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000037338 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037338 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000037338 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000037338 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000037338 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000037338 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000037338 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000037338 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037338 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000037338 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000037338 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037338 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037338 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037338 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037338 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037338 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037338 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037338 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037338 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000037338 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037339 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000037339 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037339 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000037339 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000037339 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000037339 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000037339 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000037339 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000037339 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037339 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000037339 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000037339 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037339 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037339 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037339 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037339 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037339 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037339 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037339 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000037339 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000037339 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000106460 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000106460 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000106460 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30% |
| C000106460 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 52.40% |
| C000106460 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000106460 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.80% |
| C000106460 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| C000106460 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000106460 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000106460 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.30% |
| C000106460 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000106460 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000106460 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000106460 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000106460 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000106460 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106460 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000106460 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000106460 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000106460 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000106460 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037373 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037373 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037373 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000037373 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000037373 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037373 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037373 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000037373 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000037373 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037373 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000037373 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037373 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037373 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037373 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037373 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037373 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037373 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037373 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037373 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037373 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037373 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037373 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037373 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037363 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037363 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037363 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000037363 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000037363 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037363 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037363 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000037363 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000037363 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037363 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000037363 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037363 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037363 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037363 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037363 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037363 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037363 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037363 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037363 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037363 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037363 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037363 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037363 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000153960 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000153960 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000153960 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000153960 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000153960 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000153960 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000153960 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000153960 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000153960 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000153960 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000153960 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000153960 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000153960 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000153960 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000153960 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000153960 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153960 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000153960 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153960 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000153960 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153960 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000153960 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000153960 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000113507 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000113507 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000113507 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000113507 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000113507 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000113507 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000113507 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000113507 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000113507 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000113507 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000113507 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000113507 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000113507 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000113507 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000113507 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000113507 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113507 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000113507 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113507 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000113507 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113507 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000113507 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000113507 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037371 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037371 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037371 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000037371 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000037371 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037371 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037371 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000037371 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000037371 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037371 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000037371 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037371 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037371 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037371 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037371 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037371 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037371 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037371 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037371 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037371 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037371 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037371 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037371 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037372 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037372 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037372 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000037372 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000037372 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000037372 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037372 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000037372 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000037372 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037372 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000037372 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037372 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037372 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037372 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000037372 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037372 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037372 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037372 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037372 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037372 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037372 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037372 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037372 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000106463 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000106463 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000106463 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.60% |
| C000106463 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.50% |
| C000106463 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000106463 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000106463 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.70% |
| C000106463 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000106463 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000106463 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| C000106463 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000106463 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000106463 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000106463 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000106463 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000106463 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106463 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000106463 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106463 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000106463 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106463 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000106463 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000106463 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037309 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000037309 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000037309 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037309 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.10% |
| C000037309 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| C000037309 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.30% |
| C000037309 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000037309 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000037309 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000037309 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000037309 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037309 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037309 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037309 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000037309 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037309 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037309 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000037309 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037309 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037309 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037307 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000037307 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000037307 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037307 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.10% |
| C000037307 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| C000037307 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.30% |
| C000037307 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000037307 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000037307 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000037307 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000037307 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037307 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037307 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037307 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000037307 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037307 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037307 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000037307 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037307 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037307 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000153956 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000153956 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000153956 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000153956 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.10% |
| C000153956 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| C000153956 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.30% |
| C000153956 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000153956 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000153956 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000153956 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000153956 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000153956 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000153956 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000153956 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000153956 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153956 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000153956 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000153956 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000153956 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000153956 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000113503 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000113503 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000113503 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000113503 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.10% |
| C000113503 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| C000113503 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.30% |
| C000113503 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000113503 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000113503 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000113503 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000113503 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000113503 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000113503 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000113503 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000113503 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113503 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000113503 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000113503 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000113503 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000113503 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037308 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000037308 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000037308 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037308 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.10% |
| C000037308 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| C000037308 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.30% |
| C000037308 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000037308 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000037308 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000037308 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000037308 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037308 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037308 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037308 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000037308 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037308 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037308 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000037308 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037308 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037308 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000106459 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000106459 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000106459 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000106459 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.10% |
| C000106459 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| C000106459 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 89.30% |
| C000106459 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000106459 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000106459 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| C000106459 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000106459 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000106459 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000106459 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000106459 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000106459 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106459 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000106459 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000106459 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000106459 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000106459 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037417 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000037417 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000037417 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000037417 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037417 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037417 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000037417 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000037417 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000037417 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037417 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037417 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037417 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037417 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037417 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037417 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037417 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037417 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037417 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037417 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000037417 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037407 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000037407 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000037407 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000037407 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037407 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037407 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000037407 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000037407 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000037407 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037407 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037407 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037407 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037407 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037407 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037407 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037407 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037407 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037407 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037407 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000037407 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000153964 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000153964 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000153964 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000153964 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000153964 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000153964 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000153964 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000153964 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000153964 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000153964 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000153964 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000153964 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000153964 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000153964 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153964 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000153964 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153964 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000153964 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000153964 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000153964 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000113511 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000113511 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000113511 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000113511 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000113511 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000113511 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000113511 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000113511 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000113511 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000113511 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000113511 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000113511 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000113511 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000113511 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113511 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000113511 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113511 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000113511 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000113511 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000113511 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037415 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000037415 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000037415 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000037415 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037415 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037415 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000037415 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000037415 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000037415 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037415 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037415 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037415 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037415 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037415 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037415 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037415 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037415 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037415 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037415 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000037415 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037416 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000037416 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000037416 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000037416 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037416 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037416 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000037416 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000037416 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000037416 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000037416 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037416 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037416 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000037416 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037416 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037416 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037416 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037416 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000037416 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037416 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000037416 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000106467 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000106467 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000106467 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000106467 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000106467 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000106467 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000106467 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000106467 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000106467 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000106467 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000106467 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000106467 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000106467 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000106467 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106467 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000106467 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106467 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000106467 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000106467 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000106467 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221540 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221540 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221540 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221540 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221540 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221540 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221540 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221540 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221540 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221540 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221540 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221540 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221540 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221540 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221540 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221540 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221540 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221540 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221540 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221540 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221534 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221534 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221534 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221534 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221534 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221534 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221534 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221534 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221534 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221534 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221534 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221534 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221534 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221534 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221534 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221534 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221534 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221534 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221534 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221534 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221535 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221535 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221535 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221535 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221535 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221535 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221535 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221535 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221535 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221535 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221535 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221535 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221535 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221535 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221535 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221535 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221535 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221535 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221535 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221535 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221536 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221536 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221536 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221536 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221536 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221536 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221536 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221536 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221536 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221536 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221536 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221536 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221536 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221536 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221536 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221536 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221536 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221536 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221536 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221536 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221537 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221537 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221537 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221537 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221537 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221537 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221537 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221537 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221537 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221537 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221537 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221537 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221537 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221537 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221537 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221537 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221537 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221537 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221537 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221537 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221538 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221538 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221538 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221538 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221538 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221538 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221538 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221538 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221538 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221538 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221538 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221538 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221538 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221538 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221538 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221538 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221538 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221538 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221538 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221538 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000221539 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000221539 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000221539 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000221539 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000221539 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000221539 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000221539 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.70% |
| C000221539 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000221539 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000221539 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221539 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000221539 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000221539 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000221539 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000221539 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221539 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000221539 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000221539 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000221539 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000221539 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037351 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000037351 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037351 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000037351 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000037351 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000037351 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000037351 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000037351 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037351 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037351 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037351 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000037351 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037351 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037351 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037351 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000037351 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037351 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037351 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037351 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037351 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037351 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037351 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000037351 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037341 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000037341 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037341 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000037341 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000037341 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000037341 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000037341 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000037341 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037341 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037341 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037341 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000037341 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037341 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037341 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037341 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000037341 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037341 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037341 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037341 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037341 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037341 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037341 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000037341 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000153958 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000153958 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000153958 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000153958 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000153958 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000153958 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000153958 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000153958 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000153958 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153958 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000153958 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000153958 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000153958 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000153958 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000153958 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000153958 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153958 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000153958 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153958 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000153958 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000153958 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000153958 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000153958 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000113505 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000113505 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000113505 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000113505 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000113505 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000113505 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000113505 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000113505 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000113505 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113505 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000113505 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000113505 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000113505 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000113505 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000113505 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000113505 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113505 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000113505 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113505 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000113505 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000113505 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000113505 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000113505 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037349 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000037349 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037349 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000037349 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000037349 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000037349 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000037349 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000037349 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037349 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037349 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037349 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000037349 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037349 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037349 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037349 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000037349 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037349 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037349 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037349 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037349 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037349 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037349 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000037349 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037350 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000037350 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037350 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000037350 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000037350 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000037350 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000037350 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000037350 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037350 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037350 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000037350 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000037350 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037350 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000037350 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000037350 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000037350 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037350 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037350 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037350 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037350 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000037350 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037350 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000037350 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000106461 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000106461 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000106461 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.30% |
| C000106461 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 46.60% |
| C000106461 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000106461 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.40% |
| C000106461 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000106461 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000106461 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106461 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.90% |
| C000106461 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000106461 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000106461 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000106461 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| C000106461 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.50% |
| C000106461 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106461 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000106461 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106461 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000106461 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000106461 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000106461 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000106461 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037384 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037384 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000037384 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000037384 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037384 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000037384 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000037384 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000037384 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000037384 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037384 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000037384 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037384 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037384 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037384 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037384 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000037384 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037384 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037384 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037384 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037384 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037384 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037384 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000037374 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037374 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000037374 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000037374 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037374 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000037374 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000037374 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000037374 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000037374 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037374 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000037374 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037374 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037374 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037374 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037374 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000037374 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037374 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037374 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037374 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037374 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037374 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037374 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000153961 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000153961 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000153961 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000153961 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000153961 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000153961 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000153961 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000153961 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000153961 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000153961 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000153961 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153961 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000153961 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000153961 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000153961 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000153961 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153961 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000153961 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000153961 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000153961 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000153961 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000153961 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000113508 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000113508 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000113508 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000113508 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000113508 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000113508 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000113508 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000113508 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000113508 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000113508 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000113508 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113508 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000113508 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000113508 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000113508 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000113508 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113508 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000113508 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000113508 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000113508 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000113508 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000113508 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000037382 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037382 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000037382 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000037382 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037382 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000037382 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000037382 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000037382 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000037382 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037382 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000037382 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037382 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037382 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037382 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037382 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000037382 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037382 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037382 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037382 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037382 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037382 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037382 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000037383 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037383 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000037383 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000037383 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000037383 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000037383 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000037383 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000037383 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000037383 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037383 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000037383 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037383 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037383 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000037383 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037383 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000037383 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037383 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037383 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000037383 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037383 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000037383 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037383 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000106464 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000106464 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000106464 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000106464 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000106464 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000106464 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.70% |
| C000106464 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000106464 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000106464 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000106464 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| C000106464 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106464 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000106464 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000106464 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000106464 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000106464 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106464 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000106464 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000106464 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000106464 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000106464 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000106464 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000037406 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000037406 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000037406 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000037406 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000037406 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037406 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000037406 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000037406 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000037406 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000037406 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000037406 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037406 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037406 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037406 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037406 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037406 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037406 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037406 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037406 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037406 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000037406 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037396 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000037396 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000037396 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000037396 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000037396 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037396 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000037396 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000037396 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000037396 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000037396 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000037396 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037396 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037396 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037396 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037396 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037396 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037396 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037396 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037396 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037396 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000037396 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000153963 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000153963 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000153963 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000153963 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000153963 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000153963 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000153963 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000153963 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000153963 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000153963 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000153963 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000153963 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153963 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000153963 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000153963 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153963 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000153963 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153963 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000153963 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000153963 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000153963 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000113510 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000113510 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000113510 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000113510 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000113510 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000113510 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000113510 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000113510 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000113510 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000113510 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000113510 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000113510 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113510 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000113510 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000113510 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113510 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000113510 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113510 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000113510 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000113510 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000113510 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037404 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000037404 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000037404 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000037404 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000037404 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037404 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000037404 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000037404 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000037404 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000037404 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000037404 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037404 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037404 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037404 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037404 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037404 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037404 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037404 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037404 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037404 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000037404 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000037405 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000037405 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000037405 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000037405 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000037405 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000037405 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000037405 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000037405 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000037405 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000037405 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000037405 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037405 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037405 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037405 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000037405 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037405 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037405 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037405 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000037405 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037405 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000037405 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000106466 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.90% |
| C000106466 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| C000106466 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83.20% |
| C000106466 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000106466 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000106466 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.60% |
| C000106466 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.40% |
| C000106466 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.20% |
| C000106466 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000106466 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000106466 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000106466 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106466 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000106466 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000106466 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106466 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000106466 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106466 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000106466 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000106466 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000106466 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000167626 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167626 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167626 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167626 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167626 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167626 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167626 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167626 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167626 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167626 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167626 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167626 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167626 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167626 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167626 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167626 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167626 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167626 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167626 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167626 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000167627 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167627 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167627 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167627 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167627 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167627 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167627 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167627 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167627 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167627 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167627 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167627 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167627 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167627 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167627 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167627 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167627 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167627 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167627 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167627 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000167619 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167619 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167619 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167619 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167619 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167619 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167619 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167619 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167619 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167619 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167619 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167619 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167619 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167619 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167619 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167619 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167619 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167619 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167619 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167619 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000167621 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167621 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167621 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167621 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167621 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167621 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167621 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167621 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167621 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167621 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167621 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167621 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167621 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167621 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167621 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167621 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167621 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167621 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167621 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167621 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000167623 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167623 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167623 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167623 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167623 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167623 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167623 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167623 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167623 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167623 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167623 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167623 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167623 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167623 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167623 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167623 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167623 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167623 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167623 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167623 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000167624 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167624 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167624 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167624 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167624 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167624 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167624 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167624 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167624 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167624 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167624 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167624 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167624 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167624 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167624 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167624 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167624 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167624 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167624 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167624 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000167625 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.40% |
| C000167625 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000167625 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000167625 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167625 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000167625 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.40% |
| C000167625 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000167625 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.30% |
| C000167625 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000167625 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167625 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000167625 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000167625 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000167625 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000167625 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167625 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000167625 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000167625 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000167625 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000167625 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000037362 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000037362 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037362 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000037362 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000037362 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037362 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037362 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037362 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037362 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037362 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000037362 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037362 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037362 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037362 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037362 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000037362 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037362 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037362 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037362 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037362 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037362 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037362 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037362 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037352 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000037352 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037352 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000037352 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000037352 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037352 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037352 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037352 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037352 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037352 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000037352 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037352 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037352 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037352 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037352 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000037352 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037352 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037352 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037352 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037352 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037352 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037352 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037352 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000153959 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000153959 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000153959 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000153959 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000153959 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000153959 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000153959 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000153959 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000153959 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000153959 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000153959 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000153959 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000153959 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000153959 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000153959 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000153959 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153959 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000153959 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153959 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000153959 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000153959 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000153959 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000153959 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000113506 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000113506 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000113506 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000113506 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000113506 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000113506 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000113506 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000113506 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000113506 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000113506 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000113506 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000113506 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000113506 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000113506 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000113506 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000113506 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113506 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000113506 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113506 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000113506 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000113506 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000113506 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000113506 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037360 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000037360 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037360 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000037360 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000037360 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037360 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037360 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037360 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037360 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037360 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000037360 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037360 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037360 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037360 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037360 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000037360 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037360 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037360 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037360 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037360 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037360 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037360 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037360 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037361 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000037361 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000037361 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000037361 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000037361 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000037361 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000037361 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000037361 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000037361 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000037361 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000037361 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000037361 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000037361 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000037361 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000037361 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000037361 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037361 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037361 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037361 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037361 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037361 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000037361 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000037361 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000106462 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000106462 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000106462 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 41.90% |
| C000106462 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.20% |
| C000106462 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000106462 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.50% |
| C000106462 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.40% |
| C000106462 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000106462 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000106462 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.10% |
| C000106462 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000106462 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000106462 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000106462 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000106462 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000106462 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106462 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000106462 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106462 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000106462 [Member] | Bank loan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000106462 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000106462 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| C000106462 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037395 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000037395 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000037395 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000037395 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000037395 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037395 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000037395 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000037395 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000037395 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000037395 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000037395 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037395 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037395 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037395 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037395 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037395 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037395 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037395 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037395 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037395 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037395 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037395 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000037385 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000037385 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000037385 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000037385 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000037385 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037385 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000037385 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000037385 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000037385 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000037385 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000037385 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037385 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037385 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037385 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037385 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037385 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037385 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037385 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037385 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037385 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037385 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037385 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000153962 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000153962 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000153962 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000153962 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000153962 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000153962 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000153962 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000153962 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000153962 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000153962 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000153962 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153962 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000153962 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000153962 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000153962 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000153962 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153962 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000153962 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153962 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000153962 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000153962 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000153962 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000113509 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000113509 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000113509 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000113509 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000113509 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000113509 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000113509 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000113509 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000113509 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000113509 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000113509 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113509 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000113509 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000113509 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000113509 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000113509 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000113509 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000113509 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000113509 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000113509 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000113509 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000113509 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000037393 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000037393 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000037393 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000037393 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000037393 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037393 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000037393 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000037393 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000037393 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000037393 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000037393 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037393 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037393 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037393 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037393 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037393 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037393 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037393 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037393 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037393 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037393 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037393 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000037394 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000037394 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000037394 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000037394 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000037394 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000037394 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000037394 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000037394 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000037394 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000037394 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000037394 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037394 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000037394 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000037394 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000037394 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000037394 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000037394 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037394 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000037394 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000037394 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000037394 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000037394 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000106465 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000106465 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000106465 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 74.70% |
| C000106465 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| C000106465 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000106465 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 91.30% |
| C000106465 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000106465 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.20% |
| C000106465 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000106465 [Member] | Intermediate bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| C000106465 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106465 [Member] | Multi sector bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000106465 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000106465 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000106465 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000106465 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000106465 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000106465 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000106465 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000106465 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000106465 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000106465 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000138478 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000138478 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000138478 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000138478 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138478 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138478 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000138478 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000138478 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000138478 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000138478 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138478 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000138478 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138478 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000138478 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000138478 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138478 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000138478 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138478 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000138478 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000138478 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000138479 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000138479 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000138479 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000138479 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138479 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138479 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000138479 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000138479 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000138479 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000138479 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138479 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000138479 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138479 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000138479 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000138479 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138479 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000138479 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138479 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000138479 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000138479 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000153974 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000153974 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000153974 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000153974 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000153974 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000153974 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000153974 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000153974 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000153974 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000153974 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000153974 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000153974 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000153974 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000153974 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000153974 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000153974 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000153974 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000153974 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000153974 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000153974 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000138473 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000138473 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000138473 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000138473 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138473 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138473 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000138473 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000138473 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000138473 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000138473 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138473 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000138473 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138473 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000138473 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000138473 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138473 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000138473 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138473 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000138473 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000138473 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000138475 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000138475 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000138475 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000138475 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138475 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138475 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000138475 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000138475 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000138475 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000138475 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138475 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000138475 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138475 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000138475 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000138475 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138475 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000138475 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138475 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000138475 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000138475 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000138476 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000138476 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000138476 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000138476 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138476 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138476 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000138476 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000138476 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000138476 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000138476 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138476 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000138476 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138476 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000138476 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000138476 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138476 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000138476 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138476 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000138476 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000138476 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000138477 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27.50% |
| C000138477 [Member] | Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.70% |
| C000138477 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 88.40% |
| C000138477 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138477 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000138477 [Member] | Affiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 92.30% |
| C000138477 [Member] | International equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.80% |
| C000138477 [Member] | Large blend [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.20% |
| C000138477 [Member] | Emerging market equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000138477 [Member] | Short term bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138477 [Member] | Emerging market debt [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000138477 [Member] | High yield bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000138477 [Member] | Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000138477 [Member] | Absolute return [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000138477 [Member] | Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138477 [Member] | Short term investments and other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000138477 [Member] | Equity Unaffiliated investment companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| C000138477 [Member] | Sector equity [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000138477 [Member] | Sector equity Alternative and specialty [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000138477 [Member] | Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
