v3.26.3
Shareholder Report
12 Months Ended
Aug. 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name JOHN HANCOCK FUNDS II
Entity Central Index Key 0001331971
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2026
C000106452 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class R6
Trading Symbol JULAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class R6/JULAX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Aggressive Portfolio (Class R6/JULAX) returned 20.72% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class R6/JULAX) 20.72% 8.10% 11.25%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000009055 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class R5
Trading Symbol JTLAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class R5/JTLAX)
$18 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 Lifestyle Aggressive Portfolio (Class R5/JTLAX) returned 20.64% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class R5/JTLAX) 20.64% 8.06% 11.19%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000009054 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class R4
Trading Symbol JSLAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class R4/JSLAX)
$40 0.36%
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.36%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Aggressive Portfolio (Class R4/JSLAX) returned 20.46% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class R4/JSLAX) 20.46% 7.85% 10.98%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000113497 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class R2
Trading Symbol JQLAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class R2/JQLAX)
$67 0.61%
Expenses Paid, Amount $ 67
Expense Ratio, Percent 0.61%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Aggressive Portfolio (Class R2/JQLAX) returned 20.09% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class R2/JQLAX) 20.09% 7.57% 10.69%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000155628 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class I
Trading Symbol JTAIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class I/JTAIX)
$24 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 Lifestyle Aggressive Portfolio (Class I/JTAIX) returned 20.61% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class I/JTAIX) 20.61% 8.01% 11.13%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000009052 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class C
Trading Symbol JCLAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class C/JCLAX)
$134 1.22%
Expenses Paid, Amount $ 134
Expense Ratio, Percent 1.22%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Aggressive Portfolio (Class C/JCLAX) returned 19.41% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class C/JCLAX) 18.41% 6.91% 10.02%
Multimanager Lifestyle Aggressive Portfolio (Class C/JCLAX)—excluding sales charge 19.41% 6.91% 10.02%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000009050 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class A
Trading Symbol JALAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class A/JALAX)
$57 0.52%
Expenses Paid, Amount $ 57
Expense Ratio, Percent 0.52%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Aggressive Portfolio (Class A/JALAX) returned 20.18% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class A/JALAX) 14.79% 6.68% 10.29%
Multimanager Lifestyle Aggressive Portfolio (Class A/JALAX)—excluding sales charge 20.18% 7.67% 10.80%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 or by calling 800-225-5291.
Net Assets $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000009056 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Aggressive Portfolio
Class Name Class 1
Trading Symbol JILAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Aggressive Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Aggressive Portfolio
(Class 1/JILAX)
$18 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 Lifestyle Aggressive Portfolio (Class 1/JILAX) returned 20.67% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, albeit to a much lesser extent than equities due to its lower return and modest portfolio weighting.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Aggressive Portfolio (Class 1/JILAX) 20.67% 8.07% 11.20%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Aggressive Target Allocation Index 19.39% 10.52% 12.74%
John Hancock Lifestyle Aggressive Index 22.90% 9.90% 12.10%
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 $ 3,275,684,137
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 2,418,232
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $3,275,684,137
Total number of portfolio holdings 75
Total advisory fees paid (net) $2,418,232
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 99.5%
Equity 93.2%
U.S. large cap 38.0%
International equity 28.2%
U.S. mid cap 10.3%
Emerging-market equity 7.3%
U.S. small cap 4.9%
Large blend 4.5%
Fixed income 2.7%
Short-term bond 1.8%
Emerging-market debt 0.5%
High yield bond 0.4%
Alternative and specialty 3.6%
Sector equity 3.1%
Absolute return 0.5%
U.S. Government 0.5%
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.
C000009068 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class 1
Trading Symbol JILBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class 1/JILBX)
$20 0.19%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.19%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class 1/JILBX) returned 13.91% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class 1/JILBX) 13.91% 5.56% 8.06%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000034075 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class 5
Trading Symbol JHLAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class 5/JHLAX)
$15 0.14%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.14%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class 5/JHLAX) returned 14.03% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class 5/JHLAX) 14.03% 5.62% 8.11%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000009062 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class A
Trading Symbol JALBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class A/JALBX)
$59 0.55%
Expenses Paid, Amount $ 59
Expense Ratio, Percent 0.55%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class A/JALBX) returned 13.51% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class A/JALBX) 8.44% 4.22% 7.17%
Multimanager Lifestyle Balanced Portfolio (Class A/JALBX)—excluding sales charge 13.51% 5.18% 7.67%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000009064 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class C
Trading Symbol JCLBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class C/JCLBX)
$133 1.25%
Expenses Paid, Amount $ 133
Expense Ratio, Percent 1.25%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class C/JCLBX) returned 12.72% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class C/JCLBX) 11.72% 4.46% 6.91%
Multimanager Lifestyle Balanced Portfolio (Class C/JCLBX)—excluding sales charge 12.72% 4.46% 6.91%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000155629 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class I
Trading Symbol JTBIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class I/JTBIX)
$27 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 Lifestyle Balanced Portfolio (Class I/JTBIX) returned 13.92% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class I/JTBIX) 13.92% 5.51% 7.99%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000113498 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class R2
Trading Symbol JQLBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class R2/JQLBX)
$68 0.64%
Expenses Paid, Amount $ 68
Expense Ratio, Percent 0.64%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class R2/JQLBX) returned 13.51% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class R2/JQLBX) 13.51% 5.10% 7.58%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000009066 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class R4
Trading Symbol JSLBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class R4/JSLBX)
$43 0.40%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.40%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class R4/JSLBX) returned 13.69% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class R4/JSLBX) 13.69% 5.36% 7.83%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000009067 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class R5
Trading Symbol JTSBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class R5/JTSBX)
$21 0.20%
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.20%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Balanced Portfolio (Class R5/JTSBX) returned 13.91% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class R5/JTSBX) 13.91% 5.57% 8.05%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000106453 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Balanced Portfolio
Class Name Class R6
Trading Symbol JULBX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Balanced Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Balanced Portfolio
(Class R6/JULBX)
$16 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 Lifestyle Balanced Portfolio (Class R6/JULBX) returned 14.03% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, emerging markets debt, and multi-sector bonds. Holdings in high yield bonds, bank loans, and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Balanced Portfolio (Class R6/JULBX) 14.03% 5.62% 8.10%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderate Target Allocation Index 13.14% 7.11% 9.07%
John Hancock Lifestyle Balanced Index 14.93% 6.23% 8.41%
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 or by calling 800-225-5291.
Net Assets $ 7,077,903,528
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 8,209,056
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $7,077,903,528
Total number of portfolio holdings 85
Total advisory fees paid (net) $8,209,056
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 95.1%
Equity 61.1%
U.S. large cap 21.7%
International equity 20.8%
U.S. mid cap 6.4%
Large blend 5.2%
Emerging-market equity 4.4%
U.S. small cap 2.6%
Fixed income 31.2%
Intermediate bond 13.1%
Multi-sector bond 5.8%
Emerging-market debt 3.5%
Short-term bond 3.3%
Bank loan 2.9%
High yield bond 2.6%
Alternative and specialty 2.8%
Sector equity 1.8%
Absolute return 0.5%
Multi-asset income 0.5%
U.S. Government 4.9%
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.
C000106454 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class R6
Trading Symbol JULCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class R6/JULCX)
$22 0.21%
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.21%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class R6/JULCX) returned 6.43% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class R6/JULCX) 6.43% 2.99% 4.34%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000009076 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class R5
Trading Symbol JTLRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class R5/JTLRX)
$26 0.25%
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.25%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class R5/JTLRX) returned 6.28% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class R5/JTLRX) 6.28% 2.92% 4.28%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000009075 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class R4
Trading Symbol JSLCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class R4/JSLCX)
$46 0.45%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.45%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class R4/JSLCX) returned 6.08% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class R4/JSLCX) 6.08% 2.72% 4.07%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000113499 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class R2
Trading Symbol JQLCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class R2/JQLCX)
$70 0.68%
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.68%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class R2/JQLCX) returned 5.91% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class R2/JQLCX) 5.91% 2.49% 3.84%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000155630 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class I
Trading Symbol JTOIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class I/JTOIX)
$32 0.31%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.31%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class I/JTOIX) returned 6.31% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class I/JTOIX) 6.31% 2.88% 4.24%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000009073 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class C
Trading Symbol JCLCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class C/JCLCX)
$134 1.31%
Expenses Paid, Amount $ 134
Expense Ratio, Percent 1.31%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class C/JCLCX) returned 5.25% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class C/JCLCX) 4.25% 1.86% 3.19%
Multimanager Lifestyle Conservative Portfolio (Class C/JCLCX)—excluding sales charge 5.25% 1.86% 3.19%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000009071 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class A
Trading Symbol JALRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class A/JALRX)
$63 0.61%
Expenses Paid, Amount $ 63
Expense Ratio, Percent 0.61%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class A/JALRX) returned 5.98% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class A/JALRX) 1.21% 1.63% 3.44%
Multimanager Lifestyle Conservative Portfolio (Class A/JALRX)—excluding sales charge 5.98% 2.57% 3.92%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 or by calling 800-225-5291.
Net Assets $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000009077 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Conservative Portfolio
Class Name Class 1
Trading Symbol JILCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Conservative Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Conservative Portfolio
(Class 1/JILCX)
$26 0.25%
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.25%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Conservative Portfolio (Class 1/JILCX) returned 6.38% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in multi-sector bonds, high yield bonds, short-term bonds, bank loans, and short-term U.S. Treasury Inflation Protected Securities aided returns as well.
TOP PERFORMANCE DETRACTORS
No detractors | At a time of positive returns for most segments of the financial markets, none of the fund’s holdings detracted from absolute performance.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Conservative Portfolio (Class 1/JILCX) 6.38% 2.95% 4.30%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Conservative Target Allocation Index 6.35% 2.97% 4.44%
John Hancock Lifestyle Conservative Index 6.58% 3.08% 4.53%
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 $ 1,422,833,140
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,431,019
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,422,833,140
Total number of portfolio holdings 26
Total advisory fees paid (net) $2,431,019
Portfolio turnover rate 13%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.1%
Equity 21.7%
International equity 7.6%
U.S. large cap 5.9%
Large blend 4.4%
U.S. mid cap 2.3%
U.S. small cap 0.9%
Emerging-market equity 0.6%
Fixed income 66.4%
Intermediate bond 32.7%
Multi-sector bond 8.5%
Short-term bond 7.7%
Emerging-market debt 6.5%
Bank loan 5.7%
High yield bond 5.3%
Alternative and specialty 2.0%
Multi-asset income 2.0%
U.S. Government 9.8%
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.
C000009086 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class 1
Trading Symbol JILGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class 1/JILGX)
$19 0.17%
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.17%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class 1/JILGX) returned 17.72% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class 1/JILGX) 17.72% 7.09% 9.82%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000034076 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class 5
Trading Symbol JHLGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class 5/JHLGX)
$13 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 Lifestyle Growth Portfolio (Class 5/JHLGX) returned 17.90% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class 5/JHLGX) 17.90% 7.15% 9.88%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000009080 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class A
Trading Symbol JALGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class A/JALGX)
$58 0.53%
Expenses Paid, Amount $ 58
Expense Ratio, Percent 0.53%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class A/JALGX) returned 17.43% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class A/JALGX) 12.16% 5.74% 8.93%
Multimanager Lifestyle Growth Portfolio (Class A/JALGX)—excluding sales charge 17.43% 6.72% 9.43%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000009082 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class C
Trading Symbol JCLGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class C/JCLGX)
$133 1.23%
Expenses Paid, Amount $ 133
Expense Ratio, Percent 1.23%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class C/JCLGX) returned 16.55% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class C/JCLGX) 15.55% 5.97% 8.66%
Multimanager Lifestyle Growth Portfolio (Class C/JCLGX)—excluding sales charge 16.55% 5.97% 8.66%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000155631 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class I
Trading Symbol JTGIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class I/JTGIX)
$25 0.23%
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.23%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class I/JTGIX) returned 17.77% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class I/JTGIX) 17.77% 7.03% 9.76%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000113500 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class R2
Trading Symbol JQLGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class R2/JQLGX)
$67 0.62%
Expenses Paid, Amount $ 67
Expense Ratio, Percent 0.62%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class R2/JQLGX) returned 17.28% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class R2/JQLGX) 17.28% 6.62% 9.33%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000009084 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class R4
Trading Symbol JSLGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class R4/JSLGX)
$41 0.38%
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.38%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class R4/JSLGX) returned 17.55% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class R4/JSLGX) 17.55% 6.88% 9.59%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000009085 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class R5
Trading Symbol JTLGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class R5/JTLGX)
$20 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 Lifestyle Growth Portfolio (Class R5/JTLGX) returned 17.82% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class R5/JTLGX) 17.82% 7.10% 9.82%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000106455 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Growth Portfolio
Class Name Class R6
Trading Symbol JULGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Growth Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Growth Portfolio
(Class R6/JULGX)
$14 0.13%
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.13%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Growth Portfolio (Class R6/JULGX) returned 17.84% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds and emerging markets debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Growth Portfolio (Class R6/JULGX) 17.84% 7.14% 9.87%
S&P 500 Index 20.38% 12.79% 15.37%
Morningstar U.S. Moderately Aggressive Target Allocation Index 16.60% 8.89% 10.94%
John Hancock Lifestyle Growth Index 19.41% 8.46% 10.59%
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 or by calling 800-225-5291.
Net Assets $ 8,421,057,018
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 7,904,648
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $8,421,057,018
Total number of portfolio holdings 85
Total advisory fees paid (net) $7,904,648
Portfolio turnover rate 11%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 97.5%
Equity 80.2%
U.S. large cap 31.2%
International equity 27.2%
U.S. mid cap 8.4%
Emerging-market equity 5.6%
Large blend 4.0%
U.S. small cap 3.8%
Fixed income 14.3%
Intermediate bond 5.7%
Multi-sector bond 2.2%
Emerging-market debt 1.9%
Short-term bond 1.9%
Bank loan 1.4%
High yield bond 1.2%
Alternative and specialty 3.0%
Sector equity 2.5%
Absolute return 0.5%
U.S. Government 2.5%
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.
C000106456 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class R6
Trading Symbol JULMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class R6/JULMX)
$18 0.17%
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.17%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class R6/JULMX) returned 10.20% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class R6/JULMX) 10.20% 4.30% 6.20%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000009104 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class R5
Trading Symbol JTLMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class R5/JTLMX)
$23 0.22%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.22%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class R5/JTLMX) returned 10.12% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class R5/JTLMX) 10.12% 4.25% 6.14%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000009103 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class R4
Trading Symbol JSLMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class R4/JSLMX)
$44 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 Lifestyle Moderate Portfolio (Class R4/JSLMX) returned 9.90% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class R4/JSLMX) 9.90% 4.05% 5.93%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000113501 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class R2
Trading Symbol JQLMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class R2/JQLMX)
$70 0.67%
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.67%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class R2/JQLMX) returned 9.67% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class R2/JQLMX) 9.67% 3.80% 5.68%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000155632 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class I
Trading Symbol JTMIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class I/JTMIX)
$29 0.28%
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.28%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class I/JTMIX) returned 9.98% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class I/JTMIX) 9.98% 4.18% 6.08%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000009101 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class C
Trading Symbol JCLMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class C/JCLMX)
$134 1.28%
Expenses Paid, Amount $ 134
Expense Ratio, Percent 1.28%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class C/JCLMX) returned 9.00% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class C/JCLMX) 8.00% 3.16% 5.02%
Multimanager Lifestyle Moderate Portfolio (Class C/JCLMX)—excluding sales charge 9.00% 3.16% 5.02%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000009099 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class A
Trading Symbol JALMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class A/JALMX)
$61 0.58%
Expenses Paid, Amount $ 61
Expense Ratio, Percent 0.58%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class A/JALMX) returned 9.73% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class A/JALMX) 4.83% 2.94% 5.29%
Multimanager Lifestyle Moderate Portfolio (Class A/JALMX)—excluding sales charge 9.73% 3.89% 5.77%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 or by calling 800-225-5291.
Net Assets $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000034077 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class 5
Trading Symbol JHLMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class 5/JHLMX)
$18 0.17%
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.17%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class 5/JHLMX) returned 10.12% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class 5/JHLMX) 10.12% 4.31% 6.20%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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.
C000009105 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager Lifestyle Moderate Portfolio
Class Name Class 1
Trading Symbol JILMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager Lifestyle Moderate Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager Lifestyle Moderate Portfolio
(Class 1/JILMX)
$23 0.22%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.22%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager Lifestyle Moderate Portfolio (Class 1/JILMX) returned 10.12% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made the most significant contribution to absolute performance, including the fund’s sizable allocation to large caps. International developed market equities further helped results, as did emerging market stocks. The real assets portfolio was an additional contributor with strong returns for the energy and metals & mining sectors.
Bond funds | The fixed-income allocation also contributed, led by intermediate-term bonds, multi-sector bonds, and emerging markets debt. Holdings in high yield bonds, short-term bonds, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager Lifestyle Moderate Portfolio (Class 1/JILMX) 10.12% 4.27% 6.16%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
Morningstar U.S. Moderately Conservative Target Allocation Index 9.58% 4.86% 6.49%
John Hancock Lifestyle Moderate Index 10.70% 4.52% 6.41%
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 $ 1,931,239,996
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 2,651,643
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,931,239,996
Total number of portfolio holdings 84
Total advisory fees paid (net) $2,651,643
Portfolio turnover rate 12%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 41.3%
International equity 14.1%
U.S. large cap 13.9%
Large blend 4.7%
U.S. mid cap 4.5%
Emerging-market equity 2.8%
U.S. small cap 1.3%
Fixed income 48.7%
Intermediate bond 22.9%
Multi-sector bond 6.9%
Short-term bond 5.7%
Emerging-market debt 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 3.3%
Multi-asset income 1.5%
Sector equity 1.3%
Absolute return 0.5%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2010 Lifetime Portfolio
(Class 1/JLAOX)
$5 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 8.50% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2010 Lifetime Portfolio (Class 1/JLAOX) 8.50% 4.04% 5.88%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2010 Index 8.49% 4.37% 5.78%
John Hancock 2010 Lifetime Index 8.78% 4.27% 5.94%
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 $ 103,722,439
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 27.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $103,722,439
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 27%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 87.6%
Equity 22.6%
International equity 9.5%
Large blend 7.6%
U.S. large cap 5.5%
Fixed income 60.3%
Intermediate bond 29.4%
Short-term bond 12.4%
Emerging-market debt 5.3%
Multi-sector bond 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.9%
Equity 2.9%
U.S. Government 9.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2010 Lifetime Portfolio
(Class A/JLAAX)
$43 0.41%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2010 Lifetime Portfolio (Class A/JLAAX) returned 8.13% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2010 Lifetime Portfolio (Class A/JLAAX) 2.68% 2.59% 4.95%
Multimanager 2010 Lifetime Portfolio (Class A/JLAAX)—excluding sales charge 8.13% 3.66% 5.49%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2010 Index 8.49% 4.37% 5.78%
John Hancock 2010 Lifetime Index 8.78% 4.27% 5.94%
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 or by calling 800-225-5291.
Net Assets $ 103,722,439
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 27.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $103,722,439
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 27%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 87.6%
Equity 22.6%
International equity 9.5%
Large blend 7.6%
U.S. large cap 5.5%
Fixed income 60.3%
Intermediate bond 29.4%
Short-term bond 12.4%
Emerging-market debt 5.3%
Multi-sector bond 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.9%
Equity 2.9%
U.S. Government 9.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2010 Lifetime Portfolio
(Class I/JHRLX)
$11 0.11%
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2010 Lifetime Portfolio (Class I/JHRLX) returned 8.44% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2010 Lifetime Portfolio (Class I/JHRLX) 8.44% 3.97% 5.81%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2010 Index 8.49% 4.37% 5.78%
John Hancock 2010 Lifetime Index 8.78% 4.27% 5.94%
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 or by calling 800-225-5291.
Net Assets $ 103,722,439
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 27.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $103,722,439
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 27%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 87.6%
Equity 22.6%
International equity 9.5%
Large blend 7.6%
U.S. large cap 5.5%
Fixed income 60.3%
Intermediate bond 29.4%
Short-term bond 12.4%
Emerging-market debt 5.3%
Multi-sector bond 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.9%
Equity 2.9%
U.S. Government 9.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2010 Lifetime Portfolio
(Class R2/JLAEX)
$53 0.51%
Expenses Paid, Amount $ 53
Expense Ratio, Percent 0.51%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2010 Lifetime Portfolio (Class R2/JLAEX) returned 7.92% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2010 Lifetime Portfolio (Class R2/JLAEX) 7.92% 3.58% 5.41%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2010 Index 8.49% 4.37% 5.78%
John Hancock 2010 Lifetime Index 8.78% 4.27% 5.94%
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 or by calling 800-225-5291.
Net Assets $ 103,722,439
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 27.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $103,722,439
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 27%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 87.6%
Equity 22.6%
International equity 9.5%
Large blend 7.6%
U.S. large cap 5.5%
Fixed income 60.3%
Intermediate bond 29.4%
Short-term bond 12.4%
Emerging-market debt 5.3%
Multi-sector bond 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.9%
Equity 2.9%
U.S. Government 9.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2010 Lifetime Portfolio
(Class R6/JLAIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2010 Lifetime Portfolio (Class R6/JLAIX) returned 8.55% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2010 Lifetime Portfolio (Class R6/JLAIX) 8.55% 4.08% 5.94%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2010 Index 8.49% 4.37% 5.78%
John Hancock 2010 Lifetime Index 8.78% 4.27% 5.94%
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 or by calling 800-225-5291.
Net Assets $ 103,722,439
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 27.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $103,722,439
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 27%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 87.6%
Equity 22.6%
International equity 9.5%
Large blend 7.6%
U.S. large cap 5.5%
Fixed income 60.3%
Intermediate bond 29.4%
Short-term bond 12.4%
Emerging-market debt 5.3%
Multi-sector bond 5.0%
Bank loan 4.3%
High yield bond 3.9%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.9%
Equity 2.9%
U.S. Government 9.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class R6/JLBJX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2015 Lifetime Portfolio (Class R6/JLBJX) returned 9.69% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class R6/JLBJX) 9.69% 4.31% 6.46%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 or by calling 800-225-5291.
Net Assets $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class R5/JLBHX)
$6 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 9.66% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class R5/JLBHX) 9.66% 4.22% 6.38%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 or by calling 800-225-5291.
Net Assets $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class R4/JLBGX)
$17 0.16%
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.16%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2015 Lifetime Portfolio (Class R4/JLBGX) returned 9.41% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class R4/JLBGX) 9.41% 4.15% 6.30%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 or by calling 800-225-5291.
Net Assets $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class R2/JLBKX)
$52 0.50%
Expenses Paid, Amount $ 52
Expense Ratio, Percent 0.50%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2015 Lifetime Portfolio (Class R2/JLBKX) returned 9.11% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class R2/JLBKX) 9.11% 3.77% 5.91%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 or by calling 800-225-5291.
Net Assets $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class I/JHREX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2015 Lifetime Portfolio (Class I/JHREX) returned 9.46% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class I/JHREX) 9.46% 4.16% 6.33%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 or by calling 800-225-5291.
Net Assets $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class A/JLBAX)
$43 0.41%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2015 Lifetime Portfolio (Class A/JLBAX) returned 9.26% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class A/JLBAX) 3.77% 2.83% 5.47%
Multimanager 2015 Lifetime Portfolio (Class A/JLBAX)—excluding sales charge 9.26% 3.88% 6.01%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 or by calling 800-225-5291.
Net Assets $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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.
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2015 Lifetime Portfolio
(Class 1/JLBOX)
$5 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 9.53% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2015 Lifetime Portfolio (Class 1/JLBOX) 9.53% 4.25% 6.40%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2015 Index 9.24% 4.64% 6.28%
John Hancock 2015 Lifetime Index 10.13% 4.60% 6.51%
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 $ 156,355,554
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $156,355,554
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 30%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 89.1%
Equity 29.2%
International equity 11.8%
Large blend 8.8%
U.S. large cap 7.6%
U.S. mid cap 1.0%
Fixed income 55.2%
Intermediate bond 28.1%
Short-term bond 10.2%
Emerging-market debt 5.0%
Multi-sector bond 4.8%
High yield bond 3.6%
Bank loan 3.5%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 2.8%
Equity 2.8%
U.S. Government 8.1%
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.
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class 1/JLDOX)
$5 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 10.91% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class 1/JLDOX) 10.91% 4.45% 7.04%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class A/JLDAX)
$43 0.41%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2020 Lifetime Portfolio (Class A/JLDAX) returned 10.50% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class A/JLDAX) 4.94% 3.02% 6.10%
Multimanager 2020 Lifetime Portfolio (Class A/JLDAX)—excluding sales charge 10.50% 4.08% 6.64%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 or by calling 800-225-5291.
Net Assets $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class I/JHRVX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2020 Lifetime Portfolio (Class I/JHRVX) returned 10.80% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class I/JHRVX) 10.80% 4.41% 6.98%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 or by calling 800-225-5291.
Net Assets $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class R2/JLDEX)
$52 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 10.36% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class R2/JLDEX) 10.36% 3.99% 6.55%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 or by calling 800-225-5291.
Net Assets $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class R4/JLDGX)
$27 0.26%
Expenses Paid, Amount $ 27
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 10.63% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class R4/JLDGX) 10.63% 4.23% 6.81%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 or by calling 800-225-5291.
Net Assets $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class R5/JLDHX)
$5 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 R5/JLDHX) returned 10.78% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class R5/JLDHX) 10.78% 4.44% 7.02%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 or by calling 800-225-5291.
Net Assets $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2020 Lifetime Portfolio
(Class R6/JLDIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2020 Lifetime Portfolio (Class R6/JLDIX) returned 10.87% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2020 Lifetime Portfolio (Class R6/JLDIX) 10.87% 4.49% 7.08%
Bloomberg U.S. Aggregate Bond Index 1.89% (0.29)% 1.40%
S&P Target Date 2020 Index 9.98% 5.06% 6.78%
John Hancock 2020 Lifetime Index 11.51% 4.94% 7.26%
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 or by calling 800-225-5291.
Net Assets $ 334,617,817
Holdings Count | Holding 91
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $334,617,817
Total number of portfolio holdings 91
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 90.0%
Equity 35.3%
International equity 13.9%
Large blend 10.8%
U.S. large cap 8.0%
U.S. mid cap 1.8%
U.S. small cap 0.4%
Emerging-market equity 0.4%
Fixed income 50.0%
Intermediate bond 26.0%
Short-term bond 8.5%
Emerging-market debt 4.7%
Multi-sector bond 4.5%
High yield bond 3.5%
Bank loan 2.8%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 6.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class R6/JLEIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2025 Lifetime Portfolio (Class R6/JLEIX) returned 12.20% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class R6/JLEIX) 12.20% 4.81% 7.93%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 or by calling 800-225-5291.
Net Assets $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class R5/JLEHX)
$6 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 2025 Lifetime Portfolio (Class R5/JLEHX) returned 12.13% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class R5/JLEHX) 12.13% 4.75% 7.87%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 or by calling 800-225-5291.
Net Assets $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class R4/JLEGX)
$26 0.25%
Expenses Paid, Amount $ 26
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 11.88% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class R4/JLEGX) 11.88% 4.55% 7.66%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 or by calling 800-225-5291.
Net Assets $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class R2/JLEEX)
$53 0.50%
Expenses Paid, Amount $ 53
Expense Ratio, Percent 0.50%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2025 Lifetime Portfolio (Class R2/JLEEX) returned 11.69% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class R2/JLEEX) 11.69% 4.29% 7.40%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 or by calling 800-225-5291.
Net Assets $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class I/JHRNX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2025 Lifetime Portfolio (Class I/JHRNX) returned 12.14% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class I/JHRNX) 12.14% 4.70% 7.83%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 or by calling 800-225-5291.
Net Assets $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class A/JLEAX)
$43 0.41%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2025 Lifetime Portfolio (Class A/JLEAX) returned 11.65% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class A/JLEAX) 6.06% 3.30% 6.93%
Multimanager 2025 Lifetime Portfolio (Class A/JLEAX)—excluding sales charge 11.65% 4.36% 7.48%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 or by calling 800-225-5291.
Net Assets $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2025 Lifetime Portfolio
(Class 1/JLEOX)
$5 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 12.13% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2025 Lifetime Portfolio (Class 1/JLEOX) 12.13% 4.76% 7.87%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2025 Index 11.58% 5.68% 7.63%
John Hancock 2025 Lifetime Index 12.95% 5.33% 8.23%
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 $ 650,919,838
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $650,919,838
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 91.5%
Equity 41.9%
International equity 15.8%
U.S. large cap 11.3%
Large blend 10.5%
U.S. mid cap 2.6%
Emerging-market equity 1.2%
U.S. small cap 0.5%
Fixed income 44.9%
Intermediate bond 24.1%
Short-term bond 6.7%
Emerging-market debt 4.5%
Multi-sector bond 4.3%
High yield bond 3.3%
Bank loan 2.0%
Alternative and specialty 4.7%
Sector equity 4.2%
Absolute return 0.5%
Unaffiliated investment companies 3.3%
Equity 3.3%
U.S. Government 5.2%
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.
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class 1/JLFOX)
$5 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 14.21% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class 1/JLFOX) 14.21% 5.53% 8.88%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class A/JLFAX)
$44 0.41%
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2030 Lifetime Portfolio (Class A/JLFAX) returned 13.75% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class A/JLFAX) 8.10% 4.07% 7.92%
Multimanager 2030 Lifetime Portfolio (Class A/JLFAX)—excluding sales charge 13.75% 5.15% 8.48%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 or by calling 800-225-5291.
Net Assets $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class I/JHRGX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2030 Lifetime Portfolio (Class I/JHRGX) returned 14.11% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class I/JHRGX) 14.11% 5.46% 8.81%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 or by calling 800-225-5291.
Net Assets $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class R2/JLFEX)
$53 0.50%
Expenses Paid, Amount $ 53
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 13.61% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class R2/JLFEX) 13.61% 5.05% 8.38%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 or by calling 800-225-5291.
Net Assets $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class R4/JLFGX)
$27 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 13.93% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class R4/JLFGX) 13.93% 5.30% 8.64%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 or by calling 800-225-5291.
Net Assets $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class R5/JLFHX)
$5 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 R5/JLFHX) returned 14.11% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class R5/JLFHX) 14.11% 5.50% 8.86%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 or by calling 800-225-5291.
Net Assets $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2030 Lifetime Portfolio
(Class R6/JLFIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2030 Lifetime Portfolio (Class R6/JLFIX) returned 14.27% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in short-term bonds, high yield bonds, multi-sector bonds, short-term U.S. Treasury Inflation Protected Securities, and bank loans aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2030 Lifetime Portfolio (Class R6/JLFIX) 14.27% 5.57% 8.92%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2030 Index 13.47% 6.63% 8.60%
John Hancock 2030 Lifetime Index 15.22% 6.27% 9.37%
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 or by calling 800-225-5291.
Net Assets $ 1,086,197,376
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,086,197,376
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 92.4%
Equity 51.6%
International equity 19.7%
U.S. large cap 15.1%
Large blend 10.6%
U.S. mid cap 3.7%
Emerging-market equity 2.1%
U.S. small cap 0.4%
Fixed income 36.6%
Intermediate bond 20.6%
Short-term bond 5.5%
Emerging-market debt 3.7%
Multi-sector bond 2.8%
High yield bond 2.7%
Bank loan 1.3%
Alternative and specialty 4.2%
Sector equity 3.7%
Absolute return 0.5%
Unaffiliated investment companies 3.9%
Equity 3.9%
U.S. Government 3.7%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class R6/JLHIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2035 Lifetime Portfolio (Class R6/JLHIX) returned 16.23% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class R6/JLHIX) 16.23% 6.40% 9.82%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 or by calling 800-225-5291.
Net Assets $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class R5/JLHHX)
$5 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 R5/JLHHX) returned 16.25% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class R5/JLHHX) 16.25% 6.35% 9.76%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 or by calling 800-225-5291.
Net Assets $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class R4/JLHGX)
$28 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 2035 Lifetime Portfolio (Class R4/JLHGX) returned 16.00% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class R4/JLHGX) 16.00% 6.18% 9.55%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 or by calling 800-225-5291.
Net Assets $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class R2/JLHEX)
$54 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 2035 Lifetime Portfolio (Class R2/JLHEX) returned 15.74% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class R2/JLHEX) 15.74% 5.88% 9.27%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 or by calling 800-225-5291.
Net Assets $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class I/JHRMX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2035 Lifetime Portfolio (Class I/JHRMX) returned 16.20% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class I/JHRMX) 16.20% 6.27% 9.68%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 or by calling 800-225-5291.
Net Assets $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class A/JLHAX)
$44 0.41%
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2035 Lifetime Portfolio (Class A/JLHAX) returned 15.77% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class A/JLHAX) 9.97% 4.90% 8.82%
Multimanager 2035 Lifetime Portfolio (Class A/JLHAX)—excluding sales charge 15.77% 5.99% 9.38%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 or by calling 800-225-5291.
Net Assets $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2035 Lifetime Portfolio
(Class 1/JLHOX)
$5 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 16.25% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2035 Lifetime Portfolio (Class 1/JLHOX) 16.25% 6.36% 9.78%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2035 Index 15.65% 7.70% 9.66%
John Hancock 2035 Lifetime Index 17.40% 7.26% 10.41%
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 $ 1,190,623,703
Holdings Count | Holding 92
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,190,623,703
Total number of portfolio holdings 92
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.0%
Equity 62.5%
International equity 22.5%
U.S. large cap 19.4%
Large blend 12.5%
U.S. mid cap 4.8%
Emerging-market equity 2.7%
U.S. small cap 0.6%
Fixed income 27.1%
Intermediate bond 17.3%
Short-term bond 3.5%
Emerging-market debt 3.0%
High yield bond 2.1%
Multi-sector bond 0.7%
Bank loan 0.5%
Alternative and specialty 3.4%
Sector equity 2.9%
Absolute return 0.5%
Unaffiliated investment companies 5.0%
Equity 5.0%
U.S. Government 2.0%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class 1/JLIOX)
$5 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 17.89% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class 1/JLIOX) 17.89% 7.22% 10.59%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class A/JLIAX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2040 Lifetime Portfolio (Class A/JLIAX) returned 17.49% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class A/JLIAX) 11.63% 5.74% 9.62%
Multimanager 2040 Lifetime Portfolio (Class A/JLIAX)—excluding sales charge 17.49% 6.83% 10.19%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 or by calling 800-225-5291.
Net Assets $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class I/JHRDX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2040 Lifetime Portfolio (Class I/JHRDX) returned 17.90% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class I/JHRDX) 17.90% 7.15% 10.52%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 or by calling 800-225-5291.
Net Assets $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class R2/JLIEX)
$54 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 2040 Lifetime Portfolio (Class R2/JLIEX) returned 17.51% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class R2/JLIEX) 17.51% 6.74% 10.09%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 or by calling 800-225-5291.
Net Assets $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class R4/JLIGX)
$27 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 17.74% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class R4/JLIGX) 17.74% 7.01% 10.37%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 or by calling 800-225-5291.
Net Assets $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class R5/JLIHX)
$5 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 R5/JLIHX) returned 17.94% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class R5/JLIHX) 17.94% 7.20% 10.58%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 or by calling 800-225-5291.
Net Assets $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2040 Lifetime Portfolio
(Class R6/JLIIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2040 Lifetime Portfolio (Class R6/JLIIX) returned 17.97% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in international real estate investment trusts and U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2040 Lifetime Portfolio (Class R6/JLIIX) 17.97% 7.26% 10.63%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2040 Index 17.78% 8.72% 10.53%
John Hancock 2040 Lifetime Index 19.30% 8.33% 11.39%
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 or by calling 800-225-5291.
Net Assets $ 1,058,913,843
Holdings Count | Holding 87
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,058,913,843
Total number of portfolio holdings 87
Total advisory fees paid (net) $0
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.8%
Equity 72.4%
International equity 25.2%
U.S. large cap 22.7%
Large blend 14.5%
U.S. mid cap 6.0%
Emerging-market equity 3.1%
U.S. small cap 0.9%
Fixed income 19.0%
Intermediate bond 11.9%
Short-term bond 2.7%
Emerging-market debt 2.3%
High yield bond 1.6%
Multi-sector bond 0.5%
Alternative and specialty 2.4%
Sector equity 1.9%
Absolute return 0.5%
Unaffiliated investment companies 5.4%
Equity 5.4%
U.S. Government 0.8%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class R6/JLJIX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2045 Lifetime Portfolio (Class R6/JLJIX) returned 19.41% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class R6/JLJIX) 19.41% 8.02% 11.16%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 or by calling 800-225-5291.
Net Assets $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class R5/JLJHX)
$5 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 2045 Lifetime Portfolio (Class R5/JLJHX) returned 19.36% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class R5/JLJHX) 19.36% 7.98% 11.12%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 or by calling 800-225-5291.
Net Assets $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class R4/JLJGX)
$27 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 2045 Lifetime Portfolio (Class R4/JLJGX) returned 19.18% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class R4/JLJGX) 19.18% 7.76% 10.89%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 or by calling 800-225-5291.
Net Assets $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class R2/JLJEX)
$55 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 18.87% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class R2/JLJEX) 18.87% 7.50% 10.61%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 or by calling 800-225-5291.
Net Assets $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class I/JHROX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2045 Lifetime Portfolio (Class I/JHROX) returned 19.30% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class I/JHROX) 19.30% 7.90% 11.03%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 or by calling 800-225-5291.
Net Assets $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class A/JLJAX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2045 Lifetime Portfolio (Class A/JLJAX) returned 18.91% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class A/JLJAX) 12.96% 6.49% 10.15%
Multimanager 2045 Lifetime Portfolio (Class A/JLJAX)—excluding sales charge 18.91% 7.59% 10.71%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 or by calling 800-225-5291.
Net Assets $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2045 Lifetime Portfolio
(Class 1/JLJOX)
$5 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 2045 Lifetime Portfolio (Class 1/JLJOX) returned 19.43% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by intermediate-term bonds and emerging markets debt. Holdings in high yield bonds and short-term bonds aided returns as well.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2045 Lifetime Portfolio (Class 1/JLJOX) 19.43% 7.98% 11.12%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2045 Index 19.33% 9.45% 11.11%
John Hancock 2045 Lifetime Index 21.02% 9.28% 12.03%
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 $ 1,024,345,141
Holdings Count | Holding 85
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $1,024,345,141
Total number of portfolio holdings 85
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.6%
Equity 81.1%
International equity 26.9%
U.S. large cap 26.0%
Large blend 15.3%
U.S. mid cap 7.4%
Emerging-market equity 4.3%
U.S. small cap 1.2%
Fixed income 11.0%
Intermediate bond 6.3%
Short-term bond 2.3%
Emerging-market debt 1.4%
High yield bond 1.0%
Alternative and specialty 1.5%
Sector equity 1.0%
Absolute return 0.5%
Unaffiliated investment companies 5.8%
Equity 5.8%
U.S. Government 0.6%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class 1/JLKOX)
$6 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 20.46% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class 1/JLKOX) 20.46% 8.41% 11.32%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class A/JLKAX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2050 Lifetime Portfolio (Class A/JLKAX) returned 19.97% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class A/JLKAX) 13.94% 6.92% 10.36%
Multimanager 2050 Lifetime Portfolio (Class A/JLKAX)—excluding sales charge 19.97% 8.02% 10.92%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class I/JHRPX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2050 Lifetime Portfolio (Class I/JHRPX) returned 20.38% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class I/JHRPX) 20.38% 8.35% 11.25%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class R2/JLKEX)
$55 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 19.89% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class R2/JLKEX) 19.89% 7.92% 10.82%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class R4/JLKGX)
$28 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 20.13% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class R4/JLKGX) 20.13% 8.18% 11.09%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class R5/JLKHX)
$6 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 R5/JLKHX) returned 20.42% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class R5/JLKHX) 20.42% 8.42% 11.33%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2050 Lifetime Portfolio
(Class R6/JLKRX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2050 Lifetime Portfolio (Class R6/JLKRX) returned 20.46% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns. The real assets portfolio was an additional contributor with strong returns for energy stocks and the metals & mining sector.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, small positions in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) were adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2050 Lifetime Portfolio (Class R6/JLKRX) 20.46% 8.47% 11.38%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2050 Index 19.92% 9.75% 11.41%
John Hancock 2050 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 697,641,979
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 21.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $697,641,979
Total number of portfolio holdings 84
Total advisory fees paid (net) $0
Portfolio turnover rate 21%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 88.4%
U.S. large cap 29.3%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.6%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 4.2%
Short-term bond 2.4%
Intermediate bond 0.9%
Emerging-market debt 0.6%
High yield bond 0.3%
Alternative and specialty 0.7%
Absolute return 0.4%
Sector equity 0.3%
Unaffiliated investment companies 6.2%
Equity 6.2%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class R6/JLKTX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2055 Lifetime Portfolio (Class R6/JLKTX) returned 20.41% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class R6/JLKTX) 20.41% 8.45% 11.38%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class R5/JLKSX)
$6 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 20.35% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class R5/JLKSX) 20.35% 8.39% 11.32%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class R4/JLKQX)
$19 0.17%
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.17%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2055 Lifetime Portfolio (Class R4/JLKQX) returned 20.32% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class R4/JLKQX) 20.32% 8.31% 11.21%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class R2/JLKNX)
$55 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 19.84% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class R2/JLKNX) 19.84% 7.90% 10.84%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class I/JHRTX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2055 Lifetime Portfolio (Class I/JHRTX) returned 20.40% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class I/JHRTX) 20.40% 8.34% 11.25%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class A/JLKLX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2055 Lifetime Portfolio (Class A/JLKLX) returned 19.99% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class A/JLKLX) 14.01% 6.92% 10.35%
Multimanager 2055 Lifetime Portfolio (Class A/JLKLX)—excluding sales charge 19.99% 8.02% 10.92%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2055 Lifetime Portfolio
(Class 1/JLKUX)
$6 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 20.47% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2055 Lifetime Portfolio (Class 1/JLKUX) 20.47% 8.41% 11.33%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2055 Index 20.42% 9.92% 11.57%
John Hancock 2055 Lifetime Index 22.43% 9.89% 12.34%
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 $ 482,927,299
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $482,927,299
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class 1/JRETX)
$6 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 20.42% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class 1/JRETX) 20.42% 8.43% 11.34%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class A/JJERX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2060 Lifetime Portfolio (Class A/JJERX) returned 19.98% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class A/JJERX) 13.98% 6.93% 10.36%
Multimanager 2060 Lifetime Portfolio (Class A/JJERX)—excluding sales charge 19.98% 8.03% 10.93%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class I/JMENX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2060 Lifetime Portfolio (Class I/JMENX) returned 20.42% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class I/JMENX) 20.42% 8.39% 11.28%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class R2/JVIMX)
$55 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 2060 Lifetime Portfolio (Class R2/JVIMX) returned 19.89% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class R2/JVIMX) 19.89% 7.94% 10.92%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class R4/JROUX)
$28 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 2060 Lifetime Portfolio (Class R4/JROUX) returned 20.17% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class R4/JROUX) 20.17% 8.25% 11.18%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class R5/JGHTX)
$6 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 R5/JGHTX) returned 20.37% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class R5/JGHTX) 20.37% 8.42% 11.34%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2060 Lifetime Portfolio
(Class R6/JESRX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2060 Lifetime Portfolio (Class R6/JESRX) returned 20.46% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years 10 Years
Multimanager 2060 Lifetime Portfolio (Class R6/JESRX) 20.46% 8.47% 11.39%
S&P 500 Index 20.38% 12.79% 15.37%
S&P Target Date 2060+ Index 20.42% 9.93% 11.64%
John Hancock 2060 Lifetime Index 22.43% 9.89% 12.34%
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 or by calling 800-225-5291.
Net Assets $ 358,277,199
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $358,277,199
Total number of portfolio holdings 83
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.0%
U.S. large cap 29.5%
International equity 27.1%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.4%
Fixed income 3.7%
Short-term bond 2.4%
Emerging-market debt 0.5%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.5%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class R6/JABEX)
$0 0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2065 Lifetime Portfolio (Class R6/JABEX) returned 20.49% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class R6/JABEX) 20.49% 8.50% 13.01%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 or by calling 800-225-5291.
Net Assets $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class R5/JABDX)
$6 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 20.44% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class R5/JABDX) 20.44% 8.47% 12.98%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 or by calling 800-225-5291.
Net Assets $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class R4/JABBX)
$19 0.17%
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.17%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2065 Lifetime Portfolio (Class R4/JABBX) returned 20.24% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class R4/JABBX) 20.24% 8.34% 12.83%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 or by calling 800-225-5291.
Net Assets $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class R2/JAAZX)
$55 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 2065 Lifetime Portfolio (Class R2/JAAZX) returned 20.02% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class R2/JAAZX) 20.02% 8.15% 12.65%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 or by calling 800-225-5291.
Net Assets $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class I/JABSX)
$12 0.11%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.11%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2065 Lifetime Portfolio (Class I/JABSX) returned 20.32% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class I/JABSX) 20.32% 8.37% 12.88%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 or by calling 800-225-5291.
Net Assets $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class A/JAAWX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2065 Lifetime Portfolio (Class A/JAAWX) returned 20.04% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class A/JAAWX) 14.07% 6.96% 11.57%
Multimanager 2065 Lifetime Portfolio (Class A/JAAWX)—excluding sales charge 20.04% 8.06% 12.55%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 or by calling 800-225-5291.
Net Assets $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2065 Lifetime Portfolio
(Class 1/JAAVX)
$6 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 20.46% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year 5 Years Since inception
Multimanager 2065 Lifetime Portfolio (Class 1/JAAVX) 20.46% 8.45% 12.95%
S&P 500 Index 20.38% 12.79% 16.88%
S&P Target Date 2060+ Index 20.42% 9.93% 13.65%
John Hancock 2065 Lifetime Index 22.43% 9.89% 13.83%
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 $ 169,983,197
Holdings Count | Holding 82
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $169,983,197
Total number of portfolio holdings 82
Total advisory fees paid (net) $0
Portfolio turnover rate 19%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.3%
Equity 89.0%
U.S. large cap 29.4%
International equity 27.1%
Large blend 16.3%
U.S. mid cap 8.9%
Emerging-market equity 5.8%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.5%
Absolute return 0.5%
Unaffiliated investment companies 6.3%
Equity 6.3%
U.S. Government 0.4%
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.
C000259699 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager 2070 Lifetime Portfolio
Class Name Class 1
Trading Symbol JHOPX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager 2070 Lifetime Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-344-1029.
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
of a $10,000 investment
Multimanager 2070 Lifetime Portfolio
(Class 1/JHOPX)
$6 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 2070 Lifetime Portfolio (Class 1/JHOPX) returned 20.68% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year Since inception
Multimanager 2070 Lifetime Portfolio (Class 1/JHOPX) 20.68% 27.16%
S&P 500 Index 20.38% 29.87%
S&P Target Date 2065+ Index 20.62% 27.57%
John Hancock 2070 Lifetime Index 22.43% 29.86%
Performance Inception Date Apr. 25, 2025
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 $ 12,753,053
Holdings Count | Holding 29
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $12,753,053
Total number of portfolio holdings 29
Total advisory fees paid (net) $0
Portfolio turnover rate 25%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.1%
U.S. large cap 29.4%
International equity 27.2%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.3%
Absolute return 0.3%
Unaffiliated investment companies 6.4%
Equity 6.4%
U.S. Government 0.4%
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.
C000259695 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager 2070 Lifetime Portfolio
Class Name Class A
Trading Symbol JHOQX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager 2070 Lifetime Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2070 Lifetime Portfolio
(Class A/JHOQX)
$45 0.41%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.41%
Factors Affecting Performance [Text Block]
Management’s Discussion of Fund Performance

SUMMARY OF RESULTS
Multimanager 2070 Lifetime Portfolio (Class A/JHOQX) returned 20.24% (excluding sales charges) for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year Since inception
Multimanager 2070 Lifetime Portfolio (Class A/JHOQX) 14.26% 21.91%
Multimanager 2070 Lifetime Portfolio (Class A/JHOQX)—excluding sales charge 20.24% 26.65%
S&P 500 Index 20.38% 29.87%
S&P Target Date 2065+ Index 20.62% 27.57%
John Hancock 2070 Lifetime Index 22.43% 29.86%
Performance Inception Date Apr. 25, 2025
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 or by calling 800-225-5291.
Net Assets $ 12,753,053
Holdings Count | Holding 29
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $12,753,053
Total number of portfolio holdings 29
Total advisory fees paid (net) $0
Portfolio turnover rate 25%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.1%
U.S. large cap 29.4%
International equity 27.2%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.3%
Absolute return 0.3%
Unaffiliated investment companies 6.4%
Equity 6.4%
U.S. Government 0.4%
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.
C000259698 [Member]  
Shareholder Report [Line Items]  
Fund Name Multimanager 2070 Lifetime Portfolio
Class Name Class R6
Trading Symbol JHBZX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the John Hancock Multimanager 2070 Lifetime Portfolio (the fund) for the period of September 1, 2025 to August 31, 2026.
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. You can also request this information by contacting us at 800-225-5291.
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
of a $10,000 investment
Multimanager 2070 Lifetime Portfolio
(Class R6/JHBZX)
$1 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 2070 Lifetime Portfolio (Class R6/JHBZX) returned 20.72% for the year ended August 31, 2026. Global equities produced sizable gains in the 12-month period that ended on August 31, 2026. Investors were encouraged by the favorable combination of healthy economic growth trends, robust corporate earnings, and generally supportive central bank policies, together with optimism about artificial intelligence. While technology stocks performed very well, the value style outpaced growth on a global basis and contributed meaningfully to the markets’ strong showing. Emerging market equities also posted outsized returns. Bonds registered more modest gains, led by credit-oriented investments. Income was the primary contributor to total returns for fixed income instruments, as prices came under pressure from concerns about persistent inflation, global conflicts, energy prices, and mounting government debt across the developed world.
TOP PERFORMANCE CONTRIBUTORS
Equity allocation | U.S. equities made a significant contribution to absolute performance, led by large cap equities. International developed market equities further helped results, as did emerging market stocks. Defensive equities also generated positive returns.
Bond funds | The fixed-income allocation contributed positively, led by short-term bonds and emerging market debt.
TOP PERFORMANCE DETRACTORS
Specific positions | At a time of positive returns for most segments of the financial markets, the majority of the fund’s holdings recorded a gain. However, a small position in U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) was adversely affected by rising yields.
The views expressed in this report are those of the portfolio management team 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
Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURN 1 Year Since inception
Multimanager 2070 Lifetime Portfolio (Class R6/JHBZX) 20.72% 27.19%
S&P 500 Index 20.38% 29.87%
S&P Target Date 2065+ Index 20.62% 27.57%
John Hancock 2070 Lifetime Index 22.43% 29.86%
Performance Inception Date Apr. 25, 2025
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 or by calling 800-225-5291.
Net Assets $ 12,753,053
Holdings Count | Holding 29
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
Fund Statistics
Fund net assets $12,753,053
Total number of portfolio holdings 29
Total advisory fees paid (net) $0
Portfolio turnover rate 25%
Holdings [Text Block]
Graphical Representation of Holdings
The table below shows the investment makeup of the fund, representing a percentage of the total net assets of the fund.
Asset Allocation
Affiliated investment companies 93.2%
Equity 89.1%
U.S. large cap 29.4%
International equity 27.2%
Large blend 16.2%
U.S. mid cap 8.9%
Emerging-market equity 5.9%
U.S. small cap 1.5%
Fixed income 3.8%
Short-term bond 2.4%
Emerging-market debt 0.6%
Intermediate bond 0.5%
High yield bond 0.3%
Alternative and specialty 0.3%
Absolute return 0.3%
Unaffiliated investment companies 6.4%
Equity 6.4%
U.S. Government 0.4%
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.