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(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek current income, long-term growth of capital and income and preservation of capital.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 24 to 26 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 58% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 58.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 25% of assets in equity securities and at least 25% of assets in senior debt securities. The fund allocates its investments among a diversified mix of debt and equity securities, including securities of other investment companies that invest in debt and equity securities.
For the equity portfolio, the manager looks for companies that appear to be undervalued compared to their historical valuations relative to the market. The manager uses fundamental financial analysis and proprietary financial models to identify companies of any size that are selling at a discount as measured by ratios such as price-to-book, price-to-earnings, and price-to-sales.
The manager then looks for a positive catalyst in a company's near-term outlook that it believes will accelerate earnings or improve value of the company's assets. These positive catalysts may include, but are not limited to, new, improved, or unique products or services; new or rapidly expanding markets for the company's products; new management; changes in the economic, financial, political, or regulatory environment affecting the company; or a business strategy not recognized by the marketplace. The manager also considers an issuer's dividend-paying prospects and overall financial strength.
The fund's debt portfolio is intended to enhance current income and provide added stability. The fund may invest in bonds of any maturity. The fund's bond investments are primarily rated investment-grade (rated BBB or above by Standard & Poor's Ratings Services or Baa or above by Moody's Investors Service, Inc. and unrated equivalents). Up to 20% of assets may be invested in below-investment-grade bonds (i.e., junk bonds) rated as low as C by Standard & Poor's Ratings Services or Moody's Investors Service, Inc. and their unrated equivalents. The fund's investment policies are based on credit ratings at the time of purchase.
Although the fund invests primarily in U.S. securities, it may invest up to 35% of assets in foreign securities. The fund may invest up to 50% of assets in mortgage-backed securities. The fund may trade securities actively.
The fund may engage in derivatives transactions to a limited extent. Derivatives may be used to reduce risk and/or obtain efficient market exposure, and may include futures contracts, options, and foreign currency forward contracts.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, and options. Foreign currency forward contracts, futures contracts, and options generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Investment company securities risk. A fund bears underlying fund fees and expenses indirectly.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Mortgage-backed and asset-backed securities risk. Mortgage-backed and asset-backed securities are subject to different combinations of prepayment, extension, interest-rate, and other market risks.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. The Bloomberg Barclays U.S. Aggregate Bond Index and the 60% S&P 500 Index/40% Bloomberg Barclays U.S. Aggregate Bond Index represent broad measures of the U.S. stock and bond markets, respectively, and show how the fund's performance compares against the returns of similar investments. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A, Class B and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R suite) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A, Class R6, and Class R2 shares commenced operations on October 5, 1992, September 1, 2011, and March 1, 2012, respectively. Returns prior to a class's commencement date are those of Class A shares, except that they do not include sales charges and would be lower if they did. Returns for Class R2 and Class R6 shares would have been substantially similar to returns of Class A shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '12, 11.60%
Worst quarter: Q3 '11, -11.61%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A, Class B and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R suite) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.38%)
5 Years rr_AverageAnnualReturnYear05 8.49%
10 Years rr_AverageAnnualReturnYear10 13.12%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.01%
5 Years rr_AverageAnnualReturnYear05 2.52%
10 Years rr_AverageAnnualReturnYear10 3.48%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | 60% S&P 500 Index/40% Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (2.35%)
5 Years rr_AverageAnnualReturnYear05 6.24%
10 Years rr_AverageAnnualReturnYear10 9.42%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.17%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.07%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 603
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 822
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,060
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,740
Annual Return 2009 rr_AnnualReturn2009 24.30%
Annual Return 2010 rr_AnnualReturn2010 11.15%
Annual Return 2011 rr_AnnualReturn2011 (3.23%)
Annual Return 2012 rr_AnnualReturn2012 15.35%
Annual Return 2013 rr_AnnualReturn2013 19.39%
Annual Return 2014 rr_AnnualReturn2014 8.24%
Annual Return 2015 rr_AnnualReturn2015 (1.90%)
Annual Return 2016 rr_AnnualReturn2016 8.08%
Annual Return 2017 rr_AnnualReturn2017 13.92%
Annual Return 2018 rr_AnnualReturn2018 (4.95%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '12, 11.60%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.60%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q3 '11, –11.61%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.61%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
1 Year rr_AverageAnnualReturnYear01 (9.71%)
5 Years rr_AverageAnnualReturnYear05 3.38%
10 Years rr_AverageAnnualReturnYear10 8.08%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (11.35%)
5 Years rr_AverageAnnualReturnYear05 2.15%
10 Years rr_AverageAnnualReturnYear10 7.06%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.63%)
5 Years rr_AverageAnnualReturnYear05 2.46%
10 Years rr_AverageAnnualReturnYear10 6.40%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class B  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 5.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.17%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.77%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.76%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 679
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 856
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,158
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,899
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 179
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 556
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 958
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,899
1 Year rr_AverageAnnualReturnYear01 (10.03%)
5 Years rr_AverageAnnualReturnYear05 3.36%
10 Years rr_AverageAnnualReturnYear10 8.02%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.17%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.77%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.76%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 279
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 556
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 958
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,083
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 179
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 556
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 958
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,083
1 Year rr_AverageAnnualReturnYear01 (6.51%)
5 Years rr_AverageAnnualReturnYear05 3.70%
10 Years rr_AverageAnnualReturnYear10 7.87%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.18%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 0.78%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.77%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 79
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 248
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 432
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 965
1 Year rr_AverageAnnualReturnYear01 (4.65%)
5 Years rr_AverageAnnualReturnYear05 4.76%
10 Years rr_AverageAnnualReturnYear10 9.01%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class R1  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25% [3]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.33%
Total annual fund operating expenses rr_ExpensesOverAssets 1.43%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.42%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 145
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 451
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 781
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,712
1 Year rr_AverageAnnualReturnYear01 (5.21%)
5 Years rr_AverageAnnualReturnYear05 4.09%
10 Years rr_AverageAnnualReturnYear10 8.28%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.33%
Total annual fund operating expenses rr_ExpensesOverAssets 1.18%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 119
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 374
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 648
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,431
1 Year rr_AverageAnnualReturnYear01 (5.05%)
5 Years rr_AverageAnnualReturnYear05 4.36%
10 Years rr_AverageAnnualReturnYear10 8.62%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class R3  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Service plan fee rr_Component1OtherExpensesOverAssets 0.15% [3]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 1.33%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.32%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 134
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 420
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 728
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,601
1 Year rr_AverageAnnualReturnYear01 (5.16%)
5 Years rr_AverageAnnualReturnYear05 4.20%
10 Years rr_AverageAnnualReturnYear10 8.38%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 1.03%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [2],[4]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 317
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 558
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,249
1 Year rr_AverageAnnualReturnYear01 (4.83%)
5 Years rr_AverageAnnualReturnYear05 4.60%
10 Years rr_AverageAnnualReturnYear10 8.77%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class R5  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets 0.05%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 0.73%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.72%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 74
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 232
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 405
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 906
1 Year rr_AverageAnnualReturnYear01 (4.64%)
5 Years rr_AverageAnnualReturnYear05 4.81%
10 Years rr_AverageAnnualReturnYear10 9.03%
(John Hancock Balanced Fund - Classes A, B, C, I, R1 - R6) | (John Hancock Balanced Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.60%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.08%
Total annual fund operating expenses rr_ExpensesOverAssets 0.68%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.67%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 68
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 217
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 378
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 846
1 Year rr_AverageAnnualReturnYear01 (4.56%)
5 Years rr_AverageAnnualReturnYear05 4.88%
10 Years rr_AverageAnnualReturnYear10 8.97%
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 22 to 24 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 95% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 95.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund pursues its investment objective by investing, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a portfolio of equity and equity-related securities issued by non-U.S. companies of any capitalization size. The fund may invest in all types of equity and equity-related securities, including, without limitation, exchange-traded and over-the-counter common and preferred stocks, warrants, options, rights, convertible securities, sponsored and unsponsored depositary receipts and shares, trust certificates, participatory notes, limited partnership interests, shares of other investment companies (including exchange-traded funds (ETFs)), real estate investment trusts (REITs), and equity participations. Equity participations are loans that give the lender a portion of equity ownership in a property, in addition to principal and interest payments. A convertible security is a bond, debenture, note, preferred stock, or other security that may be converted into or exchanged for a prescribed amount of common stock of the same or a different issuer within a particular period of time at a specified price or formula.
The fund defines non-U.S. companies as companies: (i) that are organized under the laws of a foreign country; (ii) whose principal trading market is in a foreign country; or (iii) that have a majority of their assets, or that derive a significant portion of their revenue or profits, from businesses, investments, or sales outside of the United States. The fund's non-U.S. investments, which may be denominated in U.S. or foreign currencies, primarily focus on developed markets, but may include emerging- and frontier-market investments.
The fund generally invests in the equity securities of issuers the manager believes are undervalued. The manager applies a bottom-up stock selection process using a combination of fundamental and quantitative analysis of issuer-specific factors such as price-to-book value, price-to-sales and earnings ratios, dividend yields, strength of management, and cash flow.
The fund may invest in derivatives. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include put and call options, futures, forward contracts, and swaps. The fund may invest up to 15% of its net assets in illiquid securities and may participate as a purchaser in Initial Public Offerings (IPOs). The fund may also seek to increase its income by lending portfolio securities.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Frontier-market risk. Frontier-market countries generally have smaller economies and less-developed capital markets and political systems than traditional emerging-market countries, which magnifies emerging-market risks.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
Initial public offerings risk. IPO share prices are frequently volatile and may significantly impact fund performance.
Investment company securities risk. A fund bears underlying fund fees and expenses indirectly.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Participatory notes risk. Due to transaction costs and other expenses, participatory notes (p-notes) will not replicate exactly the performance of their underlying securities. P-notes are general unsecured contractual obligations that are subject to liquidity risk and a high degree of counterparty risk.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Value investment risk. Value stocks may underperform the market as a whole, which may cause value-oriented funds to underperform equity funds with other investment strategies. Securities the manager believes are undervalued may never perform as expected.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I, Class R2, Class R4, and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
The fund is the successor to Robeco Boston Partners International Equity Fund, a series of The RBB Fund, Inc. (the predecessor fund), which commenced operations on December 30, 2011. Class A, Class C, Class I, Class R2, Class R4, and Class R6 shares of the fund commenced operations on September 29, 2014. For periods prior to September 29, 2014, performance shown is the actual performance of the sole share class of the predecessor fund and has not been adjusted to reflect the fees and expenses, including any Rule 12b-1 fees and/or sales charges, of any class of shares of the fund. As a result, the performance shown below may be higher than if adjusted to reflect the fees and expenses, including any Rule 12b-1 fees and/or sales charges, of the particular class of shares of the fund.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '13, 11.58%
Worst quarter: Q4 '18, -15.13%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I, Class R2, Class R4, and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (13.79%)
5 Years rr_AverageAnnualReturnYear05 0.53%
Since Inception rr_AverageAnnualReturnSinceInception 5.95%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.81%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.20%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 1.31%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [5]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.29%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 625
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 893
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,180
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,998
Annual Return 2012 rr_AnnualReturn2012 16.89%
Annual Return 2013 rr_AnnualReturn2013 29.84%
Annual Return 2014 rr_AnnualReturn2014 (5.17%)
Annual Return 2015 rr_AnnualReturn2015 1.50%
Annual Return 2016 rr_AnnualReturn2016 (0.60%)
Annual Return 2017 rr_AnnualReturn2017 24.88%
Annual Return 2018 rr_AnnualReturn2018 (18.88%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '13, 11.58%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.58%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2013
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –15.13%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.13%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (22.93%)
5 Years rr_AverageAnnualReturnYear05 (1.64%)
Since Inception rr_AverageAnnualReturnSinceInception 4.89%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (23.56%)
5 Years rr_AverageAnnualReturnYear05 (2.23%)
Since Inception rr_AverageAnnualReturnSinceInception 3.93%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (12.94%)
5 Years rr_AverageAnnualReturnYear05 (1.15%)
Since Inception rr_AverageAnnualReturnSinceInception 3.85%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.81%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.20%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 2.01%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [5]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.99%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 302
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 629
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,081
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,336
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 202
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 629
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,081
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,336
1 Year rr_AverageAnnualReturnYear01 (20.17%)
5 Years rr_AverageAnnualReturnYear05 (1.20%)
Since Inception rr_AverageAnnualReturnSinceInception 5.23%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.81%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.21%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.21%
Total annual fund operating expenses rr_ExpensesOverAssets 1.02%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [5]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.98%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 100
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 321
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 559
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,244
1 Year rr_AverageAnnualReturnYear01 (18.57%)
5 Years rr_AverageAnnualReturnYear05 (0.35%)
Since Inception rr_AverageAnnualReturnSinceInception 5.87%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.81%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.35%
Total annual fund operating expenses rr_ExpensesOverAssets 1.41%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [5]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.39%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 142
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 444
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 769
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,689
1 Year rr_AverageAnnualReturnYear01 (19.06%)
5 Years rr_AverageAnnualReturnYear05 (0.68%)
Since Inception rr_AverageAnnualReturnSinceInception 5.62%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.81%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10% [6]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 1.26%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.12%) [5],[7]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.14%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 116
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 388
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 680
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,512
1 Year rr_AverageAnnualReturnYear01 (18.78%)
5 Years rr_AverageAnnualReturnYear05 (0.45%)
Since Inception rr_AverageAnnualReturnSinceInception 5.79%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.81%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10% [8]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 0.91%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.03%) [5]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 90
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 287
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 501
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,117
1 Year rr_AverageAnnualReturnYear01 (18.55%)
5 Years rr_AverageAnnualReturnYear05 (0.27%)
Since Inception rr_AverageAnnualReturnSinceInception 5.93%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Class R5) | (John Hancock Disciplined Value International Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R5 shares.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 95% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 95.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund pursues its investment objective by investing, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a portfolio of equity and equity-related securities issued by non-U.S. companies of any capitalization size. The fund may invest in all types of equity and equity-related securities, including, without limitation, exchange-traded and over-the-counter common and preferred stocks, warrants, options, rights, convertible securities, sponsored and unsponsored depositary receipts and shares, trust certificates, participatory notes, limited partnership interests, shares of other investment companies (including exchange-traded funds (ETFs)), real estate investment trusts (REITs), and equity participations. Equity participations are loans that give the lender a portion of equity ownership in a property, in addition to principal and interest payments. A convertible security is a bond, debenture, note, preferred stock, or other security that may be converted into or exchanged for a prescribed amount of common stock of the same or a different issuer within a particular period of time at a specified price or formula.
The fund defines non-U.S. companies as companies: (i) that are organized under the laws of a foreign country; (ii) whose principal trading market is in a foreign country; or (iii) that have a majority of their assets, or that derive a significant portion of their revenue or profits, from businesses, investments, or sales outside of the United States. The fund's non-U.S. investments, which may be denominated in U.S. or foreign currencies, primarily focus on developed markets, but may include emerging- and frontier-market investments.
The fund generally invests in the equity securities of issuers the manager believes are undervalued. The manager applies a bottom-up stock selection process using a combination of fundamental and quantitative analysis of issuer-specific factors such as price-to-book value, price-to-sales and earnings ratios, dividend yields, strength of management, and cash flow.
The fund may invest in derivatives. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include put and call options, futures, forward contracts, and swaps. The fund may invest up to 15% of its net assets in illiquid securities and may participate as a purchaser in Initial Public Offerings (IPOs). The fund may also seek to increase its income by lending portfolio securities.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Frontier-market risk. Frontier-market countries generally have smaller economies and less-developed capital markets and political systems than traditional emerging-market countries, which magnifies emerging-market risks.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
Initial public offerings risk. IPO share prices are frequently volatile and may significantly impact fund performance.
Investment company securities risk. A fund bears underlying fund fees and expenses indirectly.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Participatory notes risk. Due to transaction costs and other expenses, participatory notes (p-notes) will not replicate exactly the performance of their underlying securities. P-notes are general unsecured contractual obligations that are subject to liquidity risk and a high degree of counterparty risk.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Value investment risk. Value stocks may underperform the market as a whole, which may cause value-oriented funds to underperform equity funds with other investment strategies. Securities the manager believes are undervalued may never perform as expected.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
The fund is the successor to Robeco Boston Partners International Equity Fund, a series of The RBB Fund, Inc. (the predecessor fund), which commenced operations on December 30, 2011. Class R6 shares commenced operations on September 29, 2014. Because Class R5 shares had not commenced operations as of the date of this prospectus, the returns shown are those of Class R6 shares. For periods prior to September 29, 2014, performance shown is the actual performance of the sole share class of the predecessor fund and has not been adjusted to reflect the estimated fees and expenses of the fund's Class R6 shares. As a result, the performance shown below may be higher than if adjusted to reflect the estimated fees and expenses of the fund's Class R6 shares.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns—Class R5 (%)</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '13, 11.58%
Worst quarter: Q4 '18, -15.04%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-972-8696
(John Hancock Disciplined Value International Fund - Class R5) | (John Hancock Disciplined Value International Fund) | MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (13.79%)
5 Years rr_AverageAnnualReturnYear05 0.53%
Since Inception rr_AverageAnnualReturnSinceInception 5.95%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Class R5) | (John Hancock Disciplined Value International Fund) | Class R5  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.81%
Service plan fee rr_Component1OtherExpensesOverAssets 0.05%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10% [9]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 0.96%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [10]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.95%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 97
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 305
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 530
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,177
Annual Return 2012 rr_AnnualReturn2012 16.89%
Annual Return 2013 rr_AnnualReturn2013 29.84%
Annual Return 2014 rr_AnnualReturn2014 (5.03%)
Annual Return 2015 rr_AnnualReturn2015 1.86%
Annual Return 2016 rr_AnnualReturn2016 (0.18%)
Annual Return 2017 rr_AnnualReturn2017 25.46%
Annual Return 2018 rr_AnnualReturn2018 (18.55%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '13, 11.58%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.58%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2013
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –15.04%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.04%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (18.55%)
5 Years rr_AverageAnnualReturnYear05 (0.27%)
Since Inception rr_AverageAnnualReturnSinceInception 5.93%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Class R5) | (John Hancock Disciplined Value International Fund) | Class R5 | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (19.41%)
5 Years rr_AverageAnnualReturnYear05 (1.04%)
Since Inception rr_AverageAnnualReturnSinceInception 4.83%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Disciplined Value International Fund - Class R5) | (John Hancock Disciplined Value International Fund) | Class R5 | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (10.35%)
5 Years rr_AverageAnnualReturnYear05 (0.21%)
Since Inception rr_AverageAnnualReturnSinceInception 4.62%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 20 to 22 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 50% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 50.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity and equity-related securities of emerging-market issuers. The manager may consider, but is not limited to, the classifications by the World Bank, the International Finance Corporation, or the United Nations and its agencies in determining whether a country is an emerging- or a developed-market country. The fund seeks to invest in securities that the manager considers to be undervalued or otherwise offer good prospects for capital growth.
The fund intends to invest in equity securities listed on bona fide securities exchanges or actively traded on over-the-counter markets. Equity and equity-related securities include common stocks, preferred stocks, convertible securities, warrants, and other similar securities. The fund may also invest in other investment companies (including closed-end funds) and other pooled investment vehicles that also invest in developing or emerging market economies.
Fundamentals-based stock selection lies at the heart of the manager's investment process, which focuses on high quality companies within a diverse range of dynamic emerging economies. The manager seeks to invest in companies with strong assets that exhibit balance sheet strength, superior management, and high levels of free cash-flow to support a sustainable dividend payout. Although, there is no sector or geographical bias, the fund may focus its investments in a particular sector or sectors of the economy. The fund may invest in companies of any market capitalization.
Due to volatile conditions in emerging markets, the fund's investment process may result in a higher-than-average portfolio turnover ratio, which could increase transaction costs.
The fund may attempt to mitigate the risk of unintended currency fluctuations through the use of exchange-listed or over-the-counter financial derivatives instruments, including currency forwards, non-deliverable forwards, currency options, and index options. The fund may also enter into forward currency contracts to facilitate the settlement of foreign securities purchases, repatriation of foreign currency balances, or exchange of one currency to another. The fund may use derivatives such as futures contracts and options on futures contracts to gain market exposure on uninvested cash, pending investment in securities, or to maintain liquidity to pay redemptions.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Emerging-market risk. The risks of investing in foreign securities are magnified in emerging markets. Emerging-market countries may experience higher inflation, interest rates, and unemployment and greater social, economic, and political uncertainties than more developed countries.
Greater China risk. Investments in the Greater China region may be subject to less developed trading markets, acute political risks such as possible negative repercussions resulting from China's relationship with Taiwan or Hong Kong, and restrictions on monetary repatriation or other adverse government actions. For example, a government may restrict investment in companies or industries considered important to national interests, or intervene in the financial markets, such as by imposing trading restrictions, or banning or curtailing short selling. A small number of companies and industries represent a relatively large portion of the Greater China market.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Financial services sector risk. Financial services companies can be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, options on futures, and currency options. Foreign currency forward contracts, futures contracts, and options generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Investment company securities risk. A fund bears underlying fund fees and expenses indirectly.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I, Class R2, Class R4, and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 11.74%
Worst quarter: Q4 '18, -10.86%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I, Class R2, Class R4, and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | MSCI Emerging Markets Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.58%)
Since Inception rr_AverageAnnualReturnSinceInception 2.31%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.95%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.19%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 1.44%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [11]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.43%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 638
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 932
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,247
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,137
Annual Return 2016 rr_AnnualReturn2016 2.53%
Annual Return 2017 rr_AnnualReturn2017 41.57%
Annual Return 2018 rr_AnnualReturn2018 (17.18%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 11.74%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.74%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –10.86%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (10.86%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (21.33%)
Since Inception rr_AverageAnnualReturnSinceInception (0.88%)
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (22.54%)
Since Inception rr_AverageAnnualReturnSinceInception (1.35%)
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (11.60%)
Since Inception rr_AverageAnnualReturnSinceInception (0.56%)
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.95%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.19%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 2.14%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [11]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.13%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 316
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 669
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,148
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,472
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 216
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 669
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,148
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,472
1 Year rr_AverageAnnualReturnYear01 (18.51%)
Since Inception rr_AverageAnnualReturnSinceInception (0.13%)
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.95%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.20%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 1.15%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [11]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.14%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 116
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 364
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 632
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,397
1 Year rr_AverageAnnualReturnYear01 (16.91%)
Since Inception rr_AverageAnnualReturnSinceInception 0.84%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.95%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25% [12]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.35%
Total annual fund operating expenses rr_ExpensesOverAssets 1.55%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [11]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.54%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 157
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 489
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 844
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,845
1 Year rr_AverageAnnualReturnYear01 (17.05%)
Since Inception rr_AverageAnnualReturnSinceInception 0.68%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.95%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10% [12]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.20%
Total annual fund operating expenses rr_ExpensesOverAssets 1.40%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [11],[13]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.29%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 131
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 432
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 755
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,670
1 Year rr_AverageAnnualReturnYear01 (17.03%)
Since Inception rr_AverageAnnualReturnSinceInception 0.77%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Emerging Markets Equity Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.95%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.10%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.10%
Total annual fund operating expenses rr_ExpensesOverAssets 1.05%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [11]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.04%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 106
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 333
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 578
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,282
1 Year rr_AverageAnnualReturnYear01 (16.88%)
Since Inception rr_AverageAnnualReturnSinceInception 0.94%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek total return from capital appreciation and income, with an emphasis on absolute returns over a full market cycle.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 22 to 24 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund pursues its objective by investing, under normal circumstances, at least 80% of its net assets (plus borrowings for investment purposes) in global securities of companies with infrastructure-related assets. For purposes of this policy, global securities include: common stock, depositary receipts, real estate securities (including real estate investment trusts (REITs)), master limited partnerships (MLPs) (up to a maximum of 25% of the fund's net assets), preferred stock, rights, warrants, exchange-traded funds (ETFs), and debt securities (up to a maximum of 20% of the fund's net assets). Also for purposes of this policy, infrastructure-related assets are long-lived physical assets that are held by companies, including financial holding companies, that engage in the ownership, management, construction, development, renovation, operation, use or financing of infrastructure assets, or that provide the services and raw materials necessary for the construction and maintenance of infrastructure assets. Infrastructure assets are the physical structures, networks and systems which provide necessary services for the function, growth and development of society, including but not limited to transportation and shipping, energy and utilities, water and sewage, communication, and social assets (e.g., hospitals, schools, prisons, stadiums, courthouses, subsidized housing).
Companies with long-lived physical assets are those that the manager believes possess an advantageous competitive position due to factors such as a long track record, resilience in the face of technological advances, rising replacement costs, and limited substitution risk. The manager believes investment in these types of companies can contribute to attractive, long-term absolute returns. The fund also seeks to mitigate losses during periods of unfavorable equity market conditions by attempting to limit volatility relative to the wider market. While not managed explicitly for yield, the securities in which the fund invests may often provide higher dividend yields than the broader equity market. The fund is not managed to track a benchmark index.
The fund may invest in debt securities, including convertible bonds, without any maturity limit and of any credit quality, including high-yield securities (i.e., junk bonds). The fund may also invest in cash, cash equivalents, and derivative instruments. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include swaps, forward contracts, options, currency derivatives (including currency forwards, futures, options, and spot transactions), and similar instruments or combinations thereof. Country and regional weights are driven by bottom-up security selection and are typically unconstrained; however, the fund will generally be diversified regionally across global equity markets, including emerging markets. The fund invests in companies across the market-capitalization spectrum.
The fund seeks to outperform global equity markets during periods of flat or negative market performance and may underperform during periods of strong market performance. The fund's investment returns may be volatile over short periods of time and returns over any period of time may not be positive. The maximum position in any individual security will typically be less than 10% of the fund's net assets. Generally, less than 10% of the fund's net assets will be invested in cash and cash equivalents, but can be as high as 20%.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Commodity risk. Commodity prices may be volatile due to fluctuating demand, supply disruption, speculation, and other factors. Certain commodity investments may have no active trading market at times.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Financial services sector risk. Financial services companies can be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Greater China risk. Investments in the Greater China region may be subject to less developed trading markets, acute political risks such as possible negative repercussions resulting from China's relationship with Taiwan or Hong Kong, and restrictions on monetary repatriation or other adverse government actions. For example, a government may restrict investment in companies or industries considered important to national interests, or intervene in the financial markets, such as by imposing trading restrictions, or banning or curtailing short selling. A small number of companies and industries represent a relatively large portion of the Greater China market.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Midstream energy infrastructure sector risk. Midstream energy infrastructure companies, such as companies that provide crude oil, refined product, and natural gas services, are subject to supply-and-demand fluctuations in the markets they serve, which may be impacted by a wide range of factors.
Natural resources industry risk. The natural resources industry can be significantly affected by international political and economic developments, energy conservation and exploration efforts, commodity prices, and taxes and other governmental regulations, among other factors.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Real estate securities risk. Securities of companies in the real estate industry carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Telecommunications sector risk. Telecommunication services companies are subject to government regulation of services and rates of return and can be significantly affected by intense competition, among other factors.
Transportation sector risk. Transportation companies can be significantly affected by economic changes, fuel, maintenance, and insurance costs, labor relations, and government regulation, among other factors.
Utilities sector risk. Utilities companies' performance may be volatile due to variable fuel, service, and financing costs, conservation efforts, government regulation, and other factors.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A and Class C shares commenced operations on December 20, 2013, and May 16, 2014, respectively. Returns shown prior to Class C shares' commencement date are those of Class A shares, except that they do not include Class A sales charges and would be lower if they did. Returns for Class C shares would have been substantially similar to returns of Class A shares because both share classes are invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '14, 7.30%
Worst quarter: Q4 '16, -6.49%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | MSCI AC World Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.42%)
5 Years rr_AverageAnnualReturnYear05 4.26%
Since Inception rr_AverageAnnualReturnSinceInception 4.75%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.80% [14]
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.28%
Total annual fund operating expenses rr_ExpensesOverAssets 1.38%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.07%) [15]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.31%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 627
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 909
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,211
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,069
Annual Return 2014 rr_AnnualReturn2014 7.74%
Annual Return 2015 rr_AnnualReturn2015 (3.68%)
Annual Return 2016 rr_AnnualReturn2016 4.27%
Annual Return 2017 rr_AnnualReturn2017 17.08%
Annual Return 2018 rr_AnnualReturn2018 (1.71%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '14, 7.30%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.30%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2014
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '16, –6.49%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.49%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 (6.62%)
5 Years rr_AverageAnnualReturnYear05 3.42%
Since Inception rr_AverageAnnualReturnSinceInception 3.73%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (7.37%)
5 Years rr_AverageAnnualReturnYear05 2.99%
Since Inception rr_AverageAnnualReturnSinceInception 3.30%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (3.22%)
5 Years rr_AverageAnnualReturnYear05 2.73%
Since Inception rr_AverageAnnualReturnSinceInception 2.97%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.80% [14]
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.28%
Total annual fund operating expenses rr_ExpensesOverAssets 2.08%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.07%) [15]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.01%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 304
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 645
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,112
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,405
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 204
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 645
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,112
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,405
1 Year rr_AverageAnnualReturnYear01 (3.34%)
5 Years rr_AverageAnnualReturnYear05 3.80%
Since Inception rr_AverageAnnualReturnSinceInception 4.11%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.80% [14]
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.30%
Total annual fund operating expenses rr_ExpensesOverAssets 1.10%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [15]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 340
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 597
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,331
1 Year rr_AverageAnnualReturnYear01 (1.40%)
5 Years rr_AverageAnnualReturnYear05 4.78%
Since Inception rr_AverageAnnualReturnSinceInception 5.09%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Infrastructure Fund - Classes A, C, I and R6) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.80% [14]
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 0.99%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.07%) [15]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 308
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 540
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,207
1 Year rr_AverageAnnualReturnYear01 (1.40%)
5 Years rr_AverageAnnualReturnYear05 4.91%
Since Inception rr_AverageAnnualReturnSinceInception 5.22%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 16 to 18 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of any market capitalization or sector that meet the manager's sustainability criteria. Equity securities include common and preferred stocks and their equivalents. The manager seeks companies meeting its sustainability criteria with high quality characteristics including strong environmental, social, and governance (ESG) records.
The manager employs a bottom-up financial analysis that includes a review of ESG issues and how they may impact stock valuation or performance. ESG factors reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, and supply chain and human rights policies. Companies that meet the manager's ESG requirements or sustainability criteria typically have strong sustainability data and policy reporting, for example publishing a comprehensive corporate sustainability report. The fund may also invest up to 20% of its total assets in the equity securities of foreign issuers, including American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). The fund may focus its investments in a particular sector or sectors of the economy. The manager may sell stocks for several reasons, including when the stock no longer meets the manager's ESG or sustainability criteria, or when the stock declines in value and no longer reflects the manager's investment thesis. The fund will not invest in any companies with material exposure to agricultural biotechnology, coal mining, hard rock mining, nuclear power, tar sands, tobacco, or weapons/firearms. The fund also will not invest in any companies with major recent or ongoing controversies involving animal welfare, environmental, governance, human rights, product safety, or workplace matters.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies, and may file shareholder proposals on behalf of the fund. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '18, 6.82%
Worst quarter: Q4 '18, -12.95%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | S&P Composite 1500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.96%)
Since Inception rr_AverageAnnualReturnSinceInception 9.06%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.84% [16]
Total annual fund operating expenses rr_ExpensesOverAssets 1.84%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [17]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 613
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 988
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,386
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,498
Annual Return 2017 rr_AnnualReturn2017 18.16%
Annual Return 2018 rr_AnnualReturn2018 (3.50%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '18, 6.82%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.82%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2018
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –12.95%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (12.95%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (8.33%)
Since Inception rr_AverageAnnualReturnSinceInception 5.57%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.27%)
Since Inception rr_AverageAnnualReturnSinceInception 4.80%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.22%)
Since Inception rr_AverageAnnualReturnSinceInception 4.26%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.84% [16]
Total annual fund operating expenses rr_ExpensesOverAssets 2.59%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [17]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 295
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 742
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,315
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,875
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 195
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 742
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,315
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,875
1 Year rr_AverageAnnualReturnYear01 (5.08%)
Since Inception rr_AverageAnnualReturnSinceInception 6.92%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.85% [16]
Total annual fund operating expenses rr_ExpensesOverAssets 1.60%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [17]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.93%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 95
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 439
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 808
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,844
1 Year rr_AverageAnnualReturnYear01 (3.20%)
Since Inception rr_AverageAnnualReturnSinceInception 7.99%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG All Cap Core Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.74% [16]
Total annual fund operating expenses rr_ExpensesOverAssets 1.49%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [17]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 84
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 405
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 750
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,722
1 Year rr_AverageAnnualReturnYear01 (3.09%)
Since Inception rr_AverageAnnualReturnSinceInception 8.12%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes R2 and R4) | (John Hancock ESG All Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of any market capitalization or sector that meet the manager's sustainability criteria. Equity securities include common and preferred stocks and their equivalents. The manager seeks companies meeting its sustainability criteria with high quality characteristics including strong environmental, social, and governance (ESG) records.
The manager employs a bottom-up financial analysis that includes a review of ESG issues and how they may impact stock valuation or performance. ESG factors reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, and supply chain and human rights policies. Companies that meet the manager's ESG requirements or sustainability criteria typically have strong sustainability data and policy reporting, for example publishing a comprehensive corporate sustainability report. The fund may also invest up to 20% of its total assets in the equity securities of foreign issuers, including American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). The fund may focus its investments in a particular sector or sectors of the economy. The manager may sell stocks for several reasons, including when the stock no longer meets the manager's ESG or sustainability criteria, or when the stock declines in value and no longer reflects the manager's investment thesis. The fund will not invest in any companies with material exposure to agricultural biotechnology, coal mining, hard rock mining, nuclear power, tar sands, tobacco, or weapons/firearms. The fund also will not invest in any companies with major recent or ongoing controversies involving animal welfare, environmental, governance, human rights, product safety, or workplace matters.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies, and may file shareholder proposals on behalf of the fund. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class C shares commenced operations on June 6, 2016. Because Class R2 and Class R4 shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class C shares, except that they do not include sales charges and would be lower if they did. Returns for Class R2 and Class R4 shares would have been substantially similar to returns of Class C shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class R2 </b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '18, 6.64%
Worst quarter: Q4 '18, -13.07%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class R2 shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-972-8696
(John Hancock ESG All Cap Core Fund - Classes R2 and R4) | (John Hancock ESG All Cap Core Fund) | S&P Composite 1500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.96%)
Since Inception rr_AverageAnnualReturnSinceInception 9.06%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes R2 and R4) | (John Hancock ESG All Cap Core Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.74% [18]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.99%
Total annual fund operating expenses rr_ExpensesOverAssets 1.99%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [19]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.32%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 134
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 560
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,011
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,263
Annual Return 2017 rr_AnnualReturn2017 17.22%
Annual Return 2018 rr_AnnualReturn2018 (4.16%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '18, 6.64%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.64%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2018
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –13.07%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (13.07%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (4.16%)
Since Inception rr_AverageAnnualReturnSinceInception 6.92%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes R2 and R4) | (John Hancock ESG All Cap Core Fund) | Class R2 | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.10%)
Since Inception rr_AverageAnnualReturnSinceInception 6.24%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes R2 and R4) | (John Hancock ESG All Cap Core Fund) | Class R2 | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.75%)
Since Inception rr_AverageAnnualReturnSinceInception 5.32%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG All Cap Core Fund - Classes R2 and R4) | (John Hancock ESG All Cap Core Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.74% [18]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.84%
Total annual fund operating expenses rr_ExpensesOverAssets 1.84%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [19]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 119
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 514
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 933
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,104
1 Year rr_AverageAnnualReturnYear01 (4.16%)
Since Inception rr_AverageAnnualReturnSinceInception 6.92%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 16 to 18 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in stocks of foreign companies having a market capitalization of $2 billion or more at the time of purchase that meet the manager's sustainability criteria. The manager seeks companies meeting its sustainability criteria with high-quality characteristics, including strong or improving environmental, social, and governance (ESG) records.
The fund primarily invests in a diversified portfolio of equity securities of foreign companies in a number of developed and emerging markets outside of the United States. The fund defines foreign companies as companies: (i) that are organized under the laws of a country outside the United States; or (ii) that have a minimum of 50% of their assets, or that derive a minimum of 50% of their revenue or profits, from businesses, investments, or sales outside of the United States.
The manager seeks to preserve and build capital over the long term through investing in a diversified portfolio of international-developed and emerging-market stocks of companies it believes are high quality and under-valued. The manager looks for companies with sound governance and a history of responsible financial management that, in its opinion, are capable of consistent profitability over a long time horizon. The manager seeks to fully integrate ESG criteria into the stock selection and portfolio construction process and expresses a preference for best-in-class firms with innovative approaches to the environmental and social challenges their industries, society, and the world face. "Best-in-class" refers to firms that the manager views as having better records on ESG criteria than other firms in the same industry or sector.
The manager seeks to identify companies with a demonstrated overall high level of accountability to all stakeholders, including providing safe, desirable, high-quality products or services and marketing them in responsible ways. ESG criteria reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, water management policies, and supply chain and human rights policies. The fund may focus its investments in a particular sector or sectors of the economy. The fund will avoid investments that in the judgment of the manager have material direct revenues from production of nuclear power, tobacco, and/or weapons/firearms.
The manager selects stocks through bottom-up, fundamental research, while maintaining a disciplined approach to valuation and risk control. The manager may sell a security when its price reaches a set target, if it believes that other investments are more attractive, when in its opinion ESG performance significantly deteriorates, or for other reasons it may determine.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 9.87%
Worst quarter: Q4 '18, -11.72%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund) | MSCI All Country World ex–USA Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.20%)
Since Inception rr_AverageAnnualReturnSinceInception 3.81%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.85%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.52% [20]
Total annual fund operating expenses rr_ExpensesOverAssets 1.62%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [21]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.27%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 623
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 953
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,306
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,298
Annual Return 2017 rr_AnnualReturn2017 30.34%
Annual Return 2018 rr_AnnualReturn2018 (13.08%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 9.87%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.87%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.72%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.72%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (17.41%)
Since Inception rr_AverageAnnualReturnSinceInception 3.79%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (17.75%)
Since Inception rr_AverageAnnualReturnSinceInception 3.50%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.81%)
Since Inception rr_AverageAnnualReturnSinceInception 3.02%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.85%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.53% [20]
Total annual fund operating expenses rr_ExpensesOverAssets 1.38%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [21]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.03%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 105
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 402
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 722
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,627
1 Year rr_AverageAnnualReturnYear01 (12.89%)
Since Inception rr_AverageAnnualReturnSinceInception 6.71%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.85%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.42% [20]
Total annual fund operating expenses rr_ExpensesOverAssets 1.27%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [21]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 368
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 663
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,503
1 Year rr_AverageAnnualReturnYear01 (12.80%)
Since Inception rr_AverageAnnualReturnSinceInception 6.82%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes R2 and R4) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in stocks of foreign companies having a market capitalization of $2 billion or more at the time of purchase that meet the manager's sustainability criteria. The manager seeks companies meeting its sustainability criteria with high-quality characteristics, including strong or improving environmental, social, and governance (ESG) records.
The fund primarily invests in a diversified portfolio of equity securities of foreign companies in a number of developed and emerging markets outside of the United States. The fund defines foreign companies as companies: (i) that are organized under the laws of a country outside the United States; or (ii) that have a minimum of 50% of their assets, or that derive a minimum of 50% of their revenue or profits, from businesses, investments, or sales outside of the United States.
The manager seeks to preserve and build capital over the long term through investing in a diversified portfolio of international-developed and emerging-market stocks of companies it believes are high quality and under-valued. The manager looks for companies with sound governance and a history of responsible financial management that, in its opinion, are capable of consistent profitability over a long time horizon. The manager seeks to fully integrate ESG criteria into the stock selection and portfolio construction process and expresses a preference for best-in-class firms with innovative approaches to the environmental and social challenges their industries, society, and the world face. "Best-in-class" refers to firms that the manager views as having better records on ESG criteria than other firms in the same industry or sector.
The manager seeks to identify companies with a demonstrated overall high level of accountability to all stakeholders, including providing safe, desirable, high-quality products or services and marketing them in responsible ways. ESG criteria reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, water management policies, and supply chain and human rights policies. The fund may focus its investments in a particular sector or sectors of the economy. The fund will avoid investments that in the judgment of the manager have material direct revenues from production of nuclear power, tobacco, and/or weapons/firearms.
The manager selects stocks through bottom-up, fundamental research, while maintaining a disciplined approach to valuation and risk control. The manager may sell a security when its price reaches a set target, if it believes that other investments are more attractive, when in its opinion ESG performance significantly deteriorates, or for other reasons it may determine.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A shares commenced operations on December 14, 2016. Because Class R2 and Class R4 shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class A shares, except that they do not include sales charges and would be lower if they did. Returns for Class R2 and Class R4 shares would have been substantially similar to returns of Class A shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class R2</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 9.87%
Worst quarter: Q4 '18, -11.72%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class R2 shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-972-8696
(John Hancock ESG International Equity Fund - Classes R2 and R4) | (John Hancock ESG International Equity Fund) | MSCI All Country World ex–USA Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.20%)
Since Inception rr_AverageAnnualReturnSinceInception 3.81%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes R2 and R4) | (John Hancock ESG International Equity Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.85%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.42% [22]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.67%
Total annual fund operating expenses rr_ExpensesOverAssets 1.77%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [23]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.42%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 145
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 523
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 927
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,055
Annual Return 2017 rr_AnnualReturn2017 30.34%
Annual Return 2018 rr_AnnualReturn2018 (13.08%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 9.87%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.87%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.72%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.72%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (13.08%)
Since Inception rr_AverageAnnualReturnSinceInception 6.44%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes R2 and R4) | (John Hancock ESG International Equity Fund) | Class R2 | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (13.43%)
Since Inception rr_AverageAnnualReturnSinceInception 6.14%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes R2 and R4) | (John Hancock ESG International Equity Fund) | Class R2 | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (7.23%)
Since Inception rr_AverageAnnualReturnSinceInception 5.06%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Classes R2 and R4) | (John Hancock ESG International Equity Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.85%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.42% [22]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.52%
Total annual fund operating expenses rr_ExpensesOverAssets 1.62%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [23]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.27%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 129
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 477
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 848
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,892
1 Year rr_AverageAnnualReturnYear01 (13.08%)
Since Inception rr_AverageAnnualReturnSinceInception 6.44%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Class C) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class C shares.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in stocks of foreign companies having a market capitalization of $2 billion or more at the time of purchase that meet the manager's sustainability criteria. The manager seeks companies meeting its sustainability criteria with high-quality characteristics, including strong or improving environmental, social, and governance (ESG) records.
The fund primarily invests in a diversified portfolio of equity securities of foreign companies in a number of developed and emerging markets outside of the United States. The fund defines foreign companies as companies: (i) that are organized under the laws of a country outside the United States; or (ii) that have a minimum of 50% of their assets, or that derive a minimum of 50% of their revenue or profits, from businesses, investments, or sales outside of the United States.
The manager seeks to preserve and build capital over the long term through investing in a diversified portfolio of international-developed and emerging-market stocks of companies it believes are high quality and under-valued. The manager looks for companies with sound governance and a history of responsible financial management that, in its opinion, are capable of consistent profitability over a long time horizon. The manager seeks to fully integrate ESG criteria into the stock selection and portfolio construction process and expresses a preference for best-in-class firms with innovative approaches to the environmental and social challenges their industries, society, and the world face. "Best-in-class" refers to firms that the manager views as having better records on ESG criteria than other firms in the same industry or sector.
The manager seeks to identify companies with a demonstrated overall high level of accountability to all stakeholders, including providing safe, desirable, high-quality products or services and marketing them in responsible ways. ESG criteria reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, water management policies, and supply chain and human rights policies. The fund may focus its investments in a particular sector or sectors of the economy. The fund will avoid investments that in the judgment of the manager have material direct revenues from production of nuclear power, tobacco, and/or weapons/firearms.
The manager selects stocks through bottom-up, fundamental research, while maintaining a disciplined approach to valuation and risk control. The manager may sell a security when its price reaches a set target, if it believes that other investments are more attractive, when in its opinion ESG performance significantly deteriorates, or for other reasons it may determine.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291, Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time.
A note on performance
Class A shares commenced operations on December 14, 2016. Because Class C shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class A shares, except that they do not include Class A sales charges and would be lower if they did. Returns for Class C shares would have been substantially similar to returns of Class A shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class C (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 9.87%
Worst quarter: Q4 '18, -11.72%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-225-5291
(John Hancock ESG International Equity Fund - Class C) | (John Hancock ESG International Equity Fund) | MSCI All Country World ex–USA Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.20%)
Since Inception rr_AverageAnnualReturnSinceInception 3.81%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Class C) | (John Hancock ESG International Equity Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.85%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.52% [24]
Total annual fund operating expenses rr_ExpensesOverAssets 2.37%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [25]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 305
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 706
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,234
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,680
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 205
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 706
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,234
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,680
Annual Return 2017 rr_AnnualReturn2017 30.34%
Annual Return 2018 rr_AnnualReturn2018 (13.08%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 9.87%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.87%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.72%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.72%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (13.93%)
Since Inception rr_AverageAnnualReturnSinceInception 6.44%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Class C) | (John Hancock ESG International Equity Fund) | Class C | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.28%)
Since Inception rr_AverageAnnualReturnSinceInception 6.14%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG International Equity Fund - Class C) | (John Hancock ESG International Equity Fund) | Class C | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (7.73%)
Since Inception rr_AverageAnnualReturnSinceInception 5.06%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 16 to 18 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 22% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of large-capitalization companies or sectors that meet the manager's sustainability criteria. The fund considers large-capitalization companies to be those companies in the capitalization range of the S&P 500 Index, which was approximately $2.31 billion to $785.03 billion as of December 31, 2018. Equity securities include common and preferred stocks and their equivalents. The manager seeks companies meeting its sustainability criteria with high quality characteristics including strong environmental, social, and governance (ESG) records.
The manager employs a bottom-up financial analysis that includes a review of ESG issues and how they may impact stock valuation or performance. ESG factors reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, and supply chain and human rights policies. Companies that meet the manager's ESG requirements or sustainability criteria typically have strong sustainability data and policy reporting, for example publishing a comprehensive corporate sustainability report. The fund may also invest up to 20% of its total assets in the equity securities of foreign issuers, including American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). The fund may focus its investments in a particular sector or sectors of the economy. The manager may sell stocks for several reasons, including when the stock no longer meets the manager's ESG or sustainability criteria, or when the stock declines in value and no longer reflects the manager's investment thesis. The fund will not invest in any companies with material exposure to agricultural biotechnology, coal mining, hard rock mining, nuclear power, tar sands, tobacco, or weapons/firearms. The fund also will not invest in any companies with major recent or ongoing controversies involving animal welfare, environmental, governance, human rights, product safety, or workplace matters.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies, and may file shareholder proposals on behalf of the fund. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Information technology risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '18, 8.13%
Worst quarter: Q4 '18, -11.22%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.38%)
Since Inception rr_AverageAnnualReturnSinceInception 9.32%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.56% [26]
Total annual fund operating expenses rr_ExpensesOverAssets 1.56%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [27]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 613
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 932
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,272
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,232
Annual Return 2017 rr_AnnualReturn2017 16.25%
Annual Return 2018 rr_AnnualReturn2018 (0.18%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '18, 8.13%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.13%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2018
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.22%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.22%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (5.21%)
Since Inception rr_AverageAnnualReturnSinceInception 6.10%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.67%)
Since Inception rr_AverageAnnualReturnSinceInception 5.72%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (2.73%)
Since Inception rr_AverageAnnualReturnSinceInception 4.69%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.56% [26]
Total annual fund operating expenses rr_ExpensesOverAssets 2.31%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [27]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 295
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 684
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,200
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,616
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 195
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 684
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,200
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,616
1 Year rr_AverageAnnualReturnYear01 (1.94%)
Since Inception rr_AverageAnnualReturnSinceInception 7.44%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.57% [26]
Total annual fund operating expenses rr_ExpensesOverAssets 1.32%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [27]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.93%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 95
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 380
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 686
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,556
1 Year rr_AverageAnnualReturnYear01 none
Since Inception rr_AverageAnnualReturnSinceInception 8.51%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes A, C, I and R6) | (John Hancock ESG Large Cap Core Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.46% [26]
Total annual fund operating expenses rr_ExpensesOverAssets 1.21%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [27]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 84
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 345
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 627
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,431
1 Year rr_AverageAnnualReturnYear01 0.10%
Since Inception rr_AverageAnnualReturnSinceInception 8.63%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes R2 and R4) | (John Hancock ESG Large Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 22% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of large-capitalization companies or sectors that meet the manager's sustainability criteria. The fund considers large-capitalization companies to be those companies in the capitalization range of the S&P 500 Index, which was approximately $2.31 billion to $785.03 billion as of December 31, 2018. Equity securities include common and preferred stocks and their equivalents. The manager seeks companies meeting its sustainability criteria with high quality characteristics including strong environmental, social, and governance (ESG) records.
The manager employs a bottom-up financial analysis that includes a review of ESG issues and how they may impact stock valuation or performance. ESG factors reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, and supply chain and human rights policies. Companies that meet the manager's ESG requirements or sustainability criteria typically have strong sustainability data and policy reporting, for example publishing a comprehensive corporate sustainability report. The fund may also invest up to 20% of its total assets in the equity securities of foreign issuers, including American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). The fund may focus its investments in a particular sector or sectors of the economy. The manager may sell stocks for several reasons, including when the stock no longer meets the manager's ESG or sustainability criteria, or when the stock declines in value and no longer reflects the manager's investment thesis. The fund will not invest in any companies with material exposure to agricultural biotechnology, coal mining, hard rock mining, nuclear power, tar sands, tobacco, or weapons/firearms. The fund also will not invest in any companies with major recent or ongoing controversies involving animal welfare, environmental, governance, human rights, product safety, or workplace matters.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies, and may file shareholder proposals on behalf of the fund. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Information technology risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class C shares commenced operations on June 6, 2016. Because Class R2 and Class R4 shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class C shares, except that they do not include sales charges and would be lower if they did. Returns for Class R2 and Class R4 shares would have been substantially similar to returns of Class C shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class R2</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '18, 7.88%
Worst quarter: Q4 '18, -11.37%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class R2 shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-972-8696
(John Hancock ESG Large Cap Core Fund - Classes R2 and R4) | (John Hancock ESG Large Cap Core Fund) | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.38%)
Since Inception rr_AverageAnnualReturnSinceInception 9.32%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes R2 and R4) | (John Hancock ESG Large Cap Core Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.46% [28]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.71%
Total annual fund operating expenses rr_ExpensesOverAssets 1.71%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [29]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.32%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 134
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 501
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 892
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,987
Annual Return 2017 rr_AnnualReturn2017 15.39%
Annual Return 2018 rr_AnnualReturn2018 (0.97%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '18, 7.88%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.88%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2018
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.37%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.37%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (0.97%)
Since Inception rr_AverageAnnualReturnSinceInception 7.44%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes R2 and R4) | (John Hancock ESG Large Cap Core Fund) | Class R2 | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.37%)
Since Inception rr_AverageAnnualReturnSinceInception 7.16%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes R2 and R4) | (John Hancock ESG Large Cap Core Fund) | Class R2 | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.27%)
Since Inception rr_AverageAnnualReturnSinceInception 5.74%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock ESG Large Cap Core Fund - Classes R2 and R4) | (John Hancock ESG Large Cap Core Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.46% [28]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.56%
Total annual fund operating expenses rr_ExpensesOverAssets 1.56%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [29]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 119
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 454
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 813
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,823
1 Year rr_AverageAnnualReturnYear01 (0.97%)
Since Inception rr_AverageAnnualReturnSinceInception 7.44%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 23 to 25 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 47.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of large-capitalization companies. The fund considers large-capitalization companies to be those in the capitalization range of the S&P 500 Index, which was approximately $3 billion to $780 billion as of December 31, 2018. Equity securities include common and preferred stocks and their equivalents.
The manager looks to invest in companies that are undervalued and/or offer the potential for above-average earnings growth, using a combination of proprietary financial models and bottom-up, fundamental financial research to identify companies with substantial cash flows, reliable revenue streams, superior competitive positions, and strong management.
The fund manages risk by typically holding between 45 and 65 large companies in a broad range of industries. The fund may focus its investments in a particular sector or sectors of the economy. The fund may attempt to take advantage of short-term market volatility by investing in corporate restructurings or pending acquisitions. The fund may invest up to 35% of its assets in foreign securities and may trade securities actively.
The fund may invest up to 20% of its assets in bonds of any maturity, including up to 15% of net assets in below-investment-grade bonds (i.e., junk bonds) rated as low as CC by Standard & Poor's Ratings Services or Ca by Moody's Investors Service, Inc. and their unrated equivalents. The manager looks for bonds with the most favorable risk/return ratios. The fund's investment policies are based on credit ratings at the time of purchase.
The fund may invest in derivatives to a limited extent. Derivatives may be used to reduce risk and/or obtain efficient market exposure, and may include futures contracts, options, and foreign currency forward contracts.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, and options. Foreign currency forward contracts, futures contracts, and options generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Merger and restructuring risk. A merger or other restructuring, tender offer, or exchange offer proposed or pending at the time of investment in risk arbitrage securities may not be completed on the terms contemplated, resulting in losses.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A, Class B, and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R suite) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A, Class R6, and Class R2 shares commenced operations on September 30, 1984, September 1, 2011, and March 1, 2012, respectively; Class R1, Class R3, Class R4, and Class R5 shares commenced operations on May 22, 2009. Returns prior to a class's commencement date are those of Class A shares, except that they do not include sales charges and would be lower if they did. Returns for Class R1, Class R2, Class R3, Class R4, Class R5, and Class R6 shares would have been substantially similar to returns of Class A shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '09, 16.17%
Worst quarter: Q3 '11, -18.93%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A, Class B, and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R suite) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.38%)
5 Years rr_AverageAnnualReturnYear05 8.49%
10 Years rr_AverageAnnualReturnYear10 13.12%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.17%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.03%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 599
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 810
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,039
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,696
Annual Return 2009 rr_AnnualReturn2009 33.73%
Annual Return 2010 rr_AnnualReturn2010 14.20%
Annual Return 2011 rr_AnnualReturn2011 (9.03%)
Annual Return 2012 rr_AnnualReturn2012 20.18%
Annual Return 2013 rr_AnnualReturn2013 32.23%
Annual Return 2014 rr_AnnualReturn2014 7.84%
Annual Return 2015 rr_AnnualReturn2015 5.79%
Annual Return 2016 rr_AnnualReturn2016 10.07%
Annual Return 2017 rr_AnnualReturn2017 20.19%
Annual Return 2018 rr_AnnualReturn2018 (13.88%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '09, 16.17%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.17%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q3 '11, –18.93%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.93%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
1 Year rr_AverageAnnualReturnYear01 (18.19%)
5 Years rr_AverageAnnualReturnYear05 4.31%
10 Years rr_AverageAnnualReturnYear10 10.55%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (20.51%)
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 9.81%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.00%)
5 Years rr_AverageAnnualReturnYear05 3.37%
10 Years rr_AverageAnnualReturnYear10 8.76%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class B  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 5.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.17%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.78%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.77%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 680
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 859
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,164
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,896
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 180
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 559
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 964
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,896
1 Year rr_AverageAnnualReturnYear01 (18.23%)
5 Years rr_AverageAnnualReturnYear05 4.28%
10 Years rr_AverageAnnualReturnYear10 10.45%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.17%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.78%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.77%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 280
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 559
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 964
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,094
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 180
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 559
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 964
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,094
1 Year rr_AverageAnnualReturnYear01 (15.27%)
5 Years rr_AverageAnnualReturnYear05 4.60%
10 Years rr_AverageAnnualReturnYear10 10.29%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.18%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 0.79%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.78%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 80
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 251
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 438
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 977
1 Year rr_AverageAnnualReturnYear01 (13.67%)
5 Years rr_AverageAnnualReturnYear05 5.66%
10 Years rr_AverageAnnualReturnYear10 11.46%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class R1  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25% [31]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.07%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.32%
Total annual fund operating expenses rr_ExpensesOverAssets 1.43%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.42%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 145
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 451
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 781
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,712
1 Year rr_AverageAnnualReturnYear01 (14.20%)
5 Years rr_AverageAnnualReturnYear05 4.98%
10 Years rr_AverageAnnualReturnYear10 10.73%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25% [31]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.07%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.32%
Total annual fund operating expenses rr_ExpensesOverAssets 1.18%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 119
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 374
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 648
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,431
1 Year rr_AverageAnnualReturnYear01 (14.00%)
5 Years rr_AverageAnnualReturnYear05 5.24%
10 Years rr_AverageAnnualReturnYear10 11.06%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class R3  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Service plan fee rr_Component1OtherExpensesOverAssets 0.15% [31]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.07%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 1.33%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.32%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 134
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 420
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 728
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,601
1 Year rr_AverageAnnualReturnYear01 (14.10%)
5 Years rr_AverageAnnualReturnYear05 5.09%
10 Years rr_AverageAnnualReturnYear10 10.83%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.07%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 1.03%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [30],[32]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 317
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 558
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,249
1 Year rr_AverageAnnualReturnYear01 (13.78%)
5 Years rr_AverageAnnualReturnYear05 5.50%
10 Years rr_AverageAnnualReturnYear10 11.20%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class R5  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets 0.05%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.07%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.12%
Total annual fund operating expenses rr_ExpensesOverAssets 0.73%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.72%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 74
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 232
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 405
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 906
1 Year rr_AverageAnnualReturnYear01 (13.61%)
5 Years rr_AverageAnnualReturnYear05 5.71%
10 Years rr_AverageAnnualReturnYear10 11.46%
(John Hancock Fundamental Large Cap Core - Classes A, B, C, I, R1 - R6) | (John Hancock Fundamental Large Cap Core Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.07%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.07%
Total annual fund operating expenses rr_ExpensesOverAssets 0.68%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [30]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.67%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 68
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 217
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 378
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 846
1 Year rr_AverageAnnualReturnYear01 (13.56%)
5 Years rr_AverageAnnualReturnYear05 5.78%
10 Years rr_AverageAnnualReturnYear10 11.43%
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term total return.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 19 to 21 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The "Total annual fund operating expenses after expense reimbursements" shown may not correlate to the fund's ratios of expenses to average daily net assets shown in the "Financial highlights" section of the fund's prospectus, which does not include "Acquired fund fees and expenses."
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 141% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 141.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund has a broad investment mandate that permits it to use an extensive range of investment strategies and to invest in a wide spectrum of equity and fixed-income securities, as well as derivative instruments, in pursuing its investment objective.
The fund invests in equity securities of U.S. and foreign companies of various market capitalizations, including preferred and convertible securities. The fund also invests in fixed-income securities, which are not subject to any credit rating or maturity limitations, issued by companies and government and supranational entities around the world, including higher-yielding below-investment-grade securities (i.e., junk bonds). The fund may invest in emerging as well as developed markets and may invest a significant portion of its assets in the securities of companies in particular economic sectors. Under normal market conditions, at least 40% of the value of the fund's net assets will be invested in or exposed to obligations of issuers or obligors located outside of the United States.
The fund also may invest extensively in derivative instruments, which are generally financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate, or index, and may relate to equity securities, fixed-income securities, interest rates, total return rates, currencies or currency exchange rates, and related indexes. The fund may invest in futures, options, foreign currency forward contracts, and swaps (including, but not limited to, credit default swaps, inflation swaps, interest rate swaps, variance swaps and total return swaps). The fund can take long and short positions in markets, securities and groups of securities through derivative instruments. The fund may at times emphasize total return swaps, based on individual securities or a basket of securities, including both equity and fixed-income securities.
The manager employs a "global multi-asset strategy" through a fusion of macroeconomic and microeconomic capabilities, and seeks to achieve long-term total return by delivering a diversified global portfolio that makes use of multiple strategies across various asset classes. It aims to exploit market cyclicality and a diverse array of inefficiencies across and within global markets to maximize risk-adjusted absolute return by investing in listed equity, equity-related and debt securities, and derivatives or other instruments, both for investment and hedging purposes. "Equity related" securities may include depositary receipts, as well as common, preferred and convertible preferred stocks and securities the values of which are tied to the price of stocks, such as rights, warrants and convertible debt securities, and securities convertible into or exchangeable for stocks.
The manager manages the fund's investment strategies dynamically over time, and will actively modify investment strategies and develop new strategies in response to additional research, changing market conditions, or other factors. As a result, the fund may experience high portfolio turnover. The fund's strategies seek to deliver returns commensurate with reasonable levels of risk and tangible diversification benefits, while having both sufficient liquidity and capacity to benefit the fund in a significant way.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. In addition, although the manager aims to maximize absolute return, there is no guarantee that the fund will generate positive returns. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk depending upon the nature of their support. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: credit default swaps; foreign currency forward contracts; futures contracts; interest rate swaps; options; swaps; variance swaps; and total return swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '17, 1.34%
Worst quarter: Q1 '18, -3.48%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | ICE Bank of America Merrill Lynch U.S. Dollar 6-Month LIBOR Constant Maturity Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.00%
Since Inception rr_AverageAnnualReturnSinceInception 1.41%
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 1.55%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.71% [33]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [34]
Total annual fund operating expenses rr_ExpensesOverAssets 2.52%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [35]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.99% [36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 692
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,197
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,728
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 3,175
Annual Return 2017 rr_AnnualReturn2017 2.69%
Annual Return 2018 rr_AnnualReturn2018 (5.47%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '17, 1.34%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.34%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q1 '18, –3.48%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.48%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (10.16%)
Since Inception rr_AverageAnnualReturnSinceInception (4.17%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (10.46%)
Since Inception rr_AverageAnnualReturnSinceInception (4.42%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.94%)
Since Inception rr_AverageAnnualReturnSinceInception (3.19%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 1.55%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.71% [33]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [34]
Total annual fund operating expenses rr_ExpensesOverAssets 3.27%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [35]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.74% [36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 377
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 957
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,662
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,531
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 277
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 957
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,662
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,531
1 Year rr_AverageAnnualReturnYear01 (6.98%)
Since Inception rr_AverageAnnualReturnSinceInception (3.00%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 1.55%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.72% [33]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [34]
Total annual fund operating expenses rr_ExpensesOverAssets 2.28%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [35]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.75% [36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 178
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 662
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,172
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,574
1 Year rr_AverageAnnualReturnYear01 (5.10%)
Since Inception rr_AverageAnnualReturnSinceInception (2.05%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes A, C, I and R6) | (John Hancock Global Focused Strategies Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 1.55%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.61% [33]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [34]
Total annual fund operating expenses rr_ExpensesOverAssets 2.17%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [35]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.64% [36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 167
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 628
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,116
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,462
1 Year rr_AverageAnnualReturnYear01 (4.91%)
Since Inception rr_AverageAnnualReturnSinceInception (1.91%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes R2 and R4) | (John Hancock Global Focused Strategies Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term total return.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The "Total annual fund operating expenses after expense reimbursements" shown may not correlate to the fund's ratios of expenses to average daily net assets shown in the "Financial highlights" section of the fund's prospectus, which does not include "Acquired fund fees and expenses."
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 141% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 141.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund has a broad investment mandate that permits it to use an extensive range of investment strategies and to invest in a wide spectrum of equity and fixed-income securities, as well as derivative instruments, in pursuing its investment objective.
The fund invests in equity securities of U.S. and foreign companies of various market capitalizations, including preferred and convertible securities. The fund also invests in fixed-income securities, which are not subject to any credit rating or maturity limitations, issued by companies and government and supranational entities around the world, including higher-yielding below-investment-grade securities (i.e., junk bonds). The fund may invest in emerging as well as developed markets and may invest a significant portion of its assets in the securities of companies in particular economic sectors. Under normal market conditions, at least 40% of the value of the fund's net assets will be invested in or exposed to obligations of issuers or obligors located outside of the United States.
The fund also may invest extensively in derivative instruments, which are generally financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate, or index, and may relate to equity securities, fixed-income securities, interest rates, total return rates, currencies or currency exchange rates, and related indexes. The fund may invest in futures, options, foreign currency forward contracts, and swaps (including, but not limited to, credit default swaps, inflation swaps, interest rate swaps, variance swaps and total return swaps). The fund can take long and short positions in markets, securities and groups of securities through derivative instruments. The fund may at times emphasize total return swaps, based on individual securities or a basket of securities, including both equity and fixed-income securities.
The manager employs a "global multi-asset strategy" through a fusion of macroeconomic and microeconomic capabilities, and seeks to achieve long-term total return by delivering a diversified global portfolio that makes use of multiple strategies across various asset classes. It aims to exploit market cyclicality and a diverse array of inefficiencies across and within global markets to maximize risk-adjusted absolute return by investing in listed equity, equity-related and debt securities, and derivatives or other instruments, both for investment and hedging purposes. "Equity related" securities may include depositary receipts, as well as common, preferred and convertible preferred stocks and securities the values of which are tied to the price of stocks, such as rights, warrants and convertible debt securities, and securities convertible into or exchangeable for stocks.
The manager manages the fund's investment strategies dynamically over time, and will actively modify investment strategies and develop new strategies in response to additional research, changing market conditions, or other factors. As a result, the fund may experience high portfolio turnover. The fund's strategies seek to deliver returns commensurate with reasonable levels of risk and tangible diversification benefits, while having both sufficient liquidity and capacity to benefit the fund in a significant way.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. In addition, although the manager aims to maximize absolute return, there is no guarantee that the fund will generate positive returns. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk depending upon the nature of their support. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: credit default swaps; foreign currency forward contracts; futures contracts; interest rate swaps; options; swaps; variance swaps; and total return swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class C shares commenced operations on April 13, 2016. Because Class R2 and Class R4 shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class C shares, except that they do not include sales charges and would be lower if they did. Returns for Class R2 and Class R4 shares would have been substantially similar to returns of Class C shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class R2</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '17, 1.14%
Worst quarter: Q1 '18, -3.50%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class R2 shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-972-8696
(John Hancock Global Focused Strategies Fund - Classes R2 and R4) | (John Hancock Global Focused Strategies Fund) | ICE Bank of America Merrill Lynch U.S. Dollar 6-Month LIBOR Constant Maturity Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.00%
Since Inception rr_AverageAnnualReturnSinceInception 1.41%
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes R2 and R4) | (John Hancock Global Focused Strategies Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 1.55%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.61% [37]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.86%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [38]
Total annual fund operating expenses rr_ExpensesOverAssets 2.67%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [39]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.14% [40]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 217
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 779
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,368
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,964
Annual Return 2017 rr_AnnualReturn2017 1.96%
Annual Return 2018 rr_AnnualReturn2018 (6.05%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '17, 1.14%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.14%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q1 '18, –3.50%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.50%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (6.05%)
Since Inception rr_AverageAnnualReturnSinceInception (3.00%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes R2 and R4) | (John Hancock Global Focused Strategies Fund) | Class R2 | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.12%)
Since Inception rr_AverageAnnualReturnSinceInception (3.11%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes R2 and R4) | (John Hancock Global Focused Strategies Fund) | Class R2 | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (3.56%)
Since Inception rr_AverageAnnualReturnSinceInception (2.28%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Global Focused Strategies Fund - Classes R2 and R4) | (John Hancock Global Focused Strategies Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 1.55%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.61% [37]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.71%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [38]
Total annual fund operating expenses rr_ExpensesOverAssets 2.52%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [39]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.99% [40]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 202
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 734
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,293
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,816
1 Year rr_AverageAnnualReturnYear01 (6.05%)
Since Inception rr_AverageAnnualReturnSinceInception (3.00%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 24 to 26 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 169% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 169.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund allocates its assets to a number of investment strategies (Strategies), through which the fund will take both physical and synthetic long positions and synthetic short exposures in a variety of equity and derivative instruments. The fund may hold significant synthetic long and short exposures. Each Strategy will be managed by a separate portfolio management team pursuant to allocations provided by the advisor from time to time. For long positions, the manager generally uses bottom-up fundamental analysis to identify companies throughout the world that the manager believes are undervalued or expects to experience high levels of growth. The manager also seeks to identify sectors, industries, or asset classes that may be overvalued or may experience low levels of growth, and the fund may take significant synthetic long and short exposures in such areas. The fund generally will not invest in companies with a market capitalization below $500 million at the time of purchase. The fund's synthetic short exposures will primarily be maintained in derivatives on exchange-traded pooled investment vehicles (e.g., exchange-traded funds (ETFs)) and/or indices, but may be maintained in other vehicles. In certain circumstances, the fund's overall synthetic short exposures may equal or exceed the size of the fund's long positions. Generally, the fund does not intend to take synthetic short exposures to individual stocks. The fund also may invest in master limited partnerships. The fund may trade securities actively.
Derivative instruments in which the fund may hold physical and synthetic long positions or synthetic short exposures include futures and forward contracts, such as interest-rate futures and foreign currency forward contracts; swaps, such as interest-rate swaps, credit default swaps, or total return swaps; call and put options; or warrants and rights, and may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns. The fund may also invest in repurchase agreements and reverse repurchase agreements.
The Strategies are typically diversified across sectors or focus on individual sectors, including financial services, healthcare, information technology, energy, biotechnology, and/or natural resources. Strategies and the allocations among them may vary. Each Strategy has a distinct investment philosophy and an analytical process based on a number of factors, such as business environment, management quality, balance sheet, income statement, anticipated earnings, expected growth rates, revenues, dividends, and other measures of value. As a result, the aggregate portfolio will represent a wide range of investment philosophies, companies, industries, and market capitalizations.
The manager may also invest in debt instruments, including high yield debt instruments (i.e., junk bonds). Such instruments may include, but are not limited to, bonds, bank loans (including loan participations), asset-backed securities, mortgage-backed securities, convertible securities, foreign currency-denominated foreign securities, U.S. and foreign government securities, hybrid securities (including convertible bonds, contingent convertible/capital securities, and similarly structured securities), derivatives, currencies, and reverse repurchase agreements. Some loans may be illiquid. Derivative instruments also may magnify the fund's gains and losses. The fund's derivative transactions will be fully collateralized.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 6 of the prospectus.
Biotechnology industry risk. Biotechnology companies are subject to regulatory requirements, intense competition, rapid technological and other developments that could negatively affect the price, profitability, viability, and availability of their products and services. Investments in this industry are often based on speculation regarding future research and product developments.
Convertible securities risk. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. As the market price of underlying common stock declines below the conversion price, the market value of the convertible security tends to be increasingly influenced by its yield.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk depending upon the nature of their support. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Energy sector risk. The energy sector is cyclical and highly dependent on commodities prices, which may be volatile. The market value of energy companies can be significantly affected by a number of factors, including global energy price volatility, supply and demand, exchange- and interest-rate fluctuation, and domestic and foreign political and economic developments. Energy companies also face a significant risk of civil liability.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Financial services sector risk. Financial services companies can be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Healthcare sector risk. Health sciences companies may be significantly affected by product obsolescence, thin capitalization, limited product lines and markets, civil liability claims, and legislative or regulatory activities, among other factors.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: credit default swaps, foreign currency forward contracts, futures contracts, options, interest rate swaps, total return swaps, reverse repurchase agreements, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk. An event of default or insolvency of the counterparty to a reverse repurchase agreement could result in delays or restrictions with respect to the fund's ability to dispose of the underlying securities. In addition, a reverse repurchase agreement may be considered a form of leverage and may, therefore, increase fluctuations in the fund's net asset value per share (NAV).
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Hybrid instrument risk. Hybrid instruments entail greater market risk and may be more volatile than traditional debt instruments, may bear interest or pay preferred dividends at below-market rates, and may be illiquid. The risks of investing in hybrid instruments are a combination of the risks of investing in securities, options, futures, and currencies.
Information technology risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Leveraging risk. Using derivatives may result in a leveraged portfolio. Leveraging long exposures increases a fund's losses when the value of its investments declines. Some derivatives have the potential for unlimited loss, regardless of the size of the initial investment.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Loan participations risk. Participations and assignments involve special types of risks, including credit risk, interest-rate risk, counterparty risk, liquidity risk, risks associated with extended settlement, and the risks of being a lender.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Mortgage-backed and asset-backed securities risk. Mortgage-backed and asset-backed securities are subject to different combinations of prepayment, extension, interest-rate, and other market risks.
Natural resources industry risk. The natural resources industry can be significantly affected by international political and economic developments, energy conservation and exploration efforts, commodity prices, and taxes and other governmental regulations, among other factors.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Synthetic short exposure risk. The fund will gain synthetic short exposure through a forward commitment through a swap agreement. Synthetic short exposures involve the risk that losses may be exaggerated, potentially losing more money than the actual cost of the investment.
Technology companies risk. Technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A and Class C shares commenced operations on December 20, 2013, and May 16, 2014, respectively. Returns prior to Class C shares' commencement date are those of Class A shares, except that they do not include Class A sales charges and would be lower if they did. Returns for Class C shares would have been substantially similar to returns of Class A shares because both share classes are invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 6.65%
Worst quarter: Q4 '18, -7.49%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | MSCI World Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.71%)
5 Years rr_AverageAnnualReturnYear05 4.56%
Since Inception rr_AverageAnnualReturnSinceInception 5.08%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 1.47%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 2.00%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [41]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.99%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 692
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,095
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,523
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,710
Annual Return 2014 rr_AnnualReturn2014 1.29%
Annual Return 2015 rr_AnnualReturn2015 7.71%
Annual Return 2016 rr_AnnualReturn2016 (4.90%)
Annual Return 2017 rr_AnnualReturn2017 15.43%
Annual Return 2018 rr_AnnualReturn2018 (4.56%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 6.65%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.65%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –7.49%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (7.49%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (9.33%)
5 Years rr_AverageAnnualReturnYear05 1.66%
Since Inception rr_AverageAnnualReturnSinceInception 1.75%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (10.04%)
5 Years rr_AverageAnnualReturnYear05 1.10%
Since Inception rr_AverageAnnualReturnSinceInception 1.19%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.01%)
5 Years rr_AverageAnnualReturnYear05 1.29%
Since Inception rr_AverageAnnualReturnSinceInception 1.36%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 1.47%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 2.70%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [41]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.69%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 372
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 837
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,429
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,031
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 272
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 837
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,429
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,031
1 Year rr_AverageAnnualReturnYear01 (6.14%)
5 Years rr_AverageAnnualReturnYear05 2.05%
Since Inception rr_AverageAnnualReturnSinceInception 2.14%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 1.47%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.24%
Total annual fund operating expenses rr_ExpensesOverAssets 1.71%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [41]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.70%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 173
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 538
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 927
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,019
1 Year rr_AverageAnnualReturnYear01 (4.23%)
5 Years rr_AverageAnnualReturnYear05 3.05%
Since Inception rr_AverageAnnualReturnSinceInception 3.14%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Seaport Long/Short Fund - Classes A, C, I and R6) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 1.47%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 1.60%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [41]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.59%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 162
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 504
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 870
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,899
1 Year rr_AverageAnnualReturnYear01 (4.11%)
5 Years rr_AverageAnnualReturnYear05 3.20%
Since Inception rr_AverageAnnualReturnSinceInception 3.28%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 18 to 20 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 102% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 102.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of small-capitalization companies. The fund considers small-capitalization companies to be those that, at the time of investment, are in the capitalization range of the Russell 2000 Index, with a maximum capitalization of $5 billion as of December 31, 2018. The fund generally will not invest in companies that, at the time of purchase, have market capitalizations of $5 billion or more. Equity securities include common and preferred stocks, rights, warrants, and depositary receipts.
The manager emphasizes a fundamental, bottom-up approach to individual stock selection, looking for companies with durable, niche business models with the potential for high returns on capital and that the manager believes are undervalued. Companies are screened based on a number of factors, including balance sheet quality, profitability, liquidity, size, and risk profile.
The fund intends to invest in a number of different sectors based on stock selection and sector weightings may vary significantly from its benchmark. The fund may focus its investments in a particular sector or sectors. The fund may invest up to 10% of its total assets in foreign securities including emerging-market securities and securities of non-U.S. companies traded on a U.S. exchange.
The fund may invest in initial public offerings (IPOs), real estate investment trusts (REITs) or other real estate-related equity securities, and certain exchange-traded funds (ETFs).
The fund normally will invest 10% or less of its total assets in cash and cash equivalents, including repurchase agreements, money market securities, U.S. government securities, and other short-term investments. The fund may invest in derivatives to a limited extent. Derivatives may be used to reduce risk and/or obtain efficient market exposure, and may include futures contracts and foreign currency forward contracts.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk based on the nature of their support.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts and futures contracts. Foreign currency forward contracts and futures contracts generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Initial public offerings risk. IPO share prices are frequently volatile and may significantly impact fund performance.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred stock risk. Preferred stock generally ranks senior to common stock with respect to dividends and liquidation but ranks junior to debt securities. Unlike interest payments on debt securities, preferred stock dividends are payable only if declared by the issuer's board of directors. Preferred stock may be subject to optional or mandatory redemption provisions.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Real estate securities risk. Securities of companies in the real estate industry carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A and Class I shares commenced operations on December 20, 2013. Class A shares ceased operations between March 10, 2016 and August 30, 2017. Returns while Class A shares were not offered are those of Class I shares that include Class A sales charges. Class R6 shares commenced operations on August 30, 2017. Returns prior to Class R6 shares' commencement date are those of Class A shares, except that they do not include sales charges and would be lower if they did. Returns for Class A, Class I, and Class R6 shares would have been substantially similar because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '16, 10.58%
Worst quarter: Q4 '18, -19.51%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund) | Russell 2000 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (11.01%)
5 Years rr_AverageAnnualReturnYear05 4.41%
Since Inception rr_AverageAnnualReturnSinceInception 5.09%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.86%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.25% [42]
Total annual fund operating expenses rr_ExpensesOverAssets 1.36%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [43]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.35%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 631
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 908
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,207
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,052
Annual Return 2014 rr_AnnualReturn2014 (1.11%)
Annual Return 2015 rr_AnnualReturn2015 (1.71%)
Annual Return 2016 rr_AnnualReturn2016 27.04%
Annual Return 2017 rr_AnnualReturn2017 16.07%
Annual Return 2018 rr_AnnualReturn2018 (18.36%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '16, 10.58%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 10.58%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2016
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –19.51%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.51%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (22.42%)
5 Years rr_AverageAnnualReturnYear05 2.14%
Since Inception rr_AverageAnnualReturnSinceInception 2.53%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (23.32%)
5 Years rr_AverageAnnualReturnYear05 0.97%
Since Inception rr_AverageAnnualReturnSinceInception 1.37%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (12.59%)
5 Years rr_AverageAnnualReturnYear05 1.50%
Since Inception rr_AverageAnnualReturnSinceInception 1.81%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.86%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.26% [42]
Total annual fund operating expenses rr_ExpensesOverAssets 1.12%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [43]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.11%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 113
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 355
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 616
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,362
1 Year rr_AverageAnnualReturnYear01 (18.21%)
5 Years rr_AverageAnnualReturnYear05 3.36%
Since Inception rr_AverageAnnualReturnSinceInception 3.77%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Small Cap Core Fund - Classes A, I and R6) | (John Hancock Small Cap Core Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.86%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.15% [42]
Total annual fund operating expenses rr_ExpensesOverAssets 1.01%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [43]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 321
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 557
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,235
1 Year rr_AverageAnnualReturnYear01 (18.17%)
5 Years rr_AverageAnnualReturnYear05 3.28%
Since Inception rr_AverageAnnualReturnSinceInception 3.67%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek capital appreciation over the long term.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds. Intermediaries may have different policies and procedures regarding the availability of front-end sales charge waivers or CDSC waivers (See Appendix 1 - Intermediary sales charge waivers, which includes information about specific sales charge waivers applicable to the intermediaries identified therein). More information about these and other discounts is available from your financial representative and on pages 17 to 19 of this prospectus under "Sales charge reductions and waivers" or pages 155 to 159 of the fund's Statement of Additional Information under "Sales Charges on Class A, Class B, and Class C Shares."
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the John Hancock family of funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then, except as shown below, assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Sold</b></div>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Not Sold</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 32% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 32.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, the fund invests at least 80% of its net assets in the equity securities of large and medium capitalization companies. The fund considers "large and medium capitalization companies" to be those with market capitalizations within the range of the market capitalizations in the Russell 1000 Index, $364.6 million to $780.1 billion as of December 31, 2018. The fund may invest in securities of companies with any market capitalization. Equity securities include common and preferred stock and their equivalents, such as depositary receipts, rights and warrants.
The fund invests primarily in common stocks of value-oriented companies, which generally have, among other characteristics, lower price-to-book ratios, lower forecasted growth values, and higher dividend yields relative to the broader market. The fund may invest up to 15% of its total assets in American Depositary receipts (ADRs), receipts issued by a U.S. bank or trust company evidencing ownership of securities issued by a foreign corporation. The fund also may invest in certain types of exchange-traded derivative instruments in order to "equitize" cash balances by gaining exposure to relevant equity markets. The fund may invest in futures and foreign currency forward contracts to reduce risk, obtain efficient market exposure, and/or enhance investment returns.
The manager selects stocks of companies that it believes are undervalued relative to their industry, market, or sector. In its selection process, the manager may consider factors such as price-to-book ratio, price-to-earnings ratio, dividend yield, projected earnings growth, and profitability. The fund may focus its investments in a particular sector or sectors of the economy.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts and futures contracts. Foreign currency forward contracts and futures contracts generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Value investment risk. Value stocks may underperform the market as a whole, which may cause value-oriented funds to underperform equity funds with other investment strategies. Securities the manager believes are undervalued may never perform as expected.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were) </b></div>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads sales charges are not reflected in the bar chart and returns would have been lower if they were
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q4 '16, 8.33%
Worst quarter: Q4 '18, -14.66%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class A shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone calling 800-225-5291 (Class A and Class C), Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time, or 888-972-8696 (Class I and Class R6) between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.27%)
Since Inception rr_AverageAnnualReturnSinceInception 4.74%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 1.26%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [44]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.11%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 608
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 866
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,143
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,934
Annual Return 2015 rr_AnnualReturn2015 (1.41%)
Annual Return 2016 rr_AnnualReturn2016 13.14%
Annual Return 2017 rr_AnnualReturn2017 17.08%
Annual Return 2018 rr_AnnualReturn2018 (11.34%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q4 '16, 8.33%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.33%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –14.66%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.66%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (15.78%)
Since Inception rr_AverageAnnualReturnSinceInception 2.76%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (17.32%)
Since Inception rr_AverageAnnualReturnSinceInception 1.89%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.16%)
Since Inception rr_AverageAnnualReturnSinceInception 2.16%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther 1.00%
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther $ 20
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 1.96%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [44]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 284
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 601
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,043
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,273
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 184
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 601
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,043
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,273
1 Year rr_AverageAnnualReturnYear01 (12.76%)
Since Inception rr_AverageAnnualReturnSinceInception 3.23%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.19%
Total annual fund operating expenses rr_ExpensesOverAssets 0.97%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [44]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 84
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 294
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 522
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,176
1 Year rr_AverageAnnualReturnYear01 (11.07%)
Since Inception rr_AverageAnnualReturnSinceInception 4.25%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes A, C, I and R6) | (John Hancock Value Equity Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Small account fee (for fund account balances under $1,000) ($) rr_ShareholderFeeOther none
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.08%
Total annual fund operating expenses rr_ExpensesOverAssets 0.86%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [44]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.71%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 73
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 259
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 462
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,047
1 Year rr_AverageAnnualReturnYear01 (10.94%)
Since Inception rr_AverageAnnualReturnSinceInception 4.44%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek capital appreciation over the long term.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2, Class R4, and Class R5 shares.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 32% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 32.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, the fund invests at least 80% of its net assets in the equity securities of large and medium capitalization companies. The fund considers "large and medium capitalization companies" to be those with market capitalizations within the range of the market capitalizations in the Russell 1000 Index, $364.6 million to $780.1 billion as of December 31, 2018. The fund may invest in securities of companies with any market capitalization. Equity securities include common and preferred stock and their equivalents, such as depositary receipts, rights and warrants.
The fund invests primarily in common stocks of value-oriented companies, which generally have, among other characteristics, lower price-to-book ratios, lower forecasted growth values, and higher dividend yields relative to the broader market. The fund may invest up to 15% of its total assets in American Depositary receipts (ADRs), receipts issued by a U.S. bank or trust company evidencing ownership of securities issued by a foreign corporation. The fund also may invest in certain types of exchange-traded derivative instruments in order to "equitize" cash balances by gaining exposure to relevant equity markets. The fund may invest in futures and foreign currency forward contracts to reduce risk, obtain efficient market exposure, and/or enhance investment returns.
The manager selects stocks of companies that it believes are undervalued relative to their industry, market, or sector. In its selection process, the manager may consider factors such as price-to-book ratio, price-to-earnings ratio, dividend yield, projected earnings growth, and profitability. The fund may focus its investments in a particular sector or sectors of the economy.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts and futures contracts. Foreign currency forward contracts and futures contracts generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Value investment risk. Value stocks may underperform the market as a whole, which may cause value-oriented funds to underperform equity funds with other investment strategies. Securities the manager believes are undervalued may never perform as expected.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days.
A note on performance
Class A shares commenced operations on June 26, 2014. Because Class R2, Class R4, and Class R5 shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class A shares, except that they do not include Class A sales charges and would be lower if they did. Returns for Class R2, Class R4, and Class R5 shares would have been substantially similar to returns of Class A shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan. After-tax returns for other share classes would vary.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class R2</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q4 '16, 8.33%
Worst quarter: Q4 '18, -14.66%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns (shown for Class R2 shares only) reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-972-8696
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund) | Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.27%)
Since Inception rr_AverageAnnualReturnSinceInception 4.74%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08% [45]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.33%
Total annual fund operating expenses rr_ExpensesOverAssets 1.36%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [46]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.21%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 123
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 416
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 730
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,622
Annual Return 2015 rr_AnnualReturn2015 (1.41%)
Annual Return 2016 rr_AnnualReturn2016 13.14%
Annual Return 2017 rr_AnnualReturn2017 17.08%
Annual Return 2018 rr_AnnualReturn2018 (11.34%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q4 '16, 8.33%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.33%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –14.66%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.66%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (11.34%)
Since Inception rr_AverageAnnualReturnSinceInception 3.94%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund) | Class R2 | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (12.96%)
Since Inception rr_AverageAnnualReturnSinceInception 3.06%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund) | Class R2 | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.48%)
Since Inception rr_AverageAnnualReturnSinceInception 3.08%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08% [45]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 1.21%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [46]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 108
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 369
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 651
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,453
1 Year rr_AverageAnnualReturnYear01 (11.34%)
Since Inception rr_AverageAnnualReturnSinceInception 3.94%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Value Equity Fund - Classes R2, R4 and R5) | (John Hancock Value Equity Fund) | Class R5  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.78%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets 0.05%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.08% [45]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.13%
Total annual fund operating expenses rr_ExpensesOverAssets 0.91%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [46]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.76%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 78
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 275
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 489
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,106
1 Year rr_AverageAnnualReturnYear01 (11.34%)
Since Inception rr_AverageAnnualReturnSinceInception 3.94%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Disciplined Value International Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 95% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 95.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund pursues its investment objective by investing, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a portfolio of equity and equity-related securities issued by non-U.S. companies of any capitalization size. The fund may invest in all types of equity and equity-related securities, including, without limitation, exchange-traded and over-the-counter common and preferred stocks, warrants, options, rights, convertible securities, sponsored and unsponsored depositary receipts and shares, trust certificates, participatory notes, limited partnership interests, shares of other investment companies (including exchange-traded funds (ETFs)), real estate investment trusts (REITs), and equity participations. Equity participations are loans that give the lender a portion of equity ownership in a property, in addition to principal and interest payments. A convertible security is a bond, debenture, note, preferred stock, or other security that may be converted into or exchanged for a prescribed amount of common stock of the same or a different issuer within a particular period of time at a specified price or formula.
The fund defines non-U.S. companies as companies: (i) that are organized under the laws of a foreign country; (ii) whose principal trading market is in a foreign country; or (iii) that have a majority of their assets, or that derive a significant portion of their revenue or profits, from businesses, investments, or sales outside of the United States. The fund's non-U.S. investments, which may be denominated in U.S. or foreign currencies, primarily focus on developed markets, but may include emerging- and frontier-market investments.
The fund generally invests in the equity securities of issuers the manager believes are undervalued. The manager applies a bottom-up stock selection process using a combination of fundamental and quantitative analysis of issuer-specific factors such as price-to-book value, price-to-sales and earnings ratios, dividend yields, strength of management, and cash flow.
The fund may invest in derivatives. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include put and call options, futures, forward contracts, and swaps. The fund may invest up to 15% of its net assets in illiquid securities and may participate as a purchaser in Initial Public Offerings (IPOs). The fund may also seek to increase its income by lending portfolio securities.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Frontier-market risk. Frontier-market countries generally have smaller economies and less-developed capital markets and political systems than traditional emerging-market countries, which magnifies emerging-market risks.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
Initial public offerings risk. IPO share prices are frequently volatile and may significantly impact fund performance.
Investment company securities risk. A fund bears underlying fund fees and expenses indirectly.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Participatory notes risk. Due to transaction costs and other expenses, participatory notes (p-notes) will not replicate exactly the performance of their underlying securities. P-notes are general unsecured contractual obligations that are subject to liquidity risk and a high degree of counterparty risk.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Value investment risk. Value stocks may underperform the market as a whole, which may cause value-oriented funds to underperform equity funds with other investment strategies. Securities the manager believes are undervalued may never perform as expected.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
A note on performance
The fund is the successor to Robeco Boston Partners International Equity Fund, a series of The RBB Fund, Inc. (the predecessor fund), which commenced operations on December 30, 2011. Class R6 and Class NAV shares commenced operations on September 29, 2014 and April 13, 2015, respectively. The returns prior to the commencement date of Class NAV shares are those of Class R6 shares. The returns prior to the commencement date of Class R6 shares is the actual performance of the sole share class of the predecessor fund and has not been adjusted to reflect the fees and expenses of Class R6 shares. As a result, the performance shown below may be higher than if adjusted to reflect the fees and expenses of Class R6 shares.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '13, 11.58%
Worst quarter: Q4 '18, -15.03%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Disciplined Value International Fund) | MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (13.79%)
5 Years rr_AverageAnnualReturnYear05 0.53%
Since Inception rr_AverageAnnualReturnSinceInception 5.95%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Disciplined Value International Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.81%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.09%
Total annual fund operating expenses rr_ExpensesOverAssets 0.90%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [47]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 90
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 285
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 497
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,106
Annual Return 2012 rr_AnnualReturn2012 16.89%
Annual Return 2013 rr_AnnualReturn2013 29.84%
Annual Return 2014 rr_AnnualReturn2014 (5.03%)
Annual Return 2015 rr_AnnualReturn2015 1.86%
Annual Return 2016 rr_AnnualReturn2016 (0.18%)
Annual Return 2017 rr_AnnualReturn2017 25.37%
Annual Return 2018 rr_AnnualReturn2018 (18.49%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '13, 11.58%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.58%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2013
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –15.03%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.03%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (18.49%)
5 Years rr_AverageAnnualReturnYear05 (0.27%)
Since Inception rr_AverageAnnualReturnSinceInception 5.93%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Disciplined Value International Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (19.58%)
5 Years rr_AverageAnnualReturnYear05 (1.24%)
Since Inception rr_AverageAnnualReturnSinceInception 4.68%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Disciplined Value International Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (10.55%)
5 Years rr_AverageAnnualReturnYear05 (0.40%)
Since Inception rr_AverageAnnualReturnSinceInception 4.46%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 2011
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Emerging Markets Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 50% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 50.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity and equity-related securities of emerging-market issuers. The manager may consider, but is not limited to, the classifications by the World Bank, the International Finance Corporation, or the United Nations and its agencies in determining whether a country is an emerging- or a developed-market country. The fund seeks to invest in securities that the manager considers to be undervalued or otherwise offer good prospects for capital growth.
The fund intends to invest in equity securities listed on bona fide securities exchanges or actively traded on over-the-counter markets. Equity and equity-related securities include common stocks, preferred stocks, convertible securities, warrants, and other similar securities. The fund may also invest in other investment companies (including closed-end funds) and other pooled investment vehicles that also invest in developing or emerging market economies.
Fundamentals-based stock selection lies at the heart of the manager's investment process, which focuses on high quality companies within a diverse range of dynamic emerging economies. The manager seeks to invest in companies with strong assets that exhibit balance sheet strength, superior management, and high levels of free cash-flow to support a sustainable dividend payout. Although, there is no sector or geographical bias, the fund may focus its investments in a particular sector or sectors of the economy. The fund may invest in companies of any market capitalization.
Due to volatile conditions in emerging markets, the fund's investment process may result in a higher-than-average portfolio turnover ratio, which could increase transaction costs.
The fund may attempt to mitigate the risk of unintended currency fluctuations through the use of exchange-listed or over-the-counter financial derivatives instruments, including currency forwards, non-deliverable forwards, currency options, and index options. The fund may also enter into forward currency contracts to facilitate the settlement of foreign securities purchases, repatriation of foreign currency balances, or exchange of one currency to another. The fund may use derivatives such as futures contracts and options on futures contracts to gain market exposure on uninvested cash, pending investment in securities, or to maintain liquidity to pay redemptions.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Emerging-market risk. The risks of investing in foreign securities are magnified in emerging markets. Emerging-market countries may experience higher inflation, interest rates, and unemployment and greater social, economic, and political uncertainties than more developed countries.
Greater China risk. Investments in the Greater China region may be subject to less developed trading markets, acute political risks such as possible negative repercussions resulting from China's relationship with Taiwan or Hong Kong, and restrictions on monetary repatriation or other adverse government actions. For example, a government may restrict investment in companies or industries considered important to national interests, or intervene in the financial markets, such as by imposing trading restrictions, or banning or curtailing short selling. A small number of companies and industries represent a relatively large portion of the Greater China market.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Financial services sector risk. Financial services companies can be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, options on futures, and currency options. Foreign currency forward contracts, futures contracts, and options generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Investment company securities risk. A fund bears underlying fund fees and expenses indirectly.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 11.87%
Worst quarter: Q4 '18, -10.84%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Emerging Markets Equity Fund) | MSCI Emerging Markets Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.58%)
Since Inception rr_AverageAnnualReturnSinceInception 2.31%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Emerging Markets Equity Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.95%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.09%
Total annual fund operating expenses rr_ExpensesOverAssets 1.04%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [48]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.03%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 105
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 330
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 573
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,270
Annual Return 2016 rr_AnnualReturn2016 2.72%
Annual Return 2017 rr_AnnualReturn2017 42.25%
Annual Return 2018 rr_AnnualReturn2018 (16.87%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 11.87%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.87%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –10.84%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (10.84%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (16.87%)
Since Inception rr_AverageAnnualReturnSinceInception 0.93%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Emerging Markets Equity Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (18.48%)
Since Inception rr_AverageAnnualReturnSinceInception 0.14%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Emerging Markets Equity Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.07%)
Since Inception rr_AverageAnnualReturnSinceInception 0.60%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 16, 2015
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG All Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of any market capitalization or sector that meet the manager's sustainability criteria. Equity securities include common and preferred stocks and their equivalents. The manager seeks companies meeting its sustainability criteria with high quality characteristics including strong environmental, social, and governance (ESG) records.
The manager employs a bottom-up financial analysis that includes a review of ESG issues and how they may impact stock valuation or performance. ESG factors reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, and supply chain and human rights policies. Companies that meet the manager's ESG requirements or sustainability criteria typically have strong sustainability data and policy reporting, for example publishing a comprehensive corporate sustainability report. The fund may also invest up to 20% of its total assets in the equity securities of foreign issuers, including American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). The fund may focus its investments in a particular sector or sectors of the economy. The manager may sell stocks for several reasons, including when the stock no longer meets the manager's ESG or sustainability criteria, or when the stock declines in value and no longer reflects the manager's investment thesis. The fund will not invest in any companies with material exposure to agricultural biotechnology, coal mining, hard rock mining, nuclear power, tar sands, tobacco, or weapons/firearms. The fund also will not invest in any companies with major recent or ongoing controversies involving animal welfare, environmental, governance, human rights, product safety, or workplace matters.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies, and may file shareholder proposals on behalf of the fund. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
A note on performance
Class C shares commenced operations on June 6, 2016. Because Class NAV shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class C shares, except that they do not include sales charges and would be lower if they did. Returns for Class NAV shares would have been substantially similar to returns of Class C shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '18, 6.64%
Worst quarter: Q4 '18, -13.07%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG All Cap Core Fund) | S&P Composite 1500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.96%)
Since Inception rr_AverageAnnualReturnSinceInception 9.06%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG All Cap Core Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.73%
Total annual fund operating expenses rr_ExpensesOverAssets 1.48%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [47]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 402
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 744
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,711
Annual Return 2017 rr_AnnualReturn2017 17.22%
Annual Return 2018 rr_AnnualReturn2018 (4.16%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '18, 6.64%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.64%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2018
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –13.07%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (13.07%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (4.16%)
Since Inception rr_AverageAnnualReturnSinceInception 6.92%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG All Cap Core Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.10%)
Since Inception rr_AverageAnnualReturnSinceInception 6.24%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG All Cap Core Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.75%)
Since Inception rr_AverageAnnualReturnSinceInception 5.32%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in stocks of foreign companies having a market capitalization of $2 billion or more at the time of purchase that meet the manager's sustainability criteria. The manager seeks companies meeting its sustainability criteria with high-quality characteristics, including strong or improving environmental, social, and governance (ESG) records.
The fund primarily invests in a diversified portfolio of equity securities of foreign companies in a number of developed and emerging markets outside of the United States. The fund defines foreign companies as companies: (i) that are organized under the laws of a country outside the United States; or (ii) that have a minimum of 50% of their assets, or that derive a minimum of 50% of their revenue or profits, from businesses, investments, or sales outside of the United States.
The manager seeks to preserve and build capital over the long term through investing in a diversified portfolio of international-developed and emerging-market stocks of companies it believes are high quality and under-valued. The manager looks for companies with sound governance and a history of responsible financial management that, in its opinion, are capable of consistent profitability over a long time horizon. The manager seeks to fully integrate ESG criteria into the stock selection and portfolio construction process and expresses a preference for best-in-class firms with innovative approaches to the environmental and social challenges their industries, society, and the world face. "Best-in-class" refers to firms that the manager views as having better records on ESG criteria than other firms in the same industry or sector.
The manager seeks to identify companies with a demonstrated overall high level of accountability to all stakeholders, including providing safe, desirable, high-quality products or services and marketing them in responsible ways. ESG criteria reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, water management policies, and supply chain and human rights policies. The fund may focus its investments in a particular sector or sectors of the economy. The fund will avoid investments that in the judgment of the manager have material direct revenues from production of nuclear power, tobacco, and/or weapons/firearms.
The manager selects stocks through bottom-up, fundamental research, while maintaining a disciplined approach to valuation and risk control. The manager may sell a security when its price reaches a set target, if it believes that other investments are more attractive, when in its opinion ESG performance significantly deteriorates, or for other reasons it may determine.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
A note on performance
Class A shares commenced operations on December 14, 2016. Because Class NAV shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class A shares, except that they do not include sales charges and would be lower if they did. Returns for Class NAV shares would have been substantially similar to returns of Class A shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 9.87%
Worst quarter: Q4 '18, -11.72%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG International Equity Fund) | MSCI All Country World ex–USA Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (14.20%)
Since Inception rr_AverageAnnualReturnSinceInception 3.81%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG International Equity Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.85%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.41%
Total annual fund operating expenses rr_ExpensesOverAssets 1.26%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.35%) [47]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 93
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 365
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 658
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,492
Annual Return 2017 rr_AnnualReturn2017 30.34%
Annual Return 2018 rr_AnnualReturn2018 (13.08%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 9.87%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.87%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.72%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.72%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (13.08%)
Since Inception rr_AverageAnnualReturnSinceInception 6.44%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG International Equity Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (13.43%)
Since Inception rr_AverageAnnualReturnSinceInception 6.14%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG International Equity Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (7.23%)
Since Inception rr_AverageAnnualReturnSinceInception 5.06%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 14, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG Large Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 22% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of large-capitalization companies or sectors that meet the manager's sustainability criteria. The fund considers large-capitalization companies to be those companies in the capitalization range of the S&P 500 Index, which was approximately $2.31 billion to $785.03 billion as of December 31, 2018. Equity securities include common and preferred stocks and their equivalents. The manager seeks companies meeting its sustainability criteria with high quality characteristics including strong environmental, social, and governance (ESG) records.
The manager employs a bottom-up financial analysis that includes a review of ESG issues and how they may impact stock valuation or performance. ESG factors reflect a variety of key sustainability issues that can influence company risks and opportunities and span a range of metrics including board diversity, climate change policies, and supply chain and human rights policies. Companies that meet the manager's ESG requirements or sustainability criteria typically have strong sustainability data and policy reporting, for example publishing a comprehensive corporate sustainability report. The fund may also invest up to 20% of its total assets in the equity securities of foreign issuers, including American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). The fund may focus its investments in a particular sector or sectors of the economy. The manager may sell stocks for several reasons, including when the stock no longer meets the manager's ESG or sustainability criteria, or when the stock declines in value and no longer reflects the manager's investment thesis. The fund will not invest in any companies with material exposure to agricultural biotechnology, coal mining, hard rock mining, nuclear power, tar sands, tobacco, or weapons/firearms. The fund also will not invest in any companies with major recent or ongoing controversies involving animal welfare, environmental, governance, human rights, product safety, or workplace matters.
The manager employs active shareowner engagement to raise environmental, social, and governance issues with the management of select portfolio companies, and may file shareholder proposals on behalf of the fund. Through this effort, the manager seeks to encourage company managements toward greater transparency, accountability, disclosure, and commitment to ESG issues.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Information technology risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Responsible investing risk. Investing primarily in responsible investments carries the risk that the fund may underperform funds that do not utilize a responsible investment strategy.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Sustainability (ESG) policy risk. The fund's ESG policy could cause it to perform differently compared to similar funds that do not have such a policy.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
A note on performance
Class C shares commenced operations on June 6, 2016. Because Class NAV shares of the fund had not commenced operations as of the date of this prospectus, the returns shown are those of Class C shares, except that they do not include sales charges and would be lower if they did. Returns for Class NAV shares would have been substantially similar to returns of Class C shares because each share class is invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '18, 7.88%
Worst quarter: Q4 '18, -11.37%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG Large Cap Core Fund) | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.38%)
Since Inception rr_AverageAnnualReturnSinceInception 9.32%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG Large Cap Core Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.75%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.45%
Total annual fund operating expenses rr_ExpensesOverAssets 1.20%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) [47]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 342
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 622
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,420
Annual Return 2017 rr_AnnualReturn2017 15.39%
Annual Return 2018 rr_AnnualReturn2018 (0.97%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '18, 7.88%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.88%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2018
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –11.37%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.37%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (0.97%)
Since Inception rr_AverageAnnualReturnSinceInception 7.44%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG Large Cap Core Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.37%)
Since Inception rr_AverageAnnualReturnSinceInception 7.16%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock ESG Large Cap Core Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.27%)
Since Inception rr_AverageAnnualReturnSinceInception 5.74%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 06, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Fundamental Large Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 47.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of large-capitalization companies. The fund considers large-capitalization companies to be those in the capitalization range of the S&P 500 Index, which was approximately $3 billion to $780 billion as of December 31, 2018. Equity securities include common and preferred stocks and their equivalents.
The manager looks to invest in companies that are undervalued and/or offer the potential for above-average earnings growth, using a combination of proprietary financial models and bottom-up, fundamental financial research to identify companies with substantial cash flows, reliable revenue streams, superior competitive positions, and strong management.
The fund manages risk by typically holding between 45 and 65 large companies in a broad range of industries. The fund may focus its investments in a particular sector or sectors of the economy. The fund may attempt to take advantage of short-term market volatility by investing in corporate restructurings or pending acquisitions. The fund may invest up to 35% of its assets in foreign securities and may trade securities actively.
The fund may invest up to 20% of its assets in bonds of any maturity, including up to 15% of net assets in below-investment-grade bonds (i.e., junk bonds) rated as low as CC by Standard & Poor's Ratings Services or Ca by Moody's Investors Service, Inc. and their unrated equivalents. The manager looks for bonds with the most favorable risk/return ratios. The fund's investment policies are based on credit ratings at the time of purchase.
The fund may invest in derivatives to a limited extent. Derivatives may be used to reduce risk and/or obtain efficient market exposure, and may include futures contracts, options, and foreign currency forward contracts.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, and options. Foreign currency forward contracts, futures contracts, and options generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Merger and restructuring risk. A merger or other restructuring, tender offer, or exchange offer proposed or pending at the time of investment in risk arbitrage securities may not be completed on the terms contemplated, resulting in losses.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
A note on performance
Class A and Class NAV shares commenced operations on September 30, 1984 and February 8, 2017, respectively. Returns prior to Class NAV's commencement date are those of Class A shares, except that they do not include sales charges and would be lower if they did. Returns for Class NAV shares would have been substantially similar to returns of Class A shares because both share classes are invested in the same portfolio of securities and returns would differ only to the extent that expenses of the classes are different.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '09, 16.17%
Worst quarter: Q3 '11, -18.93%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Fundamental Large Cap Core Fund) | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.38%)
5 Years rr_AverageAnnualReturnYear05 8.49%
10 Years rr_AverageAnnualReturnYear10 13.12%
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Fundamental Large Cap Core Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.61%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.06%
Total annual fund operating expenses rr_ExpensesOverAssets 0.67%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [48]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.66%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 67
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 213
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 372
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 834
Annual Return 2009 rr_AnnualReturn2009 33.73%
Annual Return 2010 rr_AnnualReturn2010 14.20%
Annual Return 2011 rr_AnnualReturn2011 (9.03%)
Annual Return 2012 rr_AnnualReturn2012 20.18%
Annual Return 2013 rr_AnnualReturn2013 32.23%
Annual Return 2014 rr_AnnualReturn2014 7.84%
Annual Return 2015 rr_AnnualReturn2015 5.79%
Annual Return 2016 rr_AnnualReturn2016 10.07%
Annual Return 2017 rr_AnnualReturn2017 20.58%
Annual Return 2018 rr_AnnualReturn2018 (13.56%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '09, 16.17%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.17%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q3 '11, –18.93%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.93%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
1 Year rr_AverageAnnualReturnYear01 (13.56%)
5 Years rr_AverageAnnualReturnYear05 5.53%
10 Years rr_AverageAnnualReturnYear10 11.20%
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Fundamental Large Cap Core Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (16.18%)
5 Years rr_AverageAnnualReturnYear05 4.12%
10 Years rr_AverageAnnualReturnYear10 10.39%
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Fundamental Large Cap Core Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.39%)
5 Years rr_AverageAnnualReturnYear05 4.22%
10 Years rr_AverageAnnualReturnYear10 9.26%
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Global Focused Strategies Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term total return.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The "Total annual fund operating expenses after expense reimbursements" shown may not correlate to the fund's ratios of expenses to average daily net assets shown in the "Financial highlights" section of the fund's prospectus, which does not include "Acquired fund fees and expenses."
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 141% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 141.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund has a broad investment mandate that permits it to use an extensive range of investment strategies and to invest in a wide spectrum of equity and fixed-income securities, as well as derivative instruments, in pursuing its investment objective.
The fund invests in equity securities of U.S. and foreign companies of various market capitalizations, including preferred and convertible securities. The fund also invests in fixed-income securities, which are not subject to any credit rating or maturity limitations, issued by companies and government and supranational entities around the world, including higher-yielding below-investment-grade securities (i.e., junk bonds). The fund may invest in emerging as well as developed markets and may invest a significant portion of its assets in the securities of companies in particular economic sectors. Under normal market conditions, at least 40% of the value of the fund's net assets will be invested in or exposed to obligations of issuers or obligors located outside of the United States.
The fund also may invest extensively in derivative instruments, which are generally financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate, or index, and may relate to equity securities, fixed-income securities, interest rates, total return rates, currencies or currency exchange rates, and related indexes. The fund may invest in futures, options, foreign currency forward contracts, and swaps (including, but not limited to, credit default swaps, inflation swaps, interest rate swaps, variance swaps and total return swaps). The fund can take long and short positions in markets, securities and groups of securities through derivative instruments. The fund may at times emphasize total return swaps, based on individual securities or a basket of securities, including both equity and fixed-income securities.
The manager employs a "global multi-asset strategy" through a fusion of macroeconomic and microeconomic capabilities, and seeks to achieve long-term total return by delivering a diversified global portfolio that makes use of multiple strategies across various asset classes. It aims to exploit market cyclicality and a diverse array of inefficiencies across and within global markets to maximize risk-adjusted absolute return by investing in listed equity, equity-related and debt securities, and derivatives or other instruments, both for investment and hedging purposes. "Equity related" securities may include depositary receipts, as well as common, preferred and convertible preferred stocks and securities the values of which are tied to the price of stocks, such as rights, warrants and convertible debt securities, and securities convertible into or exchangeable for stocks.
The manager manages the fund's investment strategies dynamically over time, and will actively modify investment strategies and develop new strategies in response to additional research, changing market conditions, or other factors. As a result, the fund may experience high portfolio turnover. The fund's strategies seek to deliver returns commensurate with reasonable levels of risk and tangible diversification benefits, while having both sufficient liquidity and capacity to benefit the fund in a significant way.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. In addition, although the manager aims to maximize absolute return, there is no guarantee that the fund will generate positive returns. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk depending upon the nature of their support. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: credit default swaps; foreign currency forward contracts; futures contracts; interest rate swaps; options; swaps; variance swaps; and total return swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '17, 1.44%
Worst quarter: Q1 '18, -3.16%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Global Focused Strategies Fund) | ICE Bank of America Merrill Lynch U.S. Dollar 6-Month LIBOR Constant Maturity Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.00%
Since Inception rr_AverageAnnualReturnSinceInception 1.41%
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Global Focused Strategies Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 1.55%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.60% [49]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [50]
Total annual fund operating expenses rr_ExpensesOverAssets 2.16%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [51]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.63% [52]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 166
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 625
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,111
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,451
Annual Return 2017 rr_AnnualReturn2017 3.01%
Annual Return 2018 rr_AnnualReturn2018 (4.99%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '17, 1.44%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.44%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q1 '18, –3.16%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.16%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (4.99%)
Since Inception rr_AverageAnnualReturnSinceInception (1.94%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Global Focused Strategies Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.53%)
Since Inception rr_AverageAnnualReturnSinceInception (2.36%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Global Focused Strategies Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (2.95%)
Since Inception rr_AverageAnnualReturnSinceInception (1.62%)
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 13, 2016
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek total return from capital appreciation and income, with an emphasis on absolute returns over a full market cycle.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund pursues its objective by investing, under normal circumstances, at least 80% of its net assets (plus borrowings for investment purposes) in global securities of companies with infrastructure-related assets. For purposes of this policy, global securities include: common stock, depositary receipts, real estate securities (including real estate investment trusts (REITs)), master limited partnerships (MLPs) (up to a maximum of 25% of the fund's net assets), preferred stock, rights, warrants, exchange-traded funds (ETFs), and debt securities (up to a maximum of 20% of the fund's net assets). Also for purposes of this policy, infrastructure-related assets are long-lived physical assets that are held by companies, including financial holding companies, that engage in the ownership, management, construction, development, renovation, operation, use or financing of infrastructure assets, or that provide the services and raw materials necessary for the construction and maintenance of infrastructure assets. Infrastructure assets are the physical structures, networks and systems which provide necessary services for the function, growth and development of society, including but not limited to transportation and shipping, energy and utilities, water and sewage, communication, and social assets (e.g., hospitals, schools, prisons, stadiums, courthouses, subsidized housing).
Companies with long-lived physical assets are those that the manager believes possess an advantageous competitive position due to factors such as a long track record, resilience in the face of technological advances, rising replacement costs, and limited substitution risk. The manager believes investment in these types of companies can contribute to attractive, long-term absolute returns. The fund also seeks to mitigate losses during periods of unfavorable equity market conditions by attempting to limit volatility relative to the wider market. While not managed explicitly for yield, the securities in which the fund invests may often provide higher dividend yields than the broader equity market. The fund is not managed to track a benchmark index.
The fund may invest in debt securities, including convertible bonds, without any maturity limit and of any credit quality, including high-yield securities (i.e., junk bonds). The fund may also invest in cash, cash equivalents, and derivative instruments. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include swaps, forward contracts, options, currency derivatives (including currency forwards, futures, options, and spot transactions), and similar instruments or combinations thereof. Country and regional weights are driven by bottom-up security selection and are typically unconstrained; however, the fund will generally be diversified regionally across global equity markets, including emerging markets. The fund invests in companies across the market-capitalization spectrum.
The fund seeks to outperform global equity markets during periods of flat or negative market performance and may underperform during periods of strong market performance. The fund's investment returns may be volatile over short periods of time and returns over any period of time may not be positive. The maximum position in any individual security will typically be less than 10% of the fund's net assets. Generally, less than 10% of the fund's net assets will be invested in cash and cash equivalents, but can be as high as 20%.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Commodity risk. Commodity prices may be volatile due to fluctuating demand, supply disruption, speculation, and other factors. Certain commodity investments may have no active trading market at times.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Financial services sector risk. Financial services companies can be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Greater China risk. Investments in the Greater China region may be subject to less developed trading markets, acute political risks such as possible negative repercussions resulting from China's relationship with Taiwan or Hong Kong, and restrictions on monetary repatriation or other adverse government actions. For example, a government may restrict investment in companies or industries considered important to national interests, or intervene in the financial markets, such as by imposing trading restrictions, or banning or curtailing short selling. A small number of companies and industries represent a relatively large portion of the Greater China market.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts, futures contracts, options, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Midstream energy infrastructure sector risk. Midstream energy infrastructure companies, such as companies that provide crude oil, refined product, and natural gas services, are subject to supply-and-demand fluctuations in the markets they serve, which may be impacted by a wide range of factors.
Natural resources industry risk. The natural resources industry can be significantly affected by international political and economic developments, energy conservation and exploration efforts, commodity prices, and taxes and other governmental regulations, among other factors.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Real estate securities risk. Securities of companies in the real estate industry carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Telecommunications sector risk. Telecommunication services companies are subject to government regulation of services and rates of return and can be significantly affected by intense competition, among other factors.
Transportation sector risk. Transportation companies can be significantly affected by economic changes, fuel, maintenance, and insurance costs, labor relations, and government regulation, among other factors.
Utilities sector risk. Utilities companies' performance may be volatile due to variable fuel, service, and financing costs, conservation efforts, government regulation, and other factors.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q2 '14, 7.41%
Worst quarter: Q4 '16, -6.38%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | MSCI AC World Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.42%)
5 Years rr_AverageAnnualReturnYear05 4.26%
Since Inception rr_AverageAnnualReturnSinceInception 4.75%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.80% [53]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 0.97%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [54]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 304
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 531
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,185
Annual Return 2014 rr_AnnualReturn2014 8.25%
Annual Return 2015 rr_AnnualReturn2015 (3.19%)
Annual Return 2016 rr_AnnualReturn2016 4.59%
Annual Return 2017 rr_AnnualReturn2017 17.63%
Annual Return 2018 rr_AnnualReturn2018 (1.32%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q2 '14, 7.41%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.41%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2014
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '16, –6.38%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.38%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 (1.32%)
5 Years rr_AverageAnnualReturnYear05 4.93%
Since Inception rr_AverageAnnualReturnSinceInception 5.24%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (2.63%)
5 Years rr_AverageAnnualReturnYear05 3.88%
Since Inception rr_AverageAnnualReturnSinceInception 4.19%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Infrastructure Fund formerly John Hancock Enduring Assets Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.42%)
5 Years rr_AverageAnnualReturnYear05 3.39%
Since Inception rr_AverageAnnualReturnSinceInception 3.64%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 169% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 169.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund allocates its assets to a number of investment strategies (Strategies), through which the fund will take both physical and synthetic long positions and synthetic short exposures in a variety of equity and derivative instruments. The fund may hold significant synthetic long and short exposures. Each Strategy will be managed by a separate portfolio management team pursuant to allocations provided by the advisor from time to time. For long positions, the manager generally uses bottom-up fundamental analysis to identify companies throughout the world that the manager believes are undervalued or expects to experience high levels of growth. The manager also seeks to identify sectors, industries, or asset classes that may be overvalued or may experience low levels of growth, and the fund may take significant synthetic long and short exposures in such areas. The fund generally will not invest in companies with a market capitalization below $500 million at the time of purchase. The fund's synthetic short exposures will primarily be maintained in derivatives on exchange-traded pooled investment vehicles (e.g., exchange-traded funds (ETFs)) and/or indices, but may be maintained in other vehicles. In certain circumstances, the fund's overall synthetic short exposures may equal or exceed the size of the fund's long positions. Generally, the fund does not intend to take synthetic short exposures to individual stocks. The fund also may invest in master limited partnerships. The fund may trade securities actively.
Derivative instruments in which the fund may hold physical and synthetic long positions or synthetic short exposures include futures and forward contracts, such as interest-rate futures and foreign currency forward contracts; swaps, such as interest-rate swaps, credit default swaps, or total return swaps; call and put options; or warrants and rights, and may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns. The fund may also invest in repurchase agreements and reverse repurchase agreements.
The Strategies are typically diversified across sectors or focus on individual sectors, including financial services, healthcare, information technology, energy, biotechnology, and/or natural resources. Strategies and the allocations among them may vary. Each Strategy has a distinct investment philosophy and an analytical process based on a number of factors, such as business environment, management quality, balance sheet, income statement, anticipated earnings, expected growth rates, revenues, dividends, and other measures of value. As a result, the aggregate portfolio will represent a wide range of investment philosophies, companies, industries, and market capitalizations.
The manager may also invest in debt instruments, including high yield debt instruments (i.e., junk bonds). Such instruments may include, but are not limited to, bonds, bank loans (including loan participations), asset-backed securities, mortgage-backed securities, convertible securities, foreign currency-denominated foreign securities, U.S. and foreign government securities, hybrid securities (including convertible bonds, contingent convertible/capital securities, and similarly structured securities), derivatives, currencies, and reverse repurchase agreements. Some loans may be illiquid. Derivative instruments also may magnify the fund's gains and losses. The fund's derivative transactions will be fully collateralized.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Biotechnology industry risk. Biotechnology companies are subject to regulatory requirements, intense competition, rapid technological and other developments that could negatively affect the price, profitability, viability, and availability of their products and services. Investments in this industry are often based on speculation regarding future research and product developments.
Convertible securities risk. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. As the market price of underlying common stock declines below the conversion price, the market value of the convertible security tends to be increasingly influenced by its yield.
Credit and counterparty risk. The issuer or guarantor of a fixed-income security, the counterparty to an over-the-counter derivatives contract, or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk depending upon the nature of their support. A downgrade or default affecting any of the fund's securities could affect the fund's performance.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Energy sector risk. The energy sector is cyclical and highly dependent on commodities prices, which may be volatile. The market value of energy companies can be significantly affected by a number of factors, including global energy price volatility, supply and demand, exchange- and interest-rate fluctuation, and domestic and foreign political and economic developments. Energy companies also face a significant risk of civil liability.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Growth company securities may fluctuate more in price than other securities because of the greater emphasis on earnings expectations. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Financial services sector risk. Financial services companies can be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors.
Fixed-income securities risk. A rise in interest rates typically causes bond prices to fall. The longer the average maturity or duration of the bonds held by a fund, the more sensitive it will likely be to interest-rate fluctuations. An issuer may not make all interest payments or repay all or any of the principal borrowed. Changes in a security's credit quality may adversely affect fund performance.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets.
Hong Kong Stock Connect Program (Stock Connect) risk. China A-Shares listed and traded on certain Chinese stock exchanges through Stock Connect, a mutual market access program designed to, among other things, enable foreign investment in the People's Republic of China (PRC) via brokers in Hong Kong, are subject to a number of restrictions imposed by Chinese securities regulations and local exchange listing rules. Because Stock Connect was established in November 2014, developments are likely, which may restrict or otherwise affect the fund's investments or returns. Furthermore, any changes in laws, regulations and policies of the China A-Shares market or rules in relation to Stock Connect may affect China A-Share prices. These risks are heightened by the underdeveloped state of the PRC's investment and banking systems in general.
Healthcare sector risk. Health sciences companies may be significantly affected by product obsolescence, thin capitalization, limited product lines and markets, civil liability claims, and legislative or regulatory activities, among other factors.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: credit default swaps, foreign currency forward contracts, futures contracts, options, interest rate swaps, total return swaps, reverse repurchase agreements, and swaps. Foreign currency forward contracts, futures contracts, options, and swaps generally are subject to counterparty risk. In addition, swaps may be subject to interest-rate and settlement risk, and the risk of default of the underlying reference obligation. Derivatives associated with foreign currency transactions are subject to currency risk. An event of default or insolvency of the counterparty to a reverse repurchase agreement could result in delays or restrictions with respect to the fund's ability to dispose of the underlying securities. In addition, a reverse repurchase agreement may be considered a form of leverage and may, therefore, increase fluctuations in the fund's net asset value per share (NAV).
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Hybrid instrument risk. Hybrid instruments entail greater market risk and may be more volatile than traditional debt instruments, may bear interest or pay preferred dividends at below-market rates, and may be illiquid. The risks of investing in hybrid instruments are a combination of the risks of investing in securities, options, futures, and currencies.
Information technology risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Leveraging risk. Using derivatives may result in a leveraged portfolio. Leveraging long exposures increases a fund's losses when the value of its investments declines. Some derivatives have the potential for unlimited loss, regardless of the size of the initial investment.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments. Liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Widespread selling of fixed-income securities to satisfy redemptions during periods of reduced demand may adversely impact the price or salability of such securities. Periods of heavy redemption could cause the fund to sell assets at a loss or depressed value, which could negatively affect performance. Redemption risk is heightened during periods of declining or illiquid markets.
Loan participations risk. Participations and assignments involve special types of risks, including credit risk, interest-rate risk, counterparty risk, liquidity risk, risks associated with extended settlement, and the risks of being a lender.
Lower-rated and high-yield fixed-income securities risk. Lower-rated and high-yield fixed-income securities (junk bonds) are subject to greater credit quality risk, risk of default, and price volatility than higher-rated fixed-income securities, may be considered speculative, and can be difficult to resell.
Master limited partnership risk. MLPs generally reflect the risks associated with their underlying assets and with pooled investment vehicles. MLPs with credit-related holdings are subject to interest-rate risk and risk of default.
Mortgage-backed and asset-backed securities risk. Mortgage-backed and asset-backed securities are subject to different combinations of prepayment, extension, interest-rate, and other market risks.
Natural resources industry risk. The natural resources industry can be significantly affected by international political and economic developments, energy conservation and exploration efforts, commodity prices, and taxes and other governmental regulations, among other factors.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Synthetic short exposure risk. The fund will gain synthetic short exposure through a forward commitment through a swap agreement. Synthetic short exposures involve the risk that losses may be exaggerated, potentially losing more money than the actual cost of the investment.
Technology companies risk. Technology companies can be significantly affected by rapid obsolescence, short product cycles, competition, and government regulation, among other factors. Investments in the technology sector may be susceptible to heightened risk of cybersecurity breaches, which may allow an unauthorized party to gain access to personally identifiable information and other customer data.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q1 '17, 6.84%
Worst quarter: Q4 '18, -7.40%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | MSCI World Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.71%)
5 Years rr_AverageAnnualReturnYear05 4.56%
Since Inception rr_AverageAnnualReturnSinceInception 5.08%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 1.47%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.12%
Total annual fund operating expenses rr_ExpensesOverAssets 1.59%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [48]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.58%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 161
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 501
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 865
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,888
Annual Return 2014 rr_AnnualReturn2014 1.99%
Annual Return 2015 rr_AnnualReturn2015 8.14%
Annual Return 2016 rr_AnnualReturn2016 (4.58%)
Annual Return 2017 rr_AnnualReturn2017 15.97%
Annual Return 2018 rr_AnnualReturn2018 (4.11%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q1 '17, 6.84%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.84%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –7.40%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (7.40%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (4.11%)
5 Years rr_AverageAnnualReturnYear05 3.20%
Since Inception rr_AverageAnnualReturnSinceInception 3.28%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.84%)
5 Years rr_AverageAnnualReturnYear05 2.64%
Since Inception rr_AverageAnnualReturnSinceInception 2.72%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Seaport Long/Short Fund formerly John Hancock Seaport Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.91%)
5 Years rr_AverageAnnualReturnYear05 2.48%
Since Inception rr_AverageAnnualReturnSinceInception 2.54%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Small Cap Core Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 102% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 102.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal market conditions, the fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of small-capitalization companies. The fund considers small-capitalization companies to be those that, at the time of investment, are in the capitalization range of the Russell 2000 Index, with a maximum capitalization of $5 billion as of December 31, 2018. The fund generally will not invest in companies that, at the time of purchase, have market capitalizations of $5 billion or more. Equity securities include common and preferred stocks, rights, warrants, and depositary receipts.
The manager emphasizes a fundamental, bottom-up approach to individual stock selection, looking for companies with durable, niche business models with the potential for high returns on capital and that the manager believes are undervalued. Companies are screened based on a number of factors, including balance sheet quality, profitability, liquidity, size, and risk profile.
The fund intends to invest in a number of different sectors based on stock selection and sector weightings may vary significantly from its benchmark. The fund may focus its investments in a particular sector or sectors. The fund may invest up to 10% of its total assets in foreign securities including emerging-market securities and securities of non-U.S. companies traded on a U.S. exchange.
The fund may invest in initial public offerings (IPOs), real estate investment trusts (REITs) or other real estate-related equity securities, and certain exchange-traded funds (ETFs).
The fund normally will invest 10% or less of its total assets in cash and cash equivalents, including repurchase agreements, money market securities, U.S. government securities, and other short-term investments. The fund may invest in derivatives to a limited extent. Derivatives may be used to reduce risk and/or obtain efficient market exposure, and may include futures contracts and foreign currency forward contracts.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations. U.S. government securities are subject to varying degrees of credit risk based on the nature of their support.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities of the index it is designed to track. However, at times, an ETF's portfolio composition and performance may not match that of such index. A fund bears ETF fees and expenses indirectly.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. The risks of investing in foreign securities are magnified in emerging markets. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts and futures contracts. Foreign currency forward contracts and futures contracts generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
High portfolio turnover risk. Trading securities actively and frequently can increase transaction costs (thus lowering performance) and taxable distributions.
Initial public offerings risk. IPO share prices are frequently volatile and may significantly impact fund performance.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred stock risk. Preferred stock generally ranks senior to common stock with respect to dividends and liquidation but ranks junior to debt securities. Unlike interest payments on debt securities, preferred stock dividends are payable only if declared by the issuer's board of directors. Preferred stock may be subject to optional or mandatory redemption provisions.
Real estate investment trust risk. REITs, pooled investment vehicles that typically invest in real estate directly or in loans collateralized by real estate, carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Real estate securities risk. Securities of companies in the real estate industry carry risks associated with owning real estate, including the potential for a decline in value due to economic or market conditions.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q3 '16, 10.68%
Worst quarter: Q4 '18, -19.52%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rate in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual returns compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Small Cap Core Fund) | Russell 2000 Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (11.01%)
5 Years rr_AverageAnnualReturnYear05 4.41%
Since Inception rr_AverageAnnualReturnSinceInception 5.09%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Small Cap Core Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.86%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.14% [49]
Total annual fund operating expenses rr_ExpensesOverAssets 1.00%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [55]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.99%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 317
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 551
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,224
Annual Return 2014 rr_AnnualReturn2014 (0.80%)
Annual Return 2015 rr_AnnualReturn2015 (1.21%)
Annual Return 2016 rr_AnnualReturn2016 27.18%
Annual Return 2017 rr_AnnualReturn2017 16.25%
Annual Return 2018 rr_AnnualReturn2018 (18.18%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q3 '16, 10.68%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 10.68%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2016
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –19.52%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.52%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (18.18%)
5 Years rr_AverageAnnualReturnYear05 3.46%
Since Inception rr_AverageAnnualReturnSinceInception 3.87%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Small Cap Core Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (19.25%)
5 Years rr_AverageAnnualReturnYear05 2.14%
Since Inception rr_AverageAnnualReturnSinceInception 2.55%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Small Cap Core Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (10.04%)
5 Years rr_AverageAnnualReturnYear05 2.45%
Since Inception rr_AverageAnnualReturnSinceInception 2.77%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2013
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Value Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek capital appreciation over the long term.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES </b></div>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder fees (%) (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)</b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2020
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> EXPENSE EXAMPLE </b></div>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment for the time periods indicated and then assuming you sell all of your shares at the end of those periods. The example assumes a 5% average annual return and that fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PORTFOLIO TURNOVER </b></div>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During its most recent fiscal year, the fund's portfolio turnover rate was 32% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 32.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, the fund invests at least 80% of its net assets in the equity securities of large and medium capitalization companies. The fund considers "large and medium capitalization companies" to be those with market capitalizations within the range of the market capitalizations in the Russell 1000 Index, $364.6 million to $780.1 billion as of December 31, 2018. The fund may invest in securities of companies with any market capitalization. Equity securities include common and preferred stock and their equivalents, such as depositary receipts, rights and warrants.
The fund invests primarily in common stocks of value-oriented companies, which generally have, among other characteristics, lower price-to-book ratios, lower forecasted growth values, and higher dividend yields relative to the broader market. The fund may invest up to 15% of its total assets in American Depositary receipts (ADRs), receipts issued by a U.S. bank or trust company evidencing ownership of securities issued by a foreign corporation. The fund also may invest in certain types of exchange-traded derivative instruments in order to "equitize" cash balances by gaining exposure to relevant equity markets. The fund may invest in futures and foreign currency forward contracts to reduce risk, obtain efficient market exposure, and/or enhance investment returns.
The manager selects stocks of companies that it believes are undervalued relative to their industry, market, or sector. In its selection process, the manager may consider factors such as price-to-book ratio, price-to-earnings ratio, dividend yield, projected earnings growth, and profitability. The fund may focus its investments in a particular sector or sectors of the economy.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money. The fund's investment strategy may not produce the intended results.
During periods of heightened market volatility or reduced liquidity, governments, their agencies, or other regulatory bodies, both within the United States and abroad, may take steps to intervene. These actions, which could include legislative, regulatory, or economic initiatives, might have unforeseeable consequences and could adversely affect the fund's performance or otherwise constrain the fund's ability to achieve its investment objective.
The fund's main risks are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 51 of the prospectus.
Credit and counterparty risk. The counterparty to an over-the-counter derivatives contract or a borrower of fund securities may not make timely payments or otherwise honor its obligations.
Cybersecurity and operational risk. Cybersecurity breaches may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause a fund or its service providers to suffer data corruption or lose operational functionality. Similar incidents affecting issuers of a fund's securities may negatively impact performance. Operational risk may arise from human error, error by third parties, communication errors, or technology failures, among other causes.
Economic and market events risk. Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility, which could negatively impact performance. Reduced liquidity in credit and fixed-income markets could adversely affect issuers worldwide. Banks and financial services companies could suffer losses if interest rates rise or economic conditions deteriorate.
Equity securities risk. The price of equity securities may decline due to changes in a company's financial condition or overall market conditions. Securities the manager believes are undervalued may never realize their full potential value, and in certain markets value stocks may underperform the market as a whole.
Foreign securities risk. Less information may be publicly available regarding foreign issuers. Foreign securities may be subject to foreign taxes and may be more volatile than U.S. securities. Currency fluctuations and political and economic developments may adversely impact the value of foreign securities. Depositary receipts are subject to most of the risks associated with investing in foreign securities directly because the value of a depositary receipt is dependent upon the market price of the underlying foreign equity security. Depositary receipts are also subject to liquidity risk.
Hedging, derivatives, and other strategic transactions risk. Hedging, derivatives, and other strategic transactions may increase a fund's volatility and could produce disproportionate losses, potentially more than the fund's principal investment. Risks of these transactions are different from and possibly greater than risks of investing directly in securities and other traditional instruments. Under certain market conditions, derivatives could become harder to value or sell and may become subject to liquidity risk (i.e., the inability to enter into closing transactions). Regulatory changes in derivative markets could impact the cost of or the fund's ability to engage in derivative transactions. Derivatives and other strategic transactions that the fund intends to utilize include: foreign currency forward contracts and futures contracts. Foreign currency forward contracts and futures contracts generally are subject to counterparty risk. Derivatives associated with foreign currency transactions are subject to currency risk.
Large company risk. Larger companies may grow more slowly than smaller companies or be slower to respond to business developments. Large-capitalization securities may underperform the market as a whole.
Liquidity risk. The extent (if at all) to which a security may be sold or a derivative position closed without negatively impacting its market value may be impaired by reduced market activity or participation, legal restrictions, or other economic and market impediments.
Preferred and convertible securities risk. Preferred stock dividends are payable only if declared by the issuer's board. Preferred stock may be subject to redemption provisions. The market values of convertible securities tend to fall as interest rates rise and rise as interest rates fall. Convertible preferred stock's value can depend heavily upon the underlying common stock's value.
Sector risk. When a fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the fund were invested more evenly across sectors. To the extent that a fund invests in securities of companies in the financial services sector, the fund may be significantly affected by economic, market, and business developments, borrowing costs, interest-rate fluctuations, competition, and government regulation, among other factors, impacting that sector.
Small and mid-sized company risk. Small and mid-sized companies are generally less established and may be more volatile than larger companies. Small and/or mid-capitalization securities may underperform the market as a whole.
Value investment risk. Value stocks may underperform the market as a whole, which may cause value-oriented funds to underperform equity funds with other investment strategies. Securities the manager believes are undervalued may never perform as expected.
Warrants risk. The prices of warrants may not precisely reflect the prices of their underlying securities. Warrant holders do not receive dividends or have voting or credit rights. A warrant ceases to have value if not exercised prior to its expiration date.
Risk Lose Money [Text] rr_RiskLoseMoney Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> PAST PERFORMANCE </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year compared with a broad-based market index. Past performance (before and after taxes) does not indicate future results. All figures assume dividend reinvestment. Performance information is updated daily, monthly, and quarterly and may be obtained at our website, jhinvestments.com, or by calling 800-344-1029 between 8:00 A.M. and 7:00 P.M., Eastern time, on most business days.
Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns (%)—Class NAV</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: Q4 '16, 8.42%
Worst quarter: Q4 '18, -14.53%
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Average annual total returns (%)—as of 12/31/18 </b></div>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate Please note that after-tax returns reflect the highest individual federal marginal income-tax rates in effect as of the date provided and do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information illustrates the variability of the fund's returns and provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year compared with a broad-based market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-344-1029
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Value Equity Fund) | Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.27%)
Since Inception rr_AverageAnnualReturnSinceInception 4.74%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Value Equity Fund) | Class NAV  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge Over Other rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge Over Other rr_MaximumDeferredSalesChargeOverOther none
Management fee rr_ManagementFeesOverAssets 0.78%
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.07%
Total annual fund operating expenses rr_ExpensesOverAssets 0.85%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [56]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.70%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 72
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 256
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 457
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,035
Annual Return 2015 rr_AnnualReturn2015 (0.86%)
Annual Return 2016 rr_AnnualReturn2016 13.56%
Annual Return 2017 rr_AnnualReturn2017 17.62%
Annual Return 2018 rr_AnnualReturn2018 (10.93%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: Q4 '16, 8.42%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.42%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: Q4 '18, –14.53%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.53%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (10.93%)
Since Inception rr_AverageAnnualReturnSinceInception 4.44%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Value Equity Fund) | Class NAV | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (12.90%)
Since Inception rr_AverageAnnualReturnSinceInception 3.10%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
(John Hancock Equity and Alternative-Specialty Funds - Class NAV) | (John Hancock Value Equity Fund) | Class NAV | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (5.42%)
Since Inception rr_AverageAnnualReturnSinceInception 3.10%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 26, 2014
[1] (on certain purchases, including those of $1 million or more)
[2] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[3] "Service plan fee" has been restated to reflect maximum allowable fees.
[4] The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.
[5] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund, in an amount equal to the amount by which expenses of the fund exceed 0.88% of average daily net assets of the fund, and expenses of Class I and Class R6 shares exceed 0.98% and 0.88%, respectively, of average daily net assets attributable to the class. For purposes of these agreements, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense and "expenses of Class I and Class R6 shares" means expenses of the fund plus class-specific expenses. Each agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[6] "Service plan fee" has been restated to reflect maximum allowable fees.
[7] The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.
[8] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[9] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R5 shares.
[10] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.88% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[11] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[12] "Service plan fee" has been restated to reflect maximum allowable fees.
[13] The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.
[14] "Management fee" has been restated to reflect the contractual management fee schedule effective March 1, 2018.
[15] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to Class A, Class C, Class I, and Class R6 shares, in an amount equal to the amount by which the expenses of Class A, Class C, Class I, and Class R6 shares, as applicable, exceed 1.31%, 2.01%, 1.00%, and 0.92%, respectively, of the average daily net assets attributable to the class. For purposes of this agreement, "expenses of Class A, Class C, Class I, and Class R6 shares" means all expenses of the applicable class (including fund expenses attributable to the class), excluding (a) taxes, (b) portfolio brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) acquired fund fees and expenses paid indirectly, (f) borrowing costs, (g) prime brokerage fees, and (h) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[16] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[17] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.81% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[18] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
[19] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.81% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[20] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[21] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.91% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[22] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
[23] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.91% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[24] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class C shares.
[25] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.91% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[26] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[27] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.81% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[28] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
[29] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.81% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[30] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[31] "Service plan fee" has been restated to reflect maximum allowable fees.
[32] The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.
[33] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[34] "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
[35] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 1.62% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[36] The "Total annual fund operating expenses after expense reimbursements" shown may not correlate to the fund's ratios of expenses to average daily net assets shown in the "Financial highlights" section of the fund's prospectus, which does not include "Acquired fund fees and expenses."
[37] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2 and Class R4 shares.
[38] "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
[39] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 1.62% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[40] The "Total annual fund operating expenses after expense reimbursements" shown may not correlate to the fund's ratios of expenses to average daily net assets shown in the "Financial highlights" section of the fund's prospectus, which does not include "Acquired fund fees and expenses."
[41] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[42] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[43] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[44] The advisor contractually agrees to limit its management fee to a maximum rate of 0.66% of the fund's average daily net assets. The advisor also contractually agrees to reduce its management fee for the fund, or if necessary make payment to the fund, in an amount equal to the amount by which expenses of the fund exceed 0.04% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) advisory fees, (f) class-specific expenses, (g) borrowing costs, (h) prime brokerage fees, (i) acquired fund fees and expenses paid indirectly, and (j) short dividend expense. Each of the agreements expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[45] "Other expenses," such as expected transfer agency expenses, have been estimated for the first year of operations of the fund's Class R2, Class R4, and Class R5 shares.
[46] The advisor contractually agrees to limit its management fee to a maximum rate of 0.66% of the fund's average daily net assets. The advisor also contractually agrees to reduce its management fee for the fund, or if necessary make payment to the fund, in an amount equal to the amount by which expenses of the fund exceed 0.04% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) advisory fees, (f) class-specific expenses, (g) borrowing costs, (h) prime brokerage fees, (i) acquired fund fees and expenses paid indirectly, and (j) short dividend expense. Each of the agreements expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[47] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 0.88% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[48] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[49] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
[50] "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
[51] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund in an amount equal to the amount by which expenses of the fund exceed 1.62% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the advisor and the fund based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[52] The "Total annual fund operating expenses after expense reimbursements" shown may not correlate to the fund's ratios of expenses to average daily net assets shown in the "Financial highlights" section of the fund's prospectus, which does not include "Acquired fund fees and expenses."
[53] "Management fee" has been restated to reflect the contractual management fee schedule effective March 1, 2018.
[54] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to Class NAV shares, in an amount equal to the amount by which the expenses of Class NAV shares exceed 0.92% of the average daily net assets attributable to the class. For purposes of this agreement, "expenses of Class NAV shares" means all expenses of the class (including fund expenses attributable to the class), excluding (a) taxes; (b) portfolio brokerage commissions; (c) interest expense; (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business; (e) acquired fund fees and expenses paid indirectly; (f) borrowing costs; (g) prime brokerage fees; and (h) short dividend expense. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[55] The advisor contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
[56] The advisor contractually agrees to limit its management fee to a maximum rate of 0.66% of the fund's average daily net assets. The advisor also contractually agrees to reduce its management fee for the fund, or if necessary make payment to the fund, in an amount equal to the amount by which expenses of the fund exceed 0.04% of average daily net assets of the fund. For purposes of this agreement, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) advisory fees, (f) class-specific expenses, (g) borrowing costs, (h) prime brokerage fees, (i) acquired fund fees and expenses paid indirectly, and (j) short dividend expense. Each of the agreements expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.