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(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading Investment objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
To seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. 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 contingent deferred sales charge (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 professional and on pages 24 to 26 of the prospectus under “Sales charge reductions and waivers” or pages 123 to 127 of the fund’s Statement of Additional Information under “Sales Charges on Class A 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 Shareholder fees (%) (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination July 31, 2024
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The “Total annual fund operating expenses” 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 Expense example
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 Sold
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Not Sold
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
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 27% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 27.00%
Strategy [Heading] rr_StrategyHeading Principal investment strategies
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.
The manager considers environmental, social, and/or governance (ESG) factors, alongside other relevant factors, as part of its investment process. ESG factors may include, but are not limited to, matters regarding board diversity, climate change policies, and supply chain and human rights policies. The ESG characteristics utilized in the fund’s investment process may change over time and one or more characteristics may not be relevant with respect to all issuers that are eligible fund investments.
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 Principal risks
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.
The fund’s main risks are listed below in alphabetical order, not in order of importance. 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.
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 may generally represent a relatively large portion of the Greater China market as a whole.
 
Hong Kong Stock Connect Program (Stock Connect) risk. Trading in China A-Shares through Stock Connect, a mutual market access program that enables foreign investment in the People’s Republic of China (PRC), is subject to certain restrictions and risks. Securities listed on Stock Connect may lose purchase eligibility, which could adversely affect the fund’s performance. Trading through Stock Connect is subject to trading, clearance, and settlement procedures that may continue to develop as the program matures. Any changes in laws, regulations and policies applicable 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.
ESG integration risk. The manager considers ESG factors that it deems relevant or additive, along with other material factors and analysis, when managing the fund. ESG factors may include, but are not limited to, matters regarding board diversity, climate change policies, and supply chain and human rights policies. The manager may consider these ESG factors on all or a meaningful portion of the fund’s investments. Incorporating ESG criteria and making investment decisions based on certain ESG characteristics, as determined by the manager, carries the risk that the fund may perform differently, including underperforming, funds that do not utilize ESG criteria, or funds that utilize different ESG criteria.
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, including foreign government 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. If applicable, 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). 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.
Information technology companies risk. Information technology companies can be significantly affected by rapid obsolescence, short product cycles, competition from new market entrants, and heightened cybersecurity risk, among other factors.
Investment company securities risk. The fund may invest in securities of other investment companies. Fund shareholders indirectly bear their proportionate share of the expenses of each such investment company. The total return on such investments will be reduced by the operating expenses and fees of such other investment companies, including advisory fees.
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.
Operational and cybersecurity 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.
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 Past performance
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.
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 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.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress jhinvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not indicate future results.
Bar Chart [Heading] rr_BarChartHeading Calendar year total returns (%)—Class A (sales charges are not reflected in the bar chart and returns would have been lower if they were)
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
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 Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Please note that after-tax returns (shown for Class A shares only)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter: 2020, Q2, 28.31%
Worst quarter: 2020, Q1, -22.94%
Performance Table Heading rr_PerformanceTableHeading Average annual total returns (%)—as of 12/31/22
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | MSCI Emerging Markets Index (reflects no deduction for fees, expenses, or taxes, except foreign withholding taxes on dividends)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (20.09%)
5 Years rr_AverageAnnualReturnYear05 (1.40%)
Since inception rr_AverageAnnualReturnSinceInception 2.25%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage) rr_MaximumCumulativeSalesChargeOverOther 5.00%
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther 1.00%
Shareholder Fee, Other rr_ShareholderFeeOther $ 20
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.93%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.20%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.44% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.28%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 624
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 918
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,233
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,125
Annual Return 2016 rr_AnnualReturn2016 2.53%
Annual Return 2017 rr_AnnualReturn2017 41.57%
Annual Return 2018 rr_AnnualReturn2018 (17.18%)
Annual Return 2019 rr_AnnualReturn2019 26.06%
Annual Return 2020 rr_AnnualReturn2020 32.37%
Annual Return 2021 rr_AnnualReturn2021 (7.74%)
Annual Return 2022 rr_AnnualReturn2022 (27.56%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter: 2020, Q2, 28.31%
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 28.31%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter: 2020, Q1, -22.94%
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (22.94%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
1 Year rr_AverageAnnualReturnYear01 (31.17%)
5 Years rr_AverageAnnualReturnYear05 (2.58%)
Since inception rr_AverageAnnualReturnSinceInception 1.04%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class A | after tax on distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (31.13%)
5 Years rr_AverageAnnualReturnYear05 (3.57%)
Since inception rr_AverageAnnualReturnSinceInception 0.34%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class A | after tax on distributions, with sale  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (18.17%)
5 Years rr_AverageAnnualReturnYear05 (1.67%)
Since inception rr_AverageAnnualReturnSinceInception 1.02%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage) rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther 1.00%
Shareholder Fee, Other rr_ShareholderFeeOther $ 20
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.93%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.20%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.14% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.98%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 301
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 655
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,135
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,282
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 201
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 655
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,135
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,282
1 Year rr_AverageAnnualReturnYear01 (28.77%)
5 Years rr_AverageAnnualReturnYear05 (2.25%)
Since inception rr_AverageAnnualReturnSinceInception 1.03%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage) rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.93%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.20%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.14% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.98%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 100
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 346
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 612
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,372
1 Year rr_AverageAnnualReturnYear01 (27.34%)
5 Years rr_AverageAnnualReturnYear05 (1.27%)
Since inception rr_AverageAnnualReturnSinceInception 2.02%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage) rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.93%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.25% [4]
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.34%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.53% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.37%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 139
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 468
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 819
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,810
1 Year rr_AverageAnnualReturnYear01 (27.65%)
5 Years rr_AverageAnnualReturnYear05 (1.51%)
Since inception rr_AverageAnnualReturnSinceInception 1.80%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage) rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.93%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10% [4]
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.19%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.38% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.26%) [3],[5]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.12%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 114
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 411
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 730
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,635
1 Year rr_AverageAnnualReturnYear01 (27.42%)
5 Years rr_AverageAnnualReturnYear05 (1.34%)
Since inception rr_AverageAnnualReturnSinceInception 1.96%
(John Hancock Emerging Markets Equity Fund - Classes A, C, I, R2, R4 and R6) | (Emerging Markets Equity Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage) rr_MaximumCumulativeSalesChargeOverOther none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.93%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets none
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.09%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.09%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.03% [2]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.87%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 89
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 312
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 553
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,245
1 Year rr_AverageAnnualReturnYear01 (27.26%)
5 Years rr_AverageAnnualReturnYear05 (1.16%)
Since inception rr_AverageAnnualReturnSinceInception 2.14%
[1]
2 "Acquired fund fees and expenses" are based on indirect net expenses associated with the fund's investments in underlying investment companies.
[2]
3 The “Total annual fund operating expenses” 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."
[3]
4 The advisor contractually agrees to reduce its management fee by an annual rate of 0.15% of the fund’s average daily net assets. This agreement expires on February 28, 2024, 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, including the fund (the participating portfolios). This waiver equals, on an annualized basis, 0.0100% of that portion of the aggregate net assets of all the participating portfolios that exceeds $75 billion but is less than or equal to $125 billion; 0.0125% of that portion of the aggregate net assets of all the participating portfolios that exceeds $125 billion but is less than or equal to $150 billion; 0.0150% of that portion of the aggregate net assets of all the participating portfolios that exceeds $150 billion but is less than or equal to $175 billion; 0.0175% of that portion of the aggregate net assets of all the participating portfolios that exceeds $175 billion but is less than or equal to $200 billion; 0.0200% of that portion of the aggregate net assets of all the participating portfolios that exceeds $200 billion but is less than or equal to $225 billion; and 0.0225% of that portion of the aggregate net assets of all the participating portfolios that exceeds $225 billion. The amount of the reimbursement is calculated daily and allocated among all the participating portfolios in proportion to the daily net assets of each participating portfolio. 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 July 31, 2024, 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.
[4]
1 “Service plan fee” has been restated to reflect maximum allowable fees.
[5]
5 The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 28, 2024 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.