XML 14 R19.htm IDEA: XBRL DOCUMENT v3.6.0.2
Label Element Value
(John Hancock ESG International Equity Fund - Classes A, I and R6) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

To seek long-term capital appreciation.
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 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. More information about these and other discounts is available from your financial representative and on pages 12 to 13 of this prospectus under "Sales charge reductions and waivers" or pages 82 to 85 of the fund's Statement of Additional Information under "Initial sales charge on Class A 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 February 28, 2018
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses" have been estimated for the fund's first year of operations.
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 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

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. Because the fund had not commenced operations as of the date of the prospectus, there is no portfolio turnover to report.
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 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

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.

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 4 of the prospectus.

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.

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.
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

This section normally shows how the fund's total returns have varied from year to year, along with a broad-based market index for reference. Because the fund had not commenced operations as of the date of this prospectus, there is no past performance to report.
(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 0.62% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.72%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [3]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.28%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 624
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 974
(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 0.61% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.46%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [3]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 104
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 418
(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 0.52% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.37%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [3]
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 $ 390
(John Hancock ESG International Equity Fund - Class C) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

To seek long-term capital appreciation.
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 and hold shares of the fund.

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 February 28, 2018
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses" have been estimated for the fund's first year of operations.
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. Because the fund had not commenced operations as of the date of the prospectus, there is no portfolio turnover to report.
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 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

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.

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 4 of the prospectus.

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.

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.
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

This section normally shows how the fund's total returns have varied from year to year, along with a broad-based market index for reference. Because the fund had not commenced operations as of the date of this prospectus, there is no past performance to report.
(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 0.62% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 2.47%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [4]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 2.03%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 306
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 728
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 206
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 $ 728
(John Hancock ESG International Equity Fund - Class NAV) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

To seek long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading

FEES AND EXPENSES
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay indirectly if shares of the fund are held by a fund of funds of which you are a shareholder or 529 plan in which you are a participant. They are based on expenses incurred during the fund's most recent fiscal year expressed as a percentage of the fund's average net assets during the year.
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 February 28, 2018
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses" have been estimated for the fund's first year of operations.
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 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

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. Because the fund had not commenced operations as of the date of the prospectus, there is no portfolio turnover to report.
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 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

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.

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 4 of the prospectus.

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.

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.
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

This section normally shows how the fund's total returns have varied from year to year, along with a broad-based market index for reference. Because the fund had not commenced operations as of the date of this prospectus, there is no past performance to report.
(John Hancock ESG International Equity Fund - 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 0.50% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.35%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [4]
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 $ 384
(John Hancock ESG International Equity Fund - Class R2 and R4) | (John Hancock ESG International Equity Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

To seek long-term capital appreciation.
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 and hold shares of the fund.
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 February 28, 2018
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates "Other expenses" have been estimated for the fund's first year of operations.
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 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

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. Because the fund had not commenced operations as of the date of the prospectus, there is no portfolio turnover to report.
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 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

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.

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 4 of the prospectus.

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.

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.
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

This section normally shows how the fund's total returns have varied from year to year, along with a broad-based market index for reference. Because the fund had not commenced operations as of the date of this prospectus, there is no past performance to report.
(John Hancock ESG International Equity Fund - Class 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
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 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25% [2]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.52% [2]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.77% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.87%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [4]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.43%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 146
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 545
(John Hancock ESG International Equity Fund - Class 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
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 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10% [2]
Additional other expenses rr_Component2OtherExpensesOverAssets 0.52% [2]
Other Expenses Over Assets rr_OtherExpensesOverAssets 0.62% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.72%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.44%) [4]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.28%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 130
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 499
[1] (on certain purchases, including those of $1 million or more)
[2] "Other expenses" have been estimated for the fund's first year of operations.
[3] 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 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) acquired fund fees and expenses paid indirectly, (g) borrowing costs, (h) prime brokerage fees, and (i) short dividend expense. This agreement expires on February 28, 2018, 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] 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 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) acquired fund fees and expenses paid indirectly, (g) borrowing costs, (h) prime brokerage fees, and (i) short dividend expense. This agreement expires on February 28, 2018, 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.