rr_ObjectiveHeading

Investment objective

rr_ExpenseHeading

Fees and expenses

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 $100,000 in the John Hancock family of funds.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (%) (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

September 30, 2016

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense example

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Sold

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

95.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund may use an extensive range of investment strategies and invest in a wide spectrum of fixed-income, debt, and money market securities, as well as derivative instruments, in pursuing its investment objective.

The fund may invest in fixed-income, debt, and money market securities of companies and government and supranational entities around the world, including in emerging markets. The fund is not subject to any maturity, market capitalization or credit quality restrictions and may invest in high-yield below-investment-grade bonds (junk bonds) without limitation. The fund may invest significantly in particular economic sectors.

The fund also may invest in money market funds. 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 invests extensively in derivative instruments, which may relate to fixed-income and debt securities, interest rates, total return rates, currencies or currency exchange rates, or indexes. Derivatives, including futures, options, swaps (including credit default and variance swaps), and foreign currency forward contracts, may be used both for investment and hedging purposes and to take long and short positions in markets, currencies, securities, and groups of securities.

The manager seeks to maximize risk-adjusted absolute return by using multiple strategies across listed fixed-income and debt securities, currencies, derivatives, or other instruments as part of a diversified global portfolio. These strategies include exploiting market cyclicality and a diverse array of inefficiencies across and within global markets. 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. The fund also may hold cash or invest its cash balances in cash equivalents and short-term investments, including money market funds.

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 subadvisor 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 6 of the prospectus.

Changing distribution levels risk. The fund may cease or reduce the level of its distribution if income or dividends paid from its investments declines.

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.

Currency risk. Fluctuations in exchange rates may adversely affect the U.S. dollar value of a fund's investments. Foreign currencies may decline in value, which could negatively impact performance.

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 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. The conclusion of the U.S. Federal Reserve's quantitative easing stimulus program and/or increases in short-term interest rates could cause high volatility in fixed-income markets to continue. 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.

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.

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, along with specific additional associated risks, if any, include: credit default swaps; 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.

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. An impairment of a fund's ability to sell securities or close derivative positions at advantageous prices exposes the fund to liquidity risk. Liquidity risk may result from 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.

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-size company risk. Small and mid-size companies are generally less established and may be more volatile than larger companies. Small capitalization securities may underperform the market as a whole.

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.

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. The Bank of America Merrill Lynch U.S. Dollar 1 Month LIBID Average Index shows 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, Monday to Thursday, 8:00 A.M.—7:00 P.M., and Friday, 8:00 A.M.—6:00 P.M., Eastern time (Class A and Class C shares), or 888-972-8696 between 8:30 A.M. and 5:00 P.M., Eastern time, on most business days (Class I and Class R6 shares).

A note on performance

Class A shares commenced operations on July 16, 2013. Class C shares commenced operations on June 27, 2014. Returns shown prior to the commencement date of Class C shares are those of Class A shares, except that they do not include Class A shares' 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 (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 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 Heading

rr_PerformanceTableHeading

Average annual total returns (%)—as of 12/31/14

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shares held in an IRA, 401(k), or other tax-advantaged investment plan.

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

1 Year

rr_AverageAnnualReturnYear01

1.69%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

0.08%

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

3.00%

Small account fee (for fund account balances under $1,000) $

rr_ShareholderFeeOther

$ 20

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.30%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.56%

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.50%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

772

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,096

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 0.31%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.00%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter: Q4 '14, –1.18%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2014

Since Inception

rr_AverageAnnualReturnSinceInception

(2.06%)

1 Year

rr_AverageAnnualReturnYear01

(4.39%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

(1.88%)

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Small account fee (for fund account balances under $1,000) $

rr_ShareholderFeeOther

$ 20

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.26%

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

2.25%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

705

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,594

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

705

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,594

Since Inception

rr_AverageAnnualReturnSinceInception

(0.30%)

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Small account fee (for fund account balances under $1,000) $

rr_ShareholderFeeOther

none

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Total annual fund operating expenses

rr_ExpensesOverAssets

1.25%

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.19%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

391

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,506

Since Inception

rr_AverageAnnualReturnSinceInception

0.26%

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Small account fee (for fund account balances under $1,000) $

rr_ShareholderFeeOther

none

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Total annual fund operating expenses

rr_ExpensesOverAssets

1.15%

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.13%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

363

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,396

Since Inception

rr_AverageAnnualReturnSinceInception

0.38%

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

"Other expenses" have been estimated for the first year of operations of the fund's Class R1, Class R2, Class R3, Class R4, and Class R5 shares.

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 of 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 [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.

Strategy [Heading]

rr_StrategyHeading

Principal investment strategies

Risk [Heading]

rr_RiskHeading

Principal risks

Risk Lose Money [Text]

rr_RiskLoseMoney

Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Past performance

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns (%)—Class R1

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 0.31%.

Best quarter: Q1 '14, 1.00%

Worst quarter: Q4 '14, –1.18%

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

Please note that after-tax returns (shown for Class R1 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 Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) does not indicate future results.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

Please note that after-tax returns (shown for Class R1 shares only)

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

888-972-8696

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

1.66%

1 Year

rr_AverageAnnualReturnYear01

0.08%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge Over Other

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.30%

^[4]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.90%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

597

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,222

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 0.31%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.00%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter: Q4 '14, –1.18%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2014

Since Inception

rr_AverageAnnualReturnSinceInception

none

1 Year

rr_AverageAnnualReturnYear01

(1.43%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

(0.32%)

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.85%

Service plan fee

rr_Component1OtherExpensesOverAssets

0.25%

^[4]

Other Expenses Over Assets

rr_OtherExpensesOverAssets

0.55%

^[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 168

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

897

1 Year

rr_AverageAnnualReturnYear01

(0.39%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge Over Other

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.30%

^[4]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.80%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

566

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,116

Since Inception

rr_AverageAnnualReturnSinceInception

none

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.85%

Service plan fee

rr_Component1OtherExpensesOverAssets

0.10%

^[4]

Other Expenses Over Assets

rr_OtherExpensesOverAssets

0.40%

^[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 153

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

818

1 Year

rr_AverageAnnualReturnYear01

(0.39%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge Over Other

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.30%

^[4]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.20%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

381

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,455

Since Inception

rr_AverageAnnualReturnSinceInception

none

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

"Other expenses" have been estimated for the first year of operations of the fund's Class 1 shares.

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 of 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 [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.

Strategy [Heading]

rr_StrategyHeading

Principal investment strategies

Risk [Heading]

rr_RiskHeading

Principal risks

Risk Lose Money [Text]

rr_RiskLoseMoney

Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Past performance

Bar Chart [Heading]

rr_BarChartHeading

Calendar year total returns (%)—Class 1

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 0.31%.

Best quarter: Q1 '14, 1.00%

Worst quarter: Q4 '14, –1.18%

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 Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) does not indicate future results.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

jhinvestments.com

1 Year

rr_AverageAnnualReturnYear01

1.69%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

0.08%

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.85%

Other Expenses Over Assets

rr_OtherExpensesOverAssets

0.28%

^[5]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 120

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

649

Annual Return 2014

rr_AnnualReturn2014

(0.39%)

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.31%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter: Q1 '14, 1.00%

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2014

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(1.18%)

1 Year

rr_AverageAnnualReturnYear01

(0.39%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

(0.71%)

1 Year

rr_AverageAnnualReturnYear01

(0.23%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 16, 2013

Prospectus:

rr_ProspectusTable

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

To seek to maximize total return consisting of current income and capital appreciation.

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 $100,000 in the John Hancock family of funds. More information about these and other discounts is available from your financial representative and on pages 18 to 19 of the prospectus under "Sales charge reductions and waivers" or pages 132 to 136 of the fund's Statement of Additional Information under "Initial sales charge on Class A shares."

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

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)

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense example

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

62.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in bonds. These bonds may include investment-grade and below-investment-grade (junk) bonds issued by U.S. and foreign corporations and U.S. and foreign governments and their agencies and instrumentalities. Under normal circumstances, the fund will invest at least 40% of its net assets in foreign securities, including those of issuers in emerging markets. The fund may also invest in preferred securities and other types of debt securities.

The manager uses a fundamental approach to security selection across all sectors of the bond market. Credit sectors in which the fund typically invests include U.S. government obligations, mortgage- and asset-backed securities, exchange-traded funds (ETFs), bank loans, investment-grade and below-investment-grade sovereign debt, and investment- and below-investment-grade U.S. and foreign corporate debt, including floating-rate loans. The fund seeks income stability during periods of credit expansion or contraction. Regional, country, and currency allocation will be dynamic over time in response to market conditions.

The fund may invest up and down an issuer's capital structure (excluding common equity) and across the credit quality spectrum, except that the fund may not invest more than 10% of its total assets in junk bonds rated as low as D (in default) by Standard & Poor's Ratings Services (S&P), Moody's Investors Service, Inc. (Moody's), Fitch Ratings, Inc. (Fitch), or an equivalent nationally recognized statistical rating organization (NRSRO) (and their unrated equivalents). The fund's investment policies are based on credit ratings at the time of purchase. The fund will not be managed to correspond to a market benchmark.

The manager will tactically manage duration, which will typically be less than three years. The value of an investment held by a fixed-income fund with a duration of three years, for example, decreases by approximately 3% for every 1% increase in interest rates and increases by approximately 3% with every 1% decrease in interest rates.

The fund may invest in derivatives and actively manage currency to mitigate risk, enhance returns, and diversify its portfolio. Derivatives may include exchange-traded futures and options, currency forwards and options, and over-the-counter (OTC) transactions (e.g., credit default swaps (CDS) and interest-rate swaps). The fund may also utilize derivatives on the Chicago Board Options Exchange Market Volatility Index (VIX) or CDS Indexes (CDX), or on longer-term U.S. Treasury futures. The manager may hedge, cross-hedge, and proxy hedge currency exposures, as well as take outright naked long positions through currency derivatives. The fund may invest in long CDS exposure (selling protection) to augment income opportunities in select credits where the mandated term structure could not otherwise be attained, consistent with the fund's goal of delivering current income.

Although the fund's strategies are typically not leverage-based, certain derivative holdings in the portfolio may provide the economic equivalent of leverage because they display heightened price sensitivity to market fluctuations.

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.

Changing distribution levels risk. The fund may cease or reduce the level of its distribution if income or dividends paid from its investments declines.

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.

Currency risk. Fluctuations in exchange rates may adversely affect the U.S. dollar value of a fund's investments. Foreign currencies may decline in value, which could negatively impact performance.

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.

Defaulted debt risk. Investing in defaulted debt securities is speculative and involves substantial risks in addition to those of non-defaulted high-yield securities. Defaulted debt securities generally do not generate interest payments. Principal on defaulted debt might not be repaid, and a fund could lose up to its entire investment.

Economic and market events risk. Events in the U.S. and global financial markets 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. The conclusion of the U.S. Federal Reserve's quantitative easing stimulus program and/or increases in short-term interest rates could cause high volatility in fixed-income markets to continue. 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.

Exchange-traded funds risk. An ETF generally reflects the risks of the underlying securities it is designed to track. A fund bears ETF fees and expenses indirectly.

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.

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, along with specific additional associated risks, if any, include: credit default swaps; currency options; foreign currency forward contracts; foreign currency swaps; futures contracts; interest-rate swaps; and options. 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.

Leveraging risk. Using derivatives may result in a leveraged portfolio. Leverage increases a fund's losses when the value of its investments declines.

Liquidity risk. An impairment of a fund's ability to sell securities or close derivative positions at advantageous prices exposes the fund to liquidity risk. Liquidity risk may result from 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. Risks associated with loan participations and assignments include credit, interest-rate, counterparty, liquidity, and lending risk.

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.

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.

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.

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 800-225-5291, 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 NAV shares commenced operations on October 21, 2013. Because Class A shares had not commenced operations as of the date of this prospectus, the returns shown are those of Class NAV shares, except that they reflect Class A sales loads. Returns for Class A shares would have been substantially similar to returns of Class NAV 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. The returns have been adjusted to reflect the reduction in the maximum sales charge for Class A shares from 4.50% to 2.50%, effective February 3, 2014.

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

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 2.52%.

Best quarter: Q2 '14, 3.31%

Worst quarter: Q4 '14, –3.99%

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 Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) does not indicate future results.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

jhinvestments.com

1 Year

rr_AverageAnnualReturnYear01

(2.58%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 21, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

1.55%

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

2.50%

Small account fee (for fund account balances under $1,000) $

rr_ShareholderFeeOther

$ 20

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.30%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.22%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

628

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,690

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 2.52%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.31%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter: Q4 '14, –3.99%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2014

Since Inception

rr_AverageAnnualReturnSinceInception

(2.38%)

1 Year

rr_AverageAnnualReturnYear01

(5.44%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 21, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

(2.87%)

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

"Other expenses" have been estimated for the first year of operations of the fund's Class I shares.

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 in the fund for the time periods indicated assuming you redeem 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 [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 62% of the average value of its portfolio.

Strategy [Heading]

rr_StrategyHeading

Principal investment strategies

Risk [Heading]

rr_RiskHeading

Principal risks

Risk Lose Money [Text]

rr_RiskLoseMoney

Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Past performance

Bar Chart [Heading]

rr_BarChartHeading

Calendar year total returns—Class I (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 2.52%.

Best quarter: Q2 '14, 3.31%

Worst quarter: Q4 '14, –3.99%

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 Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) does not indicate future results.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

jhinvestments.com

1 Year

rr_AverageAnnualReturnYear01

(2.58%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 21, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

1.55%

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.73%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.91%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

290

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,120

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was 2.52%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.31%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter: Q4 '14, –3.99%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2014

Since Inception

rr_AverageAnnualReturnSinceInception

(0.27%)

1 Year

rr_AverageAnnualReturnYear01

(3.06%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 21, 2013

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

(1.29%)

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

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 $100,000 in the John Hancock family of funds.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (%) (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

September 30, 2016

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, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Not Sold

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 77% of the average value of its portfolio.

Strategy [Heading]

rr_StrategyHeading

Principal investment strategies

Risk [Heading]

rr_RiskHeading

Principal risks

Risk Lose Money [Text]

rr_RiskLoseMoney

Many factors affect performance, and fund shares will fluctuate in price, meaning you could lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Past performance

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Year-to-date total return. The fund's total return for the six months ended June 30, 2015, was –0.09%.

Best quarter: Q4 '08, 3.97%

Worst quarter: Q2 '13, –2.08%

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 Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) does not indicate future results.

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 Phone [Text]

rr_PerformanceAvailabilityPhone

800-225-5291

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

3.70%

Maximum Cumulative Sales Charge Over Other

rr_MaximumCumulativeSalesChargeOverOther

4.00%

Small account fee (for fund account balances under $1,000) $

rr_ShareholderFeeOther

$ 20

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.09%

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

0.98%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

722

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,666

Annual Return 2006

rr_AnnualReturn2006

3.70%

Annual Return 2008

rr_AnnualReturn2008

5.87%

Annual Return 2010

rr_AnnualReturn2010

5.84%

Annual Return 2012

rr_AnnualReturn2012

4.55%

Annual Return 2014

rr_AnnualReturn2014

4.36%

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

(0.09%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter: Q4 '08, 3.97%

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(2.08%)

1 Year

rr_AverageAnnualReturnYear01

0.15%

10 Years

rr_AverageAnnualReturnYear10

3.65%

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

1.78%

1 Year

rr_AverageAnnualReturnYear01

0.08%

10 Years

rr_AverageAnnualReturnYear10

2.30%

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge Over Other

rr_MaximumDeferredSalesChargeOverOther

5.00%

Management fee

rr_ManagementFeesOverAssets

0.62%

Other Expenses Over Assets

rr_OtherExpensesOverAssets

0.22%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.09%)

^[10]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 678

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,187

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

178

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

987

1 Year

rr_AverageAnnualReturnYear01

(1.54%)

10 Years

rr_AverageAnnualReturnYear10

3.45%

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge Over Other

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management fee

rr_ManagementFeesOverAssets

0.62%

Other Expenses Over Assets

rr_OtherExpensesOverAssets

0.22%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.09%)

^[10]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 278

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

987

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

178

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

987

1 Year

rr_AverageAnnualReturnYear01

2.46%

10 Years

rr_AverageAnnualReturnYear10

3.29%

Prospectus:

rr_ProspectusTable

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

To seek high current income. Capital appreciation is a secondary goal.

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 $100,000 in the John Hancock family of funds. More information about these and other discounts is available from your financial representative and on pages 19 to 21 of the prospectus under "Sales charge reductions and waivers" or pages 132 to 136 of the fund's Statement of Additional Information under "Initial sales charge on Class A shares."

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

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)

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense example

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Sold

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

80.00%

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 U.S. and foreign fixed-income securities rated BB/Ba or lower and their unrated equivalents. Bonds rated at or below BB by Standard & Poor's Ratings Services (S&P) or Fitch Ratings, Inc. (Fitch) or Ba by Moody's Investors Service, Inc. (Moody's) are considered junk bonds. These may include, but are not limited to, domestic and foreign corporate bonds and government obligations, debentures and notes, convertible securities and preferred securities. No more than 10% of the fund's total assets may be invested in securities that are rated in default by S&P or Moody's. The fund's investment policies are based on credit ratings at the time of purchase. There is no limit on the fund's average maturity.

The manager concentrates on industry allocation and securities selection in making investment decisions. The manager uses top-down analysis to determine which industries may benefit from current and future changes in the economy. The manager uses bottom-up research to find individual securities that appear comparatively undervalued. The manager looks at the financial condition of the issuers, as well as the collateralization and other features of the securities themselves. The fund may hold up to 20% of its total assets in the securities of companies in any one industry and up to 10% of its total assets in the securities of any individual issuer. The fund typically invests in a broad range of industries.

The fund may invest in both investment-grade and below-investment-grade asset-backed securities. The fund may use certain higher-risk investments, including restricted or illiquid securities and derivatives. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include futures contracts on securities, indexes and foreign currency; options on futures contracts, securities, indexes and foreign currency; interest-rate, foreign currency and credit default swaps; and foreign currency forward contracts. In addition, the fund may invest up to 20% of its assets in U.S. and foreign common stocks of companies of any size. The fund may trade securities actively.