Label

Element

Value

Prospectus:

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Supplement Text Block

jhit-20190626_SupplementTextBlock

Prospectus Supplement

John Hancock Investment Trust

John Hancock Disciplined Value International Fund (the "fund")

Supplement dated June 26, 2019 to the current Prospectus, as may be supplemented

Effective July 1, 2019, the "Annual fund operating expenses" table and the "Expense example" table in the "Fund summary" section are amended and restated as follows to reflect that the Rule 12b-1 fee rate for Class A shares of the fund is reduced:

Annual fund operating expenses (%) (expenses that you pay each year as a percentage of the value of your investment)	A		C	I	R2	R4		R6
Management fee	0.81		0.81	0.81	0.81	0.81		0.81
Distribution and service (Rule 12b-1) fees	0.25	1	1.00	0.00	0.25	0.25		0.00
Other expenses
Service plan fee	0.00		0.00	0.00	0.25	0.10	2	0.00
Additional other expenses	0.20		0.20	0.21	0.10	0.10		0.10	3
Total other expenses	0.20		0.20	0.21	0.35	0.20		0.10
Total annual fund operating expenses	1.26		2.01	1.02	1.41	1.26		0.91
Contractual expense reimbursement4	-0.02		-0.02	-0.04	-0.02	-0.12	5	-0.03
Total annual fund operating expenses after expense reimbursements	1.24		1.99	0.98	1.39	1.14		0.88

1	Distribution and service (Rule 12b-1) fees have been restated to reflect the Rule 12b-1 plan fee schedule effective July 1, 2019.
2	"Service plan fee" has been restated to reflect maximum allowable fees.
3	"Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.
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 0.88% of average daily net assets of the fund, and expenses of Class I and Class R6 shares exceed 0.98% and 0.88%, respectively, of average daily net assets attributable to the class. For purposes of these agreements, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense and "expenses of Class I and Class R6 shares" means expenses of the fund plus class-specific expenses. Each agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.
5	The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.

EXPENSE EXAMPLE

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:

Expenses ($)	A		C	I	R2	R4	R6
Shares		Sold	Not Sold
1 year	620	302	202	100	142	116	90
3 years	878	629	629	321	444	388	287
5 years	1,155	1,081	1,081	559	769	680	501
10 years	1,945	2,336	2,336	1,244	1,689	1,512	1,117

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund)

Prospectus:

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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

June 30, 2020

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

"Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.

Expense Example [Heading]

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EXPENSE EXAMPLE

Expense Example Narrative [Text Block]

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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

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class A

Prospectus:

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Management fee

rr_ManagementFeesOverAssets

0.81%

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

^[1]

Service plan fee

rr_Component1OtherExpensesOverAssets

none

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.20%

Total other expenses

rr_OtherExpensesOverAssets

0.20%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.26%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[2]

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.24%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 620

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

878

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,155

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,945

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class C

Prospectus:

rr_ProspectusTable

Management fee

rr_ManagementFeesOverAssets

0.81%

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Service plan fee

rr_Component1OtherExpensesOverAssets

none

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.20%

Total other expenses

rr_OtherExpensesOverAssets

0.20%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.01%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[2]

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.99%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 302

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

629

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,081

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,336

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

202

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

629

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,081

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,336

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class I

Prospectus:

rr_ProspectusTable

Management fee

rr_ManagementFeesOverAssets

0.81%

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Service plan fee

rr_Component1OtherExpensesOverAssets

none

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.21%

Total other expenses

rr_OtherExpensesOverAssets

0.21%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.02%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.04%)

^[2]

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

0.98%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 100

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

321

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

559

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,244

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class R2

Prospectus:

rr_ProspectusTable

Management fee

rr_ManagementFeesOverAssets

0.81%

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Service plan fee

rr_Component1OtherExpensesOverAssets

0.25%

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.10%

Total other expenses

rr_OtherExpensesOverAssets

0.35%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.41%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[2]

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.39%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 142

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

444

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

769

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,689

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class R4

Prospectus:

rr_ProspectusTable

Management fee

rr_ManagementFeesOverAssets

0.81%

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Service plan fee

rr_Component1OtherExpensesOverAssets

0.10%

^[3]

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.10%

Total other expenses

rr_OtherExpensesOverAssets

0.20%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.26%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[2],[4]

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

1.14%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 116

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

388

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

680

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,512

(John Hancock Disciplined Value International Fund - Classes A, C, I, R2, R4 and R6) | (John Hancock Disciplined Value International Fund) | Class R6

Prospectus:

rr_ProspectusTable

Management fee

rr_ManagementFeesOverAssets

0.81%

Distribution and service (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Service plan fee

rr_Component1OtherExpensesOverAssets

none

Additional other expenses

rr_Component2OtherExpensesOverAssets

0.10%

^[5]

Total other expenses

rr_OtherExpensesOverAssets

0.10%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.91%

Contractual expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.03%)

^[2]

Total annual fund operating expenses after expense reimbursements

rr_NetExpensesOverAssets

0.88%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 90

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

287

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

501

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,117

[1] Distribution and service (Rule 12b-1) fees have been restated to reflect the Rule 12b-1 plan fee schedule effective July 1, 2019.

[2] The advisor contractually agrees to reduce its management fee or, if necessary, make payment to the fund, in an amount equal to the amount by which expenses of the fund exceed 0.88% of average daily net assets of the fund, and expenses of Class I and Class R6 shares exceed 0.98% and 0.88%, respectively, of average daily net assets attributable to the class. For purposes of these agreements, "expenses of the fund" means all fund expenses, excluding (a) taxes, (b) brokerage commissions, (c) interest expense, (d) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the fund's business, (e) class-specific expenses, (f) borrowing costs, (g) prime brokerage fees, (h) acquired fund fees and expenses paid indirectly, and (i) short dividend expense and "expenses of Class I and Class R6 shares" means expenses of the fund plus class-specific expenses. Each agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time. The advisor also contractually agrees to waive a portion of its management fee and/or reimburse expenses for the fund and certain other John Hancock funds according to an asset level breakpoint schedule that is based on the aggregate net assets of all the funds participating in the waiver or reimbursement. This waiver is allocated proportionally among the participating funds. During its most recent fiscal year, the fund's reimbursement amounted to 0.01% of the fund's average daily net assets. This agreement expires on June 30, 2020, unless renewed by mutual agreement of the fund and the advisor based upon a determination that this is appropriate under the circumstances at that time.

[3] "Service plan fee" has been restated to reflect maximum allowable fees.

[4] The distributor contractually agrees to limit its Rule 12b-1 fees for Class R4 shares to 0.15%. This agreement expires on February 29, 2020, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.

[5] "Other expenses" have been restated from fiscal year amounts to reflect current fees and expenses.