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Prospectus: rr_ProspectusTable  
Supplement Text Block jhinvgrbdfd-20160701_SupplementTextBlock
 
John Hancock Bond Trust
Supplement dated July 1, 2016 to the current Prospectus
 
John Hancock Investment Grade Bond Fund (the fund)
 
Effective July 1, 2016, the Annual fund operating expenses table and the Expense example table for the fund in the "Fund summary" section are revised and restated as follows:
 
Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)
A
B
C
I
R2
 
R4
 
R6
 
Management fee
0.40
0.40
0.40
0.40
0.40
 
0.40
 
0.40
 
Distribution and service (Rule 12b-1) fees
0.25
1.00
1.00
0.00
0.25
 
0.25
 
0.00
 
Other expenses
 
 
 
 
 
 
 
 
 
 
Service plan fee
0.00
0.00
0.00
0.00
0.25
 
0.10
 
0.00
 
Additional other expenses
0.23
0.23
0.23
0.22
0.12
1
0.12
1
0.12
1
Total other expenses
0.23
0.23
0.23
0.22
0.37
 
0.22
 
0.12
 
Total annual fund operating expenses
0.88
1.63
1.63
0.62
1.02
 
0.87
 
0.52
 
Contractual expense reimbursement2
–0.08
–0.08
–0.08
–0.08
–0.08
 
–0.18
3
–0.10
 
Total annual fund operating expenses after expense reimbursements
0.80
1.55
1.55
0.54
0.94
 
0.69
 
0.42
 
 
1
"Other expenses" have been estimated for the first year of operations of the fund's Class R2, Class R4, and Class R6 shares.
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 0.42% of average annual net assets (on an annualized basis) 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. The advisor also contractually agrees to waive and/or reimburse all class-specific expenses for Class R6 shares to the extent they exceed 0.00% of average annual net assets (on an annualized basis) attributable to the class. These agreements expire on September 30, 2017, 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.
3
The distributor contractually agrees to waive 0.10% of Rule 12b-1 fees for Class R4 shares. This agreement expires on September 30, 2017, 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
            B
            C
I
  
R2
R4
R6
Shares
 
Sold
  
Not Sold
 
Sold
 
Not Sold
 
 
 
 
 
 
1 year
478
658
  
158
 
258
 
158
 
55
 
96
70
43
3 years
662
806
  
506
 
506
 
506
 
190
 
317
260
157
5 years
861
1,079
  
879
 
879
 
879
 
338
 
555
465
281
10 years
1,434
1,725
  
1,725
 
1,926
 
1,926
 
767
 
1,241
1,056
643
 
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund)  
Prospectus: rr_ProspectusTable  
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 September 30, 2017
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 R2, Class R4, and Class R6 shares.
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

(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class A  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.23%
Total other expenses rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 0.88%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [1]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.80%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 478
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 662
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 861
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,434
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class B  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.23%
Total other expenses rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 1.63%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [1]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.55%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 658
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 806
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,079
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,725
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 158
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 506
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 879
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,725
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class C  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.23%
Total other expenses rr_OtherExpensesOverAssets 0.23%
Total annual fund operating expenses rr_ExpensesOverAssets 1.63%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [1]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.55%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 258
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 506
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 879
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,926
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 158
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 506
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 879
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,926
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class I  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.22%
Total other expenses rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 0.62%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [1]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.54%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 55
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 190
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 338
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 767
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class R2  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.25%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.12% [2]
Total other expenses rr_OtherExpensesOverAssets 0.37%
Total annual fund operating expenses rr_ExpensesOverAssets 1.02%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [1]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.94%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 317
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 555
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,241
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class R4  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Service plan fee rr_Component1OtherExpensesOverAssets 0.10%
Additional other expenses rr_Component2OtherExpensesOverAssets 0.12% [2]
Total other expenses rr_OtherExpensesOverAssets 0.22%
Total annual fund operating expenses rr_ExpensesOverAssets 0.87%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [1],[3]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.69%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 260
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 465
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,056
(John Hancock Investment Grade Bond Fund - Classes A, B, C, I, R2, R4 and R6) | (John Hancock Investment Grade Bond Fund) | Class R6  
Prospectus: rr_ProspectusTable  
Management fee rr_ManagementFeesOverAssets 0.40%
Distribution and service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Service plan fee rr_Component1OtherExpensesOverAssets none
Additional other expenses rr_Component2OtherExpensesOverAssets 0.12% [2]
Total other expenses rr_OtherExpensesOverAssets 0.12%
Total annual fund operating expenses rr_ExpensesOverAssets 0.52%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.42%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 43
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 157
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 281
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 643
[1] 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 0.42% of average annual net assets (on an annualized basis) 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. The advisor also contractually agrees to waive and/or reimburse all class-specific expenses for Class R6 shares to the extent they exceed 0.00% of average annual net assets (on an annualized basis) attributable to the class. These agreements expire on September 30, 2017, 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.
[2] "Other expenses" have been estimated for the first year of operations of the fund's Class R2, Class R4, and Class R6 shares.
[3] The distributor contractually agrees to waive 0.10% of Rule 12b-1 fees for Class R4 shares. This agreement expires on September 30, 2017, 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.