rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

JOHN HANCOCK BOND TRUST

Prospectus Date

rr_ProspectusDate

Oct. 01, 2011

jhf3_SupplementTextBlock

John Hancock High Yield Fund (the fund)
Supplement dated 6—5—12 to the current Class A, Class B and Class C shares Prospectus

In the “Fund summary” section, the information under the headings “Fees and expenses” and “Expense example” is amended and restated by the following:

Fees and expenses

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 on pages 14 to 16 of the prospectus under “Sales charge reductions and waivers” or pages 94 to 98 of the fund’s statement of additional information under “Initial Sales Charge on Class A Shares.”


Shareholder fees (%) (fees paid directly from your investment)	Class A		Class B		Class C

Maximum front-end sales charge (load) on purchases as a % of purchase price		4.50		—		—
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less	1.00 (on certain purchases, including those of $1 million or more)			5.00		1.00


Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)	Class A		Class B		Class C

Management fee¹		0.50		0.50		0.50
Distribution and service (12b-1) fees		0.25		1.00		1.00
Other expenses²		0.27		0.27		0.27
Total annual fund operating expenses		1.02		1.77		1.77


1		“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

2		“Other expenses” have been restated to reflect current transfer agency and service fees.

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 in the fund for the time periods indicated (Kept column) and then assuming a redemption of all of your shares at the end of those periods (Sold column). The example assumes a 5% average annual return. The example assumes 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 ($)	Class A				Class B				Class C
Shares	Sold		Kept		Sold		Kept		Sold		Kept

1 Year		549		549		680		180		280		180
3 Years		760		760		857		557		557		557
5 Years		988		988		1,159		959		959		959
10 Years		1,642		1,642		1,886		1,886		2,084		2,084

John Hancock High Yield Fund (the fund)
Supplement dated 6—5—12 to the current Class I shares Prospectus

In the “Fund summary” section, the information under the headings “Fees and expenses” and “Expense example” is amended and restated by the following:

Fees and expenses

This table describes the fees and expenses you may pay if you buy and hold shares of the fund.


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

Maximum front-end sales charge (load) on purchases as a % of purchase price		None
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less		None


Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)	Class I

Management fee¹		0.50
Other expenses²		0.17
Total annual fund operating expenses		0.67


1		“Management fee” has been restated to reflect new management fee rate effective June 1, 2012.


2		“Other expenses” have been restated to reflect current transfer agency and service fees.

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 at the end of the various time frames indicated. The example assumes a 5% average annual return. The example assumes 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 ($)	Class I

1 Year		68
3 Years		214
5 Years		373
10 Years		835

John Hancock High Yield Fund (the fund)
Supplement dated 6—5—12 to the current Class R6 shares Prospectus

In the “Fund summary” section, the information under the headings “Fees and expenses” and “Expense example” is amended and restated by the following:

Fees and expenses

This table describes the fees and expenses you may pay if you buy and hold shares of the fund.


Shareholder fees (%) (fees paid directly from your investment)		Class R6

Maximum front-end sales charge (load) on purchases as a % of purchase price		None
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less		None


Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)	Class R6

Management fee¹		0.50
Other expense²		0.12
Total annual fund operating expenses		0.62


¹		“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

²		“Other expenses” have been estimated for the first year of operations of the fund’s Class R6 shares.

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 at the end of the various time frames indicated. The example assumes a 5% average annual return. The example assumes 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 ($)	Class R6

1 Year		63
3 Years		199

John Hancock High Yield Fund | Prospectus Class A, B and C Shares

rr_RiskReturnAbstract

Expense Narrative [Text Block]

jhf3_SupplementTextBlock

John Hancock High Yield Fund (the fund)
Supplement dated 6—5—12 to the current Class A, Class B and Class C shares Prospectus

In the “Fund summary” section, the information under the headings “Fees and expenses” and “Expense example” is amended and restated by the following:

Fees and expenses


Shareholder fees (%) (fees paid directly from your investment)	Class A		Class B		Class C

Maximum front-end sales charge (load) on purchases as a % of purchase price		4.50		—		—
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less	1.00 (on certain purchases, including those of $1 million or more)			5.00		1.00


Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)	Class A		Class B		Class C

Management fee¹		0.50		0.50		0.50
Distribution and service (12b-1) fees		0.25		1.00		1.00
Other expenses²		0.27		0.27		0.27
Total annual fund operating expenses		1.02		1.77		1.77


1		“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

2		“Other expenses” have been restated to reflect current transfer agency and service fees.

Expense example


Expenses ($)	Class A				Class B				Class C
Shares	Sold		Kept		Sold		Kept		Sold		Kept

1 Year		549		549		680		180		280		180
3 Years		760		760		857		557		557		557
5 Years		988		988		1,159		959		959		959
10 Years		1,642		1,642		1,886		1,886		2,084		2,084

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

rr_ExpenseNarrativeTextBlock

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)

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. More information about these and other discounts is available on pages 14 to 16 of the prospectus under “Sales charge reductions and waivers” or pages 94 to 98 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

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense example

Expense Example by Year [Heading]

rr_ExpenseExampleByYearHeading

Expenses ($)

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Sold

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Kept

John Hancock High Yield Fund | Prospectus Class A, B and C Shares | Class A

Maximum front-end sales charge (load) on purchases as a % of purchase price

rr_RiskReturnAbstract

rr_MaximumCumulativeSalesChargeOverOther

4.50%

Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[1]

Distribution and service (12b-1) fees

rr_ManagementFeesOverAssets

0.50%

^[2]

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.27%

^[3]

rr_ExpensesOverAssets

1.02%

rr_ExpenseExampleYear01

549

rr_ExpenseExampleYear03

760

rr_ExpenseExampleYear05

988

rr_ExpenseExampleYear10

1,642

rr_ExpenseExampleNoRedemptionYear01

549

rr_ExpenseExampleNoRedemptionYear03

760

rr_ExpenseExampleNoRedemptionYear05

988

rr_ExpenseExampleNoRedemptionYear10

1,642

John Hancock High Yield Fund | Prospectus Class A, B and C Shares | Class B

Maximum front-end sales charge (load) on purchases as a % of purchase price

rr_RiskReturnAbstract

rr_MaximumCumulativeSalesChargeOverOther

Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less

rr_MaximumDeferredSalesChargeOverOther

5.00%

Distribution and service (12b-1) fees

rr_ManagementFeesOverAssets

0.50%

^[2]

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.27%

^[3]

rr_ExpensesOverAssets

1.77%

rr_ExpenseExampleYear01

680

rr_ExpenseExampleYear03

857

rr_ExpenseExampleYear05

1,159

rr_ExpenseExampleYear10

1,886

rr_ExpenseExampleNoRedemptionYear01

180

rr_ExpenseExampleNoRedemptionYear03

557

rr_ExpenseExampleNoRedemptionYear05

959

rr_ExpenseExampleNoRedemptionYear10

1,886

John Hancock High Yield Fund | Prospectus Class A, B and C Shares | Class C

Maximum front-end sales charge (load) on purchases as a % of purchase price

rr_RiskReturnAbstract

rr_MaximumCumulativeSalesChargeOverOther

Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and service (12b-1) fees

rr_ManagementFeesOverAssets

0.50%

^[2]

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.27%

^[3]

rr_ExpensesOverAssets

1.77%

rr_ExpenseExampleYear01

280

rr_ExpenseExampleYear03

557

rr_ExpenseExampleYear05

959

rr_ExpenseExampleYear10

2,084

rr_ExpenseExampleNoRedemptionYear01

180

rr_ExpenseExampleNoRedemptionYear03

557

rr_ExpenseExampleNoRedemptionYear05

959

rr_ExpenseExampleNoRedemptionYear10

2,084

John Hancock High Yield Fund | Prospectus Class I Shares

rr_RiskReturnAbstract

Expense Narrative [Text Block]

jhf3_SupplementTextBlock

John Hancock High Yield Fund (the fund)
Supplement dated 6—5—12 to the current Class I shares Prospectus

In the “Fund summary” section, the information under the headings “Fees and expenses” and “Expense example” is amended and restated by the following:

Fees and expenses

This table describes the fees and expenses you may pay if you buy and hold shares of the fund.


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

Maximum front-end sales charge (load) on purchases as a % of purchase price		None
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less		None


Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)	Class I

Management fee¹		0.50
Other expenses²		0.17
Total annual fund operating expenses		0.67


1		“Management fee” has been restated to reflect new management fee rate effective June 1, 2012.


2		“Other expenses” have been restated to reflect current transfer agency and service fees.

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 at the end of the various time frames indicated. The example assumes a 5% average annual return. The example assumes 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 ($)	Class I

1 Year		68
3 Years		214
5 Years		373
10 Years		835

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

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)

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense example

Expense Example by Year [Heading]

rr_ExpenseExampleByYearHeading

Expenses ($)

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 at the end of the various time frames indicated. The example assumes a 5% average annual return. The example assumes 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

Kept

John Hancock High Yield Fund | Prospectus Class I Shares | Class I

Maximum front-end sales charge (load) on purchases as a % of purchase price

rr_RiskReturnAbstract

rr_MaximumCumulativeSalesChargeOverOther

none

Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.50%

^[2]

rr_OtherExpensesOverAssets

0.17%

^[3]

rr_ExpensesOverAssets

0.67%

rr_ExpenseExampleYear01

rr_ExpenseExampleYear03

214

rr_ExpenseExampleYear05

373

rr_ExpenseExampleYear10

835

John Hancock High Yield Fund | Prospectus Class R6 Shares

rr_RiskReturnAbstract

Expense Narrative [Text Block]

jhf3_SupplementTextBlock

John Hancock High Yield Fund (the fund)
Supplement dated 6—5—12 to the current Class R6 shares Prospectus

In the “Fund summary” section, the information under the headings “Fees and expenses” and “Expense example” is amended and restated by the following:

Fees and expenses

This table describes the fees and expenses you may pay if you buy and hold shares of the fund.


Shareholder fees (%) (fees paid directly from your investment)		Class R6

Maximum front-end sales charge (load) on purchases as a % of purchase price		None
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less		None


Annual fund operating expenses (%)
(expenses that you pay each year as a percentage of the value of your investment)	Class R6

Management fee¹		0.50
Other expense²		0.12
Total annual fund operating expenses		0.62


¹		“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

²		“Other expenses” have been estimated for the first year of operations of the fund’s Class R6 shares.

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 at the end of the various time frames indicated. The example assumes a 5% average annual return. The example assumes 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 ($)	Class R6

1 Year		63
3 Years		199

Expense [Heading]

rr_ExpenseHeading

Fees and expenses

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)

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

“Management fee” has been restated to reflect the new management fee rate effective June 1, 2012.

Expense Example [Heading]

rr_ExpenseExampleHeading

Expense example

Expense Example by Year [Heading]

rr_ExpenseExampleByYearHeading

Expenses ($)

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 at the end of the various time frames indicated. The example assumes a 5% average annual return. The example assumes 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

Kept

John Hancock High Yield Fund | Prospectus Class R6 Shares | Class R6

Maximum front-end sales charge (load) on purchases as a % of purchase price

rr_RiskReturnAbstract

rr_MaximumCumulativeSalesChargeOverOther

none

Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.50%

^[2]

rr_OtherExpensesOverAssets

0.12%

^[3]

rr_ExpensesOverAssets

0.62%

rr_ExpenseExampleYear01