Debt Instrument, Aggregate Borrowings Availability

No definition available.

Name:	brks_DebtInstrumentAggregateBorrowingsAvailability
Namespace Prefix:	brks_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument, aggregate increase amount, maximum secured leverage ratio.

+ References

No definition available.

+ Details

Name:	brks_DebtInstrumentAggregateIncreaseAmountMaximumSecuredLeverageRatio
Namespace Prefix:	brks_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt instrument, amount issued at discount, discount percentage.

+ References

No definition available.

+ Details

Name:	brks_DebtInstrumentAmountIssuedAtDiscountDiscountPercentage
Namespace Prefix:	brks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt instrument, amount issued at discount, percent of par.

+ References

No definition available.

+ Details

Name:	brks_DebtInstrumentAmountIssuedAtDiscountPercentOfPar
Namespace Prefix:	brks_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Face Amount, Discounted from Par

+ References

No definition available.

+ Details

Name:	brks_DebtInstrumentFaceAmountDiscountedFromPar
Namespace Prefix:	brks_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instruments, Number

+ References

No definition available.

+ Details

Name:	brks_DebtInstrumentsNumber
Namespace Prefix:	brks_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brks_SeniorSecuredTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brks_SeniorSecuredIncrementalTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - General Information (Details) $ in Millions	Jul. 01, 2019 USD ($) loan	Feb. 15, 2019 USD ($)	Nov. 15, 2018 USD ($)	Oct. 04, 2017 USD ($)
Debt Instrument [Line Items]
Issue amount		$ 345.2
Aggregate increase amount				$ 75.0
Maximum secured leverage ratio				3.00
Secured Debt
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 5.2
Number of term loans \| loan	2
Senior Secured Term Loan Facility \| Secured Debt
Debt Instrument [Line Items]
Debt extinguished	$ 147.0
Face amount				$ 200.0
Issue amount				$ 197.6
Percentage of par (as a percent)				98.80%
Discount				$ 2.4
Discount percentage (as a percent)				1.20%
Senior Secured Incremental Term Loan Facility \| Secured Debt
Debt Instrument [Line Items]
Debt extinguished	$ 348.3	340.1
Loss on extinguishment of debt		9.1
Face amount		$ 349.1	$ 350.0
Issue amount			$ 340.5
Percentage of par (as a percent)		98.90%	97.30%
Discount		$ 4.0	$ 9.5
Discount percentage (as a percent)			2.70%