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Commitments and Contingencies (Detail) $ in Millions		6 Months Ended
	Mar. 04, 2016 petition	Mar. 28, 2020 USD ($)	Jul. 27, 2018 USD ($)
Minerva
Loss Contingencies [Line Items]
Assessed damages			$ 4.8
Petitions filed | petition	2
Cynosure
Loss Contingencies [Line Items]
Payment of settlement compensation		$ 8.5

X

- Definition

Amount assessed in damages.

+ References

No definition available.

+ Details

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Namespace Prefix:	holx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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

X

- 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_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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X

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

+ Details

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Namespace Prefix:	us-gaap_
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: