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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 01, 2017	Dec. 31, 2016	Apr. 17, 2017	Mar. 22, 2017	Sep. 04, 2012
Loss Contingencies [Line Items]
Assessed damages					$ 4.0
Litigation Settlement, Amount	$ 8.5
Litigation Settlement, Expense		$ 9.2
Federal Funds Discount Rate
Loss Contingencies [Line Items]
Payment, spread on variable rate			5.00%
Cynosure
Loss Contingencies [Line Items]
Outstanding noncontrolling shares				1.2
Noncontrolling interest				$ 79.2
Purchase price (in dollars per share)				$ 66.00

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

Appraisal Of Stock, Payment Of Fair Value, Spread On Variable Rate

+ References

No definition available.

+ Details

Name:	holx_AppraisalOfStockPaymentOfFairValueSpreadOnVariableRate
Namespace Prefix:	holx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Minority Interest, Shares Outstanding

+ References

No definition available.

+ Details

Name:	holx_MinorityInterestSharesOutstanding
Namespace Prefix:	holx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472

+ Details

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

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect 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

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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Namespace Prefix:	us-gaap_
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X

- Details

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Namespace Prefix:
Data Type:	na
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X

- Details

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Namespace Prefix:
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