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Sale of Makena - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 29, 2012	Sep. 26, 2015	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011
Regulatory Assets [Abstract]
Amended transaction price as a result of executing amendment		$ 199.5
Transaction Price Amounts Received					$ 12.4	$ 84.5
Final payment received	$ 60.0
Gain on net of certain contingent legal fees and amounts due to inventory	$ 53.9	$ 0.0	$ 0.0	$ 53.9

X

- Definition

Represents total transaction price for the sale of certain intellectual property rights as a result of executing an amendment to the original agreement.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Proceeds from sale of rights and intellectual property.

+ References

No definition available.

+ Details

Name:	holx_ProceedsFromSaleOfRightsAndIntellectualProperty
Namespace Prefix:	holx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Regulatory Assets [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	holx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents amount of the transaction price received pursuant to the contractual requirements prior to FDA approval. This amount was recorded as a deferred gain within current liabilities and recorded into income upon FDA approval.

+ References

No definition available.

+ Details

Name:	holx_TransactionPriceAmountsReceived
Namespace Prefix:	holx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of gain (loss) on sale or disposal of intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.7,9)



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 28



-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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