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Derivatives Additional Information (Details) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended
	Jan. 07, 2015	Mar. 28, 2015	Mar. 28, 2015	Mar. 29, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Cap Agreements Aggregate Premium Payable	$ 6,100,000holx_InterestRateCapAgreementsAggregatePremiumPayable		$ 6,100,000holx_InterestRateCapAgreementsAggregatePremiumPayable	$ 0holx_InterestRateCapAgreementsAggregatePremiumPayable
Principal Amount Of Borrowings		1,000,000,000holx_PrincipalAmountOfBorrowings	1,000,000,000holx_PrincipalAmountOfBorrowings
Interest Payment Duration		two-year
Interest Rate Cash Flow Hedge Asset at Fair Value		3,600,000us-gaap_InterestRateCashFlowHedgeAssetAtFairValue	3,600,000us-gaap_InterestRateCashFlowHedgeAssetAtFairValue
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			$ 1,100,000us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

X

- Definition

Interest Payment Duration

+ References

No definition available.

+ Details

Name:	holx_InterestPaymentDuration
Namespace Prefix:	holx_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Interest rate cap agreements aggregate premium payable.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the aggregate outstanding principal of amounts borrowed under the Credit Agreement.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Definition

The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

+ References

No definition available.

+ Details

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

X

- Definition

Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

+ Details

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