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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 |

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- 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

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- 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

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- 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

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

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- 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

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- 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