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v2.4.1.9

Supplemental Guarantor Condensed Consolidating Financials - Schedule of Consolidating Statement of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Dec. 27, 2014 | Dec. 28, 2013
OPERATING ACTIVITIES |  |
Net cash provided by (used in) operating activities | $ 153.5 us-gaap_NetCashProvidedByUsedInOperatingActivities | $ 149.3 us-gaap_NetCashProvidedByUsedInOperatingActivities
INVESTING ACTIVITIES |  |
Net proceeds from sale of business | 0 holx_ProceedsFromSaleOfBusiness | 2.4 holx_ProceedsFromSaleOfBusiness
Purchase of property and equipment | (10.8)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (8.4)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Increase in equipment under customer usage agreements | (10.3)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements | (8.0)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements
Net sales of insurance contracts | (6.4)us-gaap_PaymentsForProceedsFromLifeInsurancePolicies | 13.8 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies
Purchases of mutual funds | 0 us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment | 29.7 us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment
Sales of mutual funds | 6.4 us-gaap_ProceedsFromPaymentsForTradingSecurities | 15.9 us-gaap_ProceedsFromPaymentsForTradingSecurities
(Increase) decrease in other assets | (0.9)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets | (0.4)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets
Net cash used in investing activities | (22.0)us-gaap_NetCashProvidedByUsedInInvestingActivities | (14.4)us-gaap_NetCashProvidedByUsedInInvestingActivities
FINANCING ACTIVITIES |  |
Repayment of long-term debt | (328.8)us-gaap_RepaymentsOfLongTermDebt | (521.3)us-gaap_RepaymentsOfLongTermDebt
Net proceeds from issuance of common stock pursuant to employee stock plans | 15.2 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions | 12.9 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Excess tax benefit related to equity awards | 3.0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 3.0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Payment of minimum tax withholdings on net share settlements of equity awards | (10.6)holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits | (9.1)holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits
Net cash used in financing activities | (321.2)us-gaap_NetCashProvidedByUsedInFinancingActivities | (514.5)us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes on cash and cash equivalents | (2.4)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | (0.4)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net decrease in cash and cash equivalents | (192.1)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (380.0)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period | 736.1 us-gaap_CashAndCashEquivalentsAtCarryingValue | 822.5 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period | 544.0 us-gaap_CashAndCashEquivalentsAtCarryingValue | 442.5 us-gaap_CashAndCashEquivalentsAtCarryingValue
Eliminations |  |
OPERATING ACTIVITIES |  |
Net cash provided by (used in) operating activities | 0 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInOperatingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
INVESTING ACTIVITIES |  |
Net proceeds from sale of business |  | 0 holx_ProceedsFromSaleOfBusiness / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Purchase of property and equipment | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Increase in equipment under customer usage agreements | 0 holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net sales of insurance contracts | 0 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Purchases of mutual funds |  | 0 us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Sales of mutual funds | 0 us-gaap_ProceedsFromPaymentsForTradingSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ProceedsFromPaymentsForTradingSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
(Increase) decrease in other assets | 0 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net cash used in investing activities | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInInvestingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
FINANCING ACTIVITIES |  |
Repayment of long-term debt | 0 us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_RepaymentsOfLongTermDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net proceeds from issuance of common stock pursuant to employee stock plans | 0 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Excess tax benefit related to equity awards | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Payment of minimum tax withholdings on net share settlements of equity awards | 0 holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net cash used in financing activities | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Effect of exchange rate changes on cash and cash equivalents | 0 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Net decrease in cash and cash equivalents | 0 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash and cash equivalents, beginning of period | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Cash and cash equivalents, end of period | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Parent/Issuer |  |
OPERATING ACTIVITIES |  |
Net cash provided by (used in) operating activities | 186.9 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 301.6 us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
INVESTING ACTIVITIES |  |
Net proceeds from sale of business |  | 0 holx_ProceedsFromSaleOfBusiness / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Purchase of property and equipment | (2.4)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (2.9)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Increase in equipment under customer usage agreements | 0 holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (0.4)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net sales of insurance contracts | (6.4)us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 13.8 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Purchases of mutual funds |  | 29.7 us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Sales of mutual funds | 6.4 us-gaap_ProceedsFromPaymentsForTradingSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 15.9 us-gaap_ProceedsFromPaymentsForTradingSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
(Increase) decrease in other assets | (0.8)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0.1 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash used in investing activities | (3.2)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3.2)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
FINANCING ACTIVITIES |  |
Repayment of long-term debt | (328.8)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (521.3)us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net proceeds from issuance of common stock pursuant to employee stock plans | 15.2 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 12.9 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Excess tax benefit related to equity awards | 3.0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3.0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Payment of minimum tax withholdings on net share settlements of equity awards | (10.6)holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (9.1)holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash used in financing activities | (321.2)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (514.5)us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Effect of exchange rate changes on cash and cash equivalents | 0 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net decrease in cash and cash equivalents | (137.5)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (216.1)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents, beginning of period | 288.1 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 321.5 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents, end of period | 150.6 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 105.4 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Guarantor Subsidiaries |  |
OPERATING ACTIVITIES |  |
Net cash provided by (used in) operating activities | (25.9)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (142.0)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
INVESTING ACTIVITIES |  |
Net proceeds from sale of business |  | 0 holx_ProceedsFromSaleOfBusiness / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Purchase of property and equipment | (5.6)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (3.2)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Increase in equipment under customer usage agreements | (6.5)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (4.3)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net sales of insurance contracts | 0 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Purchases of mutual funds |  | 0 us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Sales of mutual funds | 0 us-gaap_ProceedsFromPaymentsForTradingSecurities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromPaymentsForTradingSecurities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
(Increase) decrease in other assets | (0.1)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (1.0)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net cash used in investing activities | (12.2)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (8.5)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
FINANCING ACTIVITIES |  |
Repayment of long-term debt | 0 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net proceeds from issuance of common stock pursuant to employee stock plans | 0 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Excess tax benefit related to equity awards | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Payment of minimum tax withholdings on net share settlements of equity awards | 0 holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net cash used in financing activities | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Effect of exchange rate changes on cash and cash equivalents | (0.3)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0.1 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net decrease in cash and cash equivalents | (38.4)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (150.4)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents, beginning of period | 287.8 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 387.4 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents, end of period | 249.4 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 237.0 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Non-Guarantor Subsidiaries |  |
OPERATING ACTIVITIES |  |
Net cash provided by (used in) operating activities | (7.5)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (10.3)us-gaap_NetCashProvidedByUsedInOperatingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
INVESTING ACTIVITIES |  |
Net proceeds from sale of business |  | 2.4 holx_ProceedsFromSaleOfBusiness / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Purchase of property and equipment | (2.8)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (2.3)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Increase in equipment under customer usage agreements | (3.8)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (3.3)holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net sales of insurance contracts | 0 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_PaymentsForProceedsFromLifeInsurancePolicies / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Purchases of mutual funds |  | 0 us-gaap_PaymentsToAcquireTradingSecuritiesHeldforinvestment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Sales of mutual funds | 0 us-gaap_ProceedsFromPaymentsForTradingSecurities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromPaymentsForTradingSecurities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
(Increase) decrease in other assets | 0 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0.5 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net cash used in investing activities | (6.6)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (2.7)us-gaap_NetCashProvidedByUsedInInvestingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
FINANCING ACTIVITIES |  |
Repayment of long-term debt | 0 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net proceeds from issuance of common stock pursuant to employee stock plans | 0 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Excess tax benefit related to equity awards | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Payment of minimum tax withholdings on net share settlements of equity awards | 0 holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net cash used in financing activities | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_NetCashProvidedByUsedInFinancingActivities / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Effect of exchange rate changes on cash and cash equivalents | (2.1)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (0.5)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net decrease in cash and cash equivalents | (16.2)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (13.5)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents, beginning of period | 160.2 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 113.5 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents, end of period | $ 144.0 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | $ 100.0 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember

X
- Definition The payment of minimum statutory tax withholdings to taxing authorities on the behalf of employees from the net share settlement upon vesting of restricted stock units. This payment is not an expense of the Company nor an operating activity. + References No definition available. + Details
Name: | holx_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits
Namespace Prefix: | holx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow related to equipment placed at customer locations for which title is not transferred to the Company's customers. + References No definition available. + Details
Name: | holx_PaymentsToManufactureEquipmentUnderCustomerUsageAgreements
Namespace Prefix: | holx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Proceeds from sale of business. + References No definition available. + Details
Name: | holx_ProceedsFromSaleOfBusiness
Namespace Prefix: | holx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
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- Definition Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition The net cash outflow or inflow for net proceeds and payments derived from carrying life insurance policies for which the entity is the beneficiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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