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Grifols Collaboration Agreement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 1 Months Ended
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Sep. 27, 2014 | Sep. 28, 2013 | Jul. 31, 2009 Grifols [Member] Collaboration Agreement [Member] 2012-2013 [Member] | Jul. 31, 2009 Grifols [Member] Collaboration Agreement [Member] 2014 [Member] | Jul. 31, 2009 Grifols [Member] Collaboration Agreement [Member] 2015 [Member] | Jul. 31, 2009 Blood screening [Member] Grifols [Member] Collaboration Agreement [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |  |  |  |
Manufacturing costs entitled to recover |  |  |  |  |  | 50.00%
Share of revenue from assay that includes test for HCV |  |  | 47.00% | 48.00% | 50.00% |
Share of revenue from assay that excludes test for HCV |  |  |  |  |  | 50.00%
Collaboration agreements revenue | $ 223.3 | $ 197.9 |  |  |  |

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- Definition Collaboration agreements revenue. + References No definition available. + Details
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Namespace Prefix: | holx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Manufacturing Costs Entitled To Recover + References No definition available. + Details
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Namespace Prefix: | holx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the percentage of revenue that the Company is entitled to receive from Novartis from the use of any assay that does not test for HCV. + References No definition available. + Details
Name: | holx_ShareOfRevenueFromAnyAssayThatExcludesTestForHcv
Namespace Prefix: | holx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of revenue that the Company is entitled to receive from Novartis from the use of any assay that includes a test for HCV. + References No definition available. + Details
Name: | holx_ShareOfRevenueFromAnyAssayThatIncludesTestForHcv
Namespace Prefix: | holx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration