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Goodwill and Intangible Assets - Rollforward of Goodwill Activity by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
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Mar. 29, 2014
Goodwill [Line Items] |
Beginning balance | $ 2,814,528
Disposition of a portion of a reporting unit | (221)
Tax adjustments | (323)
Foreign currency and other | (4,170)
Ending balance | 2,809,814
Diagnostics [Member] |
Goodwill [Line Items] |
Beginning balance | 1,153,554
Disposition of a portion of a reporting unit | (221)
Tax adjustments | (323)
Foreign currency and other | (571)
Ending balance | 1,152,439
Breast Health [Member] |
Goodwill [Line Items] |
Beginning balance | 636,365
Disposition of a portion of a reporting unit |
Tax adjustments |
Foreign currency and other | (3,292)
Ending balance | 633,073
GYN Surgical [Member] |
Goodwill [Line Items] |
Beginning balance | 1,016,456
Disposition of a portion of a reporting unit |
Tax adjustments |
Foreign currency and other | (316)
Ending balance | 1,016,140
Skeletal Health [Member] |
Goodwill [Line Items] |
Beginning balance | 8,153
Disposition of a portion of a reporting unit |
Tax adjustments |
Foreign currency and other | 9
Ending balance | $ 8,162

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- Definition Amount of adjustments recorded to goodwill for taxes related to acquisitions. + References No definition available. + Details
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Namespace Prefix: | holx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

X
- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration