XML 40 R73.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value Measurements - Estimated Fair Values of Convertible Notes (Detail) (USD $) In Millions, unless otherwise specified | Sep. 27, 2014 | Sep. 28, 2013
--- | --- | ---
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair values of debt instruments | $ 1,469.4 | $ 1,820.3
Two Thousand And Seven Notes [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair values of debt instruments | 0 | 405.0
2010 Notes [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair values of debt instruments | 536.6 | 510.8
2012 Notes [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair values of debt instruments | 531.7 | 518.8
2013 Notes [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair values of debt instruments | $ 401.1 | $ 385.7

X
- Details
Name: | holx_EstimatedFairValueOfFinancialInstrumentsLineItems
Namespace Prefix: | holx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Convertible Security -URI http://asc.fasb.org/extlink&oid=6509036 + Details
Name: | us-gaap_ConvertibleDebtFairValueDisclosures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant