Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012
Finite Lived Intangible Assets [Line Items]
Accumulated amortization	$ (53.1)	$ (48.5)
Net carrying amount	23.4	26.8
Developed Technology Rights
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	36.6	36.3
Patents Licenses And Other
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	29.0	28.1
Customer Contracts And Relationships
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	$ 10.9	$ 10.9

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant