Effective Portion of Foreign Currency Forward Contracts Designated as Cash Flow Hedges (Detail) (Foreign Exchange Contract, USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Foreign Exchange Contract
Derivative [Line Items]
Gain Recognized in Other Comprehensive income (Effective Portion)	$ 3.9	$ 0.5	$ 1.4
Gain Reclassified from Accumulated Other Comprehensive Income into Net Earnings (Effective Portion)	$ 1.3	$ 2.5	$ 0.6

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4D

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624177-113959

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration