Employee Stock Plans - Activity Under Employee Stock Plans (Parenthetical) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 26, 2014	Sep. 27, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Options Exercisable	2,486	3,655
Weighted Average Exercise Price, Options Exercisable	$ 54.21	$ 50.18

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant