Employee Stock Plans - Summary of Share-Based Awards Available for Grant (Detail) - shares shares in Thousands	12 Months Ended
Oct. 02, 2015	Sep. 26, 2014	Sep. 27, 2013
Shares Available for Grant
Shares Available for Grant, Beginning Balance	8,168	9,925	11,868
Granted (in shares)	(1,838)	(1,934)	(2,045)
Canceled or expired (in shares)	331	177	102
Ending balance (in shares)	6,661	8,168	9,925

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant