Employee Stock Plans - Activity Under Employee Stock Plans (Detail) - $ / shares shares in Thousands	12 Months Ended
	Oct. 02, 2015	Sep. 26, 2014	Sep. 27, 2013
Number of Shares
Beginning balance (in shares)	3,343	4,485	6,459
Granted (in shares)	634	625	613
Canceled, expired or forfeited (in shares)	(26)	(46)	(20)
Exercised (in shares)	(1,414)	(1,721)	(2,567)
Ending balance (in shares)	2,537	3,343	4,485
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 60.53	$ 53.02	$ 48.34
Granted (in dollars per share)	92.29	83.50	68.93
Canceled, expired or forfeited (in dollars per share)	77.53	72.35	60.81
Exercised (in dollars per share)	52.83	49.01	44.97
Ending balance (in dollars per share)	$ 72.58	$ 60.53	$ 53.02
Number of Shares (in shares)	1,596	2,486
Weighted Average Exercise Price (in dollars per share)	$ 62.97	$ 54.21