Stockholders' Equity, Stock Option Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Number of Shares [Roll Forward]
Options outstanding, beginning of period (in shares)	10,744	10,760
Options granted (in shares)	2,259	1,453
Options exercised (in shares)	(2,476)	(1,176)
Options forfeited or cancelled (in shares)	(264)	(293)
Options outstanding, end of period (in shares)	10,263	10,744
Weighted Average Exercise Price [Roll Forward]
Options outstanding, beginning of period (in dollars per share)	$ 32.40	$ 28.18
Options granted (in dollars per share)	47.66	54.33
Options exercised (in dollars per share)	22.41	18.62
Options forfeited or cancelled (in dollars per share)	46.07	41.30
Options outstanding, end of period (in dollars per share)	37.82	32.40
Additional Information [Abstract]
Option price range at end of period, lower limit (in dollars per share)	3.04	3.04
Option price range at end of period, upper limit (in dollars per share)	$ 54.33	$ 54.33
Options exercisable at end of period (in shares)	4,720	5,154
Options available for grant at period end (in shares)	5,099	7,094
Weighted average fair value of options granted during period (in dollars per share)	$ 15.34	$ 17.84