Employee Stock Purchase and Stock Option Plans (Information Regarding Stock Option Plans) (Details) - $ / shares	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
At fiscal year end:
Range of exercise prices for options outstanding, minimum (in dollars per share)	$ 32.51	$ 32.51	$ 25.87
Range of exercise prices for options outstanding, maximum (in dollars per share)	$ 80.63	$ 80.63	$ 94.11
Number of options exercisable	2,581,421	2,590,560	2,725,980
For the fiscal year:
Range of prices relating to options exercised, minimum (in dollars per share)	$ 36.88	$ 25.87	$ 20.98
Range of prices relating to options exercised, maximum (in dollars per share)	55.00	42.74	57.54
Estimated weighted average fair values of options granted	$ 12.80	$ 13.41	$ 19.04