Employee Stock Purchase and Stock Option Plans (Stock Option Activity Under the 1999 Plans and the 1981 Plan) (Details) - $ / shares	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of stock options outstanding, beginning balance (in shares)	4,072,707	4,221,147	4,606,212
Number of stock options granted (in shares)	460,770	614,759	602,525
Number of stock options exercised (in shares)	(412,416)	(34,000)	(718,065)
Number of stock options cancelled or expired (in shares)	(543,549)	(729,199)	(269,525)
Number of stock options outstanding, ending balance (in shares)	3,577,512	4,072,707	4,221,147
Options outstanding weighted average price (in dollars per share)	$ 46.06	$ 53.23	$ 52.33
Weighted average exercise price options granted (in dollars per share)	42.17	43.56	53.51
Weighted average exercise price options exercised (in dollars per share)	40.88	31.54	47.18
Weighted average exercise price options cancelled or expired (in dollars per share)	49.13	86.15	54.46
Options outstanding weighted average price (in dollars per share)	$ 45.69	$ 46.06	$ 53.23