Employee Stock Purchase and Stock Option Plans (Total Pre-Tax Compensation Cost Relating to Share-Based Payments Included in the Accompanying Consolidated Statements of Earnings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based compensation expense (pre-tax)	$ 32,370	$ 41,412	$ 43,400