Description Of Business and Basis Of Presentation (Details)	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of weeks in fiscal year			1 year	1 year
Number of weeks in fiscal quarter	3 months	3 months