Description Of Business and Basis Of Presentation (Details)	3 Months Ended		9 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
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