Description Of Business and Basis Of Presentation (Details)	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Apr. 01, 2016
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