Segment Reporting Information by Item Category (Details)	12 Months Ended
	Sep. 02, 2018	Sep. 03, 2017	Aug. 28, 2016
Food and Sundries [Member]
Revenue from External Customer [Line Items]
Percentage of net sales	41.00%	41.00%	43.00%
Hardlines
Revenue from External Customer [Line Items]
Percentage of net sales	16.00%	16.00%	16.00%
Fresh Foods
Revenue from External Customer [Line Items]
Percentage of net sales	14.00%	14.00%	14.00%
Softlines
Revenue from External Customer [Line Items]
Percentage of net sales	11.00%	12.00%	12.00%
Ancillary
Revenue from External Customer [Line Items]
Percentage of net sales	18.00%	17.00%	15.00%