Segment Reporting Information by Item Category (Details)	12 Months Ended
	Sep. 03, 2017	Aug. 28, 2016	Aug. 30, 2015
Foods
Revenue from External Customer [Line Items]
Percentage of net sales	21.00%	22.00%	22.00%
Sundries
Revenue from External Customer [Line Items]
Percentage of net sales	20.00%	21.00%	21.00%
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	12.00%	12.00%	11.00%
Ancillary
Revenue from External Customer [Line Items]
Percentage of net sales	17.00%	15.00%	16.00%