Revenue (Schedule Of Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands		12 Months Ended
		Aug. 28, 2021	Aug. 29, 2020	Aug. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales		$ 3,243,224	$ 3,192,399	$ 3,363,817
Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage		100.00%	100.00%
Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 3,243,224	$ 3,192,399
Concentration risk, percentage		100.00%	100.00%
Manufacturing Heavy [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage		48.00%	45.00%
Manufacturing Light [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage		20.00%	21.00%
Government [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage		9.00%	10.00%
Retail/Wholesale [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage		7.00%	7.00%
Commercial Services [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage		4.00%	5.00%
Other Customers [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	[1]	12.00%	12.00%
United States [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 3,049,543	$ 3,044,943
Concentration risk, percentage		94.00%	95.00%
Mexico [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 91,917	$ 57,549
Concentration risk, percentage		3.00%	2.00%
United Kingdom [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 54,844	$ 48,505
Concentration risk, percentage		2.00%	2.00%
Canada [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales		$ 46,920	$ 41,402
Concentration risk, percentage		1.00%	1.00%

[1] The Other category primarily includes individual customer and small business net sales not assigned to a specific industry classification.