Revenue (Schedule Of Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 29, 2021	May 30, 2020	May 29, 2021	May 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 866,294	$ 834,972	$ 2,412,193	$ 2,444,667
Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 866,294	$ 834,972	$ 2,412,193	$ 2,444,667
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Manufacturing Heavy [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	48.00%	40.00%	47.00%	45.00%
Manufacturing Light [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	21.00%	19.00%	20.00%	22.00%
Government [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	9.00%	15.00%	10.00%	10.00%
Retail/Wholesale [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	7.00%	7.00%	7.00%	6.00%
Commercial Services [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	4.00%	5.00%	4.00%	5.00%
Other Customers [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	11.00%	14.00%	12.00%	12.00%
United States [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 813,049	$ 795,865	$ 2,268,153	$ 2,336,528
Concentration risk, percentage	94.00%	96.00%	94.00%	96.00%
Mexico [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 26,051	$ 19,305	$ 68,219	$ 39,723
Concentration risk, percentage	3.00%	2.00%	3.00%	2.00%
UK [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 14,688	$ 10,019	$ 40,575	$ 37,375
Concentration risk, percentage	2.00%	1.00%	2.00%	1.00%
Canada [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 12,506	$ 9,783	$ 35,246	$ 31,041
Concentration risk, percentage	1.00%	1.00%	1.00%	1.00%