Revenue (Schedule Of Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 26, 2022	Feb. 27, 2021	Feb. 26, 2022	Feb. 27, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 862,522	$ 773,995	$ 1,711,069	$ 1,545,899
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	$ 862,522	$ 773,995	$ 1,711,069	$ 1,545,899
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%	48.00%	48.00%	47.00%
Manufacturing Light [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	21.00%	20.00%	20.00%	20.00%
Retail/Wholesale [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	7.00%	7.00%	8.00%	7.00%
Government [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	7.00%	9.00%	7.00%	10.00%
Commercial Services [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	4.00%	5.00%	4.00%	4.00%
Other Customers [Member] | Net Sales [Member] | Customer Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	13.00%	11.00%	13.00%	12.00%
United States [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 817,026	$ 728,212	$ 1,616,101	$ 1,455,104
Concentration risk, percentage	95.00%	94.00%	94.00%	94.00%
Mexico [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 20,259	$ 21,802	$ 42,874	$ 42,168
Concentration risk, percentage	2.00%	3.00%	3.00%	3.00%
United Kingdom [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 13,546	$ 12,896	$ 28,141	$ 25,887
Concentration risk, percentage	2.00%	2.00%	2.00%	2.00%
Canada [Member] | Net Sales [Member] | Geographic Concentration Risk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 11,691	$ 11,085	$ 23,953	$ 22,740
Concentration risk, percentage	1.00%	1.00%	1.00%	1.00%