Debt (Shelf Facility Agreements) (Narrative) (Details)	9 Months Ended
	May 28, 2022 USD ($)
Shelf Facility Agreements [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity	$ 250,000,000
Private Placement Debt and Shelf Facility Agreements [Member]
Line of Credit Facility [Line Items]
Maximum consolidated leverage ratio of total indebtedness to EBITDA	3.00
Maximum consolidated leverage ratio of total indebtedness to EBITDA after material acquisition	3.50
Minimum consolidated interest coverage ratio of EBITDA to total interest expense	3.00
Series Notes Due January 12, 2023 [Member] | Shelf Facility Agreements [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 50,000,000
Interest rate	3.04%
Series Notes Due March 5, 2024 [Member] | Shelf Facility Agreements [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 50,000,000
Interest rate	2.40%
Maturity date	Mar. 05, 2024