Commitments and Contingencies - Changes to Environmental Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2024	Aug. 26, 2023	Aug. 27, 2022
Accrual For Environmental Loss Contingencies Roll Forward
Beginning balance	$ 30,029	$ 32,191
Costs incurred for which reserves have been provided	(3,176)	(1,936)
Insurance proceeds	238	147
Interest accretion	1,264	1,036	$ 596
Changes in discount rates	244	(2,446)
Revisions in estimates	2,656	1,037
Ending balance	$ 31,255	$ 30,029	$ 32,191
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities, Noncurrent	Accounts Payable and Accrued Liabilities, Noncurrent