Commitments and Contingencies - Recycling Operations - Other Legacy (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2023	Aug. 31, 2018	Aug. 31, 2022	Aug. 31, 2021
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 66,777	$ 66,777		$ 68,500	$ 77,128
Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration]			Cost of Goods and Services Sold
Legacy Environmental Site 1 - Remediation of Shredder Residue
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	4,000	4,000		4,000
Environmental remediation expense accrued in the period			$ 4,000
Legacy Environmental Site 1 - Remediation of Shredder Residue | Minimum
Loss Contingencies [Line Items]
Loss contingency, range of possible loss	0	0
Legacy Environmental Site 1 - Remediation of Shredder Residue | Maximum
Loss Contingencies [Line Items]
Loss contingency, range of possible loss	28,000	28,000
Soil Remediation Activities
Loss Contingencies [Line Items]
Recognized for certain soil remediation activities		7,000
Legacy Remediation of Site Previously Owned and Operated
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	10,000	10,000		7,000
Environmental Matters Member
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	5,000	5,000		$ 8,000
Metals Contamination
Loss Contingencies [Line Items]
Environmental remediation expense accrued in the period	3,000	7,600
Litigation settlement, cost of remedial action		7,900
Metals Contamination | Minimum
Loss Contingencies [Line Items]
Loss contingency, range of possible loss	0	0
Metals Contamination | Maximum
Loss Contingencies [Line Items]
Loss contingency, range of possible loss	$ 10,000	$ 10,000