Commitments and Contingencies - Recycling Operations - Other Legacy (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	May 31, 2023	May 31, 2023	Aug. 31, 2018	Aug. 31, 2022
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 65,861,000	$ 65,861,000		$ 68,500,000
Legacy Environmental Site 1 - Remediation of Shredder Residue
Loss Contingencies [Line Items]
Environmental remediation expense accrued in the period			$ 4,000,000
Accrual for Environmental Loss Contingencies	4,000,000	4,000,000		4,000,000
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	28,000,000	28,000,000
Legacy Environmental Site 2 - Remediation of Soil and Groundwater Conditions
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	7,000,000	7,000,000		8,000,000
Soil Remediation Activities
Loss Contingencies [Line Items]
Accrued for certain soil remediation activities	6,000,000	7,000,000
Legacy Remediation of Site Previously Owned and Operated
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 7,000,000	7,000,000		$ 7,000,000
Metals Contamination
Loss Contingencies [Line Items]
Litigation settlement, cost of remedial action		7,900,000
Litigation settlement, amount payment other party		$ 7,600,000