DERIVATIVES (Commodity Contract Commitments) (Details) MWh in Thousands	3 Months Ended
	Nov. 30, 2022 MMBTU MWh t
Aluminum | Long
Derivative [Line Items]
Commodity contract commitments	2,025
Aluminum | Short
Derivative [Line Items]
Commodity contract commitments	1,425
Copper | Long
Derivative [Line Items]
Commodity contract commitments	374
Copper | Short
Derivative [Line Items]
Commodity contract commitments	8,550
Electricity | Long
Derivative [Line Items]
Commodity contract commitment, energy | MWh	3,051
Natural Gas | Long
Derivative [Line Items]
Commodity contract commitment, energy | MMBTU	5,230,350