DERIVATIVES (Commodity Contract Commitments) (Details) MWh in Thousands	3 Months Ended
	Nov. 30, 2023 MMBTU MWh t
Aluminum | Long
Derivative [Line Items]
Commodity contract commitments	2,525
Aluminum | Short
Derivative [Line Items]
Commodity contract commitments	1,150
Copper | Long
Derivative [Line Items]
Commodity contract commitments	612
Copper | Short
Derivative [Line Items]
Commodity contract commitments	10,433
Electricity | Long
Derivative [Line Items]
Commodity contract commitment, energy | MWh	3,257
Natural Gas | Long
Derivative [Line Items]
Commodity contract commitment, energy | MMBTU	5,150,550