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DERIVATIVES AND RISK MANAGEMENT (Commodity Contract Commitments) (Details)
6 Months Ended
Feb. 28, 2018
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Aluminum | Long  
Derivative [Line Items]  
Commodity contract commitments 2,650
Aluminum | Short  
Derivative [Line Items]  
Commodity contract commitments 0
Copper | Long  
Derivative [Line Items]  
Commodity contract commitments 1,009
Copper | Short  
Derivative [Line Items]  
Commodity contract commitments 5,999