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DERIVATIVES AND RISK MANAGEMENT (Commodity Contract Commitments) (Details) - 9 months ended May. 31, 2015 | BTU t
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Aluminum | Long |
Derivative [Line Items] |
Commodity contract commitments | 3,746
Aluminum | Short |
Derivative [Line Items] |
Commodity contract commitments | 325
Copper | Long |
Derivative [Line Items] |
Commodity contract commitments | 826
Copper | Short |
Derivative [Line Items] |
Commodity contract commitments | 5,364
Zinc | Long |
Derivative [Line Items] |
Commodity contract commitments | 29
Natural Gas | Long |
Derivative [Line Items] |
Energy contract commitments | BTU | 180,000,000,000

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