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RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - ADDITIONAL INFORMATION (Details)
12 Months Ended
Jun. 30, 2016
Currency Swap  
Derivative [Line Items]  
Derivative, Term of Contract 5 years
Commodity Option | Future  
Derivative [Line Items]  
Derivative, Term of Contract 1 year
Commodity Option | Swap  
Derivative [Line Items]  
Derivative, Term of Contract 5 years