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EMPLOYEE BENEFITS - Movement in the number of conditional shares (Details) - shares
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Opening balance 16,157,058 20,189,467
Granted 0 388,547
Closing balance 9,845,638 16,157,058
Conditional shares [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Opening balance 0  
Granted 5,860,760  
Closing balance 5,860,760 0
Conditional shares [Member] | 2022 [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Opening balance 0  
Granted 2,930,380  
Closing balance 2,930,380 0
Conditional shares [Member] | 2023 [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Opening balance 0  
Granted 2,930,380  
Closing balance 2,930,380 0