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Related Party Transactions - Summary of Transactions with Related Parties (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Joint operations [member]    
Disclosure of transactions between related parties [Line Items]    
Sales of goods/services $ 0 $ 0
Interest income 1,764 1,850
Interest expense   10
Net loans made to/(repayments from) related parties 60,566 (82,701)
Joint ventures [member]    
Disclosure of transactions between related parties [Line Items]    
Sales of goods/services 0 0
Associates [member]    
Disclosure of transactions between related parties [Line Items]    
Sales of goods/services 0 0
Purchases of goods/services 1,358,016 1,052,885
Interest income 19,337 34,911
Interest expense   6
Dividends received 693,105 619,894
Net loans made to/(repayments from) related parties $ (599,979) $ (272,276)