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Trade and Other Receivables - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Disclosure of financial assets [line items]    
Term receivables terms 30 days  
Trade receivables $ 2,403 $ 1,857
Trade receivables [member]    
Disclosure of financial assets [line items]    
Provisions for doubtful debts 3 1
Past due but not impaired [member]    
Disclosure of financial assets [line items]    
Trade receivables $ 14 $ 32
Credit risk [member]    
Disclosure of financial assets [line items]    
Percentage of trade receivables owed from the customers 34.00% 33.00%