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Investments Accounted for Using the Equity Method - Summary of Movements of Investments Accounted for using the Equity Method (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Disclosure of significant investments in associates and joint ventures [line items]      
At the beginning of the financial year $ 2,569 $ 2,473  
(Loss)/profit from equity accounted investments, related impairments and expenses (512) (546) $ 147
Investment in equity accounted investments 242    
Dividends received from equity accounted investments (126)    
Other 412    
At the end of the financial year 2,585 2,569 $ 2,473
Joint ventures [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
(Loss)/profit from equity accounted investments, related impairments and expenses (508)    
Investment in equity accounted investments 95    
Other 413    
Associates [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
At the beginning of the financial year 2,569    
(Loss)/profit from equity accounted investments, related impairments and expenses (4)    
Investment in equity accounted investments 147    
Dividends received from equity accounted investments (126)    
Other (1)    
At the end of the financial year $ 2,585 $ 2,569