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Business combinations - Additional Information (Detail)
$ in Millions
12 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
Integer
May 02, 2023
USD ($)
Disclosure of detailed information about business combination [line items]      
Cash transferred $ 5,868    
Goodwill recognised as of acquisition date 192    
Revenue of acquiree since acquisition date 315    
Profit (loss) of acquiree since acquisition date 17    
Revenue of combined entity as if combination occurred at beginning of period 1,410    
Profit (loss) of combined entity as if combination occurred at beginning of period 114    
Number of Businesses Acquired | Integer   0  
OZ Minerals Limited [member]      
Disclosure of detailed information about business combination [line items]      
Percentage of voting equity interests acquired     100.00%
Cash transferred     $ 5,900
Goodwill recognised as of acquisition date 192    
OZ Minerals Limited [member] | Other Operating Expenses [member]      
Disclosure of detailed information about business combination [line items]      
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination 107    
Business combination, integration related costs $ 24