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Business combinations - Additional Information (Detail)
$ in Millions
12 Months Ended
May 02, 2024
USD ($)
Jun. 30, 2024
USD ($)
Integer
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
May 02, 2023
USD ($)
Disclosure of detailed information about business combination [line items]          
Number of Business Acquired | Integer   0      
Impairment loss   $ 3,890 $ 75 $ 515  
OZ Minerals Limited [member]          
Disclosure of detailed information about business combination [line items]          
Percentage of voting equity interests acquired         100.00%
Cash transferred   5,868     $ 5,900
Goodwill recognised as of acquisition date   194      
Impairment loss   $ 1,094      
OZ Minerals Limited [member] | Goodwill [member]          
Disclosure of detailed information about business combination [line items]          
Measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration $ 2