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Impairment of Non-current Assets - Summary of Goodwill Allocated to Cash Generating Units (Detail) - USD ($)
$ in Millions
Jun. 30, 2022
Jun. 30, 2021
Disclosure of detailed information about goodwill allocated to cash generating unit explanatory [line items]    
Goodwill $ 1,197 $ 1,197
Olympic Dam [member]    
Disclosure of detailed information about goodwill allocated to cash generating unit explanatory [line items]    
Goodwill 1,010 1,010
Other    
Disclosure of detailed information about goodwill allocated to cash generating unit explanatory [line items]    
Goodwill $ 187 $ 187