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Impairment of Non-current Assets - Schedule of Impairment of Non-current Assets for Cash Generating Unit by Class of Assets and by Reportable Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets $ 75 $ 515  
Total impairment of non-current assets, Property, plant and equipment 73 515  
Total impairment of non-current assets, Goodwill and other intangibles 2    
Net impairment of non-current assets 75 515  
Property, plant and equipment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Net impairment of non-current assets 73 515  
Goodwill and other intangible assets [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets, Goodwill and other intangibles 2    
Net impairment of non-current assets 2    
Continuing operation [member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Net impairment of non-current assets 75 515  
Continuing operation [member] | Property, plant and equipment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets, Property, plant and equipment 73 515 $ 2,474
Net impairment of non-current assets 73 515  
Continuing operation [member] | Goodwill and other intangible assets [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets, Goodwill and other intangibles 2   $ 33
Net impairment of non-current assets 2    
Cerro Colorado [Member] | Copper [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets   455  
Cerro Colorado [Member] | Copper [Member] | Property, plant and equipment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets, Property, plant and equipment   455  
Other [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets 75 60  
Other [Member] | Property, plant and equipment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets, Property, plant and equipment 73 $ 60  
Other [Member] | Goodwill and other intangible assets [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets, Goodwill and other intangibles $ 2