v3.26.1
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, 2026
Jun. 30, 2025
Jun. 30, 2024
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets $ 2,408 $ 261  
Net impairment of non-current assets 2,406 171  
Reversal of impairment (2) (90)  
Property, plant and equipment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets 2,401 196  
Net impairment of non-current assets 2,399 [1] 106 [1] $ 3,833
Reversal of impairment (2) (90)  
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 7 2  
Net impairment of non-current assets 7 [2] 2 [2] $ 57
Reversal of impairment 0 0  
Equity- accounted investment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets 0 63 [3]  
Net impairment of non-current assets 0 63 [3]  
Reversal of impairment 0 0 [3]  
Jansen Project [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets 2,300    
Jansen Project [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 2,300    
Jansen Project [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 0    
Jansen Project [Member] | Equity- accounted investment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets 0    
Western Australia Nickel [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Reversal of impairment [4]   (90)  
Western Australia Nickel [Member] | Property, plant and equipment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Reversal of impairment [4]   (90)  
Western Australia Nickel [Member] | Goodwill and other intangible assets [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Reversal of impairment [4]   0  
Western Australia Nickel [Member] | Equity- accounted investment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Reversal of impairment [3],[4]   0  
Other [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets 108 261  
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 101 196  
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 7 2  
Other [Member] | Equity- accounted investment [Member]      
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items]      
Total impairment of non-current assets $ 0 $ 63 [3]  
[1] Refer to note 13 'Impairment of non-current assets' for information on impairments.
[2] Refer to note 13 'Impairment of non-current assets' for information on impairments.
[3] Impairment of equity accounted investment is recognised within ‘Profit/(loss) from equity accounted investments, related impairments and expenses’ in the Consolidated Income Statement.
[4] Reversal of impairment was recognised as exceptional. Refer to note 3 'Exceptional items' for further information.