v3.25.2
Investments Accounted for Using the Equity Method - Summary of Financial Information of Significant Equity Accounted Investments (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Disclosure of significant investments in associates and joint ventures [line items]      
Carrying amount of investments accounted for using the equity method $ 4,107 $ 1,662 $ 1,620
Fair value change on forward exchange derivatives 58 (84) (135)
Profit/(loss) from equity accounted investments, related impairments and expenses 153 (2,656) 594
Dividends received from equity accounted investments 375    
Vicuna Corp [Member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Current assets 54    
Non-current assets 4,570    
Current liabilities (61)    
Non-current liabilities (3)    
Net assets/(liabilities) – 100% 4,560    
Net assets/(liabilities) – Group share 2,280    
Adjustments to net assets related to accounting policy adjustments 76    
Carrying amount of investments accounted for using the equity method 2,356    
Profit/(loss) – 100% 2    
Share of profit/(loss) of equity accounted investments 1    
Profit/(loss) from equity accounted investments, related impairments and expenses 1    
Comprehensive income – 100% 2    
Share of comprehensive income/(loss) – Group share in equity accounted investments 1    
Compania Minera Antamina S.A. [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Current assets 1,773 1,699  
Non-current assets 6,944 6,325  
Current liabilities (970) (987)  
Non-current liabilities (2,599) (2,389)  
Net assets/(liabilities) – 100% 5,148 4,648  
Net assets/(liabilities) – Group share 1,737 1,569  
Adjustments to net assets related to accounting policy adjustments (76) (71)  
Carrying amount of investments accounted for using the equity method 1,661 1,498  
Revenue – 100% 4,627 4,381 4,350
Profit/(loss) – 100% 1,609 1,353 1,571
Share of profit/(loss) of equity accounted investments 543 457 530
Adjustments to share of profit/(loss) related to accounting policy adjustments (5) 8 (79)
Profit/(loss) from equity accounted investments, related impairments and expenses 538 465 451
Comprehensive income – 100% 1,609 1,353 1,571
Share of comprehensive income/(loss) – Group share in equity accounted investments 538 465 451
Dividends received from equity accounted investments 375 397 327
Individually immaterial, associates [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Carrying amount of investments accounted for using the equity method 90 164  
Profit/(loss) from equity accounted investments, related impairments and expenses (141) (89) (72)
Share of comprehensive income/(loss) – Group share in equity accounted investments (141) (89) (72)
Dividends received from equity accounted investments     1
Samarco Mineracao S.A. [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Current assets 877 564  
Non-current assets 6,485 7,214  
Current liabilities (6,180) (3,266)  
Non-current liabilities (20,404) (23,211)  
Net assets/(liabilities) – 100% (19,222) (18,699)  
Net assets/(liabilities) – Group share (9,611) (9,349)  
Investment in Samarco 516 516  
Impairment of the carrying value of the investment in Samarco (1,041) (1,041)  
Recognised additional share of losses, net of capital contributions 7,254 7,891  
Unrecognised losses 2,882 1,983  
Revenue – 100% 1,598 1,553 1,554
Profit/(loss) – 100% (4,032) (6,726) (3,018)
Share of profit/(loss) of equity accounted investments (2,016) (3,363) (1,509)
Adjustments to share of profit/(loss) related to accounting policy adjustments   (6) 23
Additional share of Samarco losses 458 506 452
Fair value change on forward exchange derivatives 414 (199) 471
Movement in unrecognised losses 899 30 778
Profit/(loss) from equity accounted investments, related impairments and expenses (245) (3,032) 215
Comprehensive income – 100% (4,032) (6,726) (3,018)
Share of comprehensive income/(loss) – Group share in equity accounted investments (245) (3,032) 215
Investments accounted for using equity method [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Carrying amount of investments accounted for using the equity method 4,107 1,662  
Profit/(loss) from equity accounted investments, related impairments and expenses 153 (2,656) 594
Share of comprehensive income/(loss) – Group share in equity accounted investments 153 (2,656) 594
Dividends received from equity accounted investments $ 375 $ 397 $ 328