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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, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of significant investments in associates and joint ventures [line items]      
Carrying amount of investments accounted for using the equity method $ 1,662 $ 1,620 $ 1,420
Fair value change on forward exchange derivatives (84) (135) 29
(Loss)/profit from equity accounted investments, related impairments and expenses (2,656) 594 (19)
Dividends received from equity accounted investments 397    
Compania Minera Antamina S.A. [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Current assets 1,699 1,519  
Non-current assets 6,325 5,670  
Current liabilities (987) (774)  
Non-current liabilities (2,389) (1,944)  
Net assets/(liabilities) - 100% 4,648 4,471  
Net assets/(liabilities) - Group share 1,569 1,509  
Adjustments to net assets related to accounting policy adjustments (71) (79)  
Carrying amount of investments accounted for using the equity method 1,498 1,430  
Revenue - 100% 4,381 4,350 5,264
Profit/(loss) from Continuing operations - 100% 1,353 1,571 2,133
Share of profit/(loss) of equity accounted investments 457 530 720
Adjustments to share of profit/(loss) related to accounting policy adjustments 8 (79)  
(Loss)/profit from equity accounted investments, related impairments and expenses 465 451 720
Comprehensive income/(loss) - 100% 1,353 1,571 2,133
Share of comprehensive income/(loss) - Group share in equity accounted investments 465 451 720
Dividends received from equity accounted investments 397 327 776
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 164 190  
(Loss)/profit from equity accounted investments, related impairments and expenses (89) (72) (63)
Share of comprehensive income/(loss) - Group share in equity accounted investments (89) (72) (63)
Dividends received from equity accounted investments   1 11
Samarco Mineracao S.A. [member]      
Disclosure of significant investments in associates and joint ventures [line items]      
Current assets 564 537  
Non-current assets 7,214 5,739  
Current liabilities (3,266) (11,167)  
Non-current liabilities (23,211) (10,614)  
Net assets/(liabilities) - 100% (18,699) (15,505)  
Net assets/(liabilities) - Group share (9,349) (7,753)  
Adjustments to net assets related to accounting policy adjustments   291  
Investment in Samarco 516 516  
Impairment of the carrying value of the investment in Samarco (1,041) (1,041)  
Additional share of Samarco losses 7,891 6,034  
Unrecognised losses 1,983 1,953  
Revenue - 100% 1,553 1,554 1,670
Profit/(loss) from Continuing operations - 100% (6,726) (3,018) (528)
Share of profit/(loss) of equity accounted investments (3,363) (1,509) (276)
Adjustments to share of profit/(loss) related to accounting policy adjustments (6) 23  
Additional share of Samarco losses 506 452 290
Fair value change on forward exchange derivatives (199) 471 (81)
Movement in unrecognised losses 30 778 (609)
(Loss)/profit from equity accounted investments, related impairments and expenses (3,032) 215 (676)
Comprehensive income/(loss) - 100% (6,726) (3,018) (528)
Share of comprehensive income/(loss) - Group share in equity accounted investments (3,032) 215 (676)
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 1,662 1,620  
(Loss)/profit from equity accounted investments, related impairments and expenses (2,656) 594 (19)
Share of comprehensive income/(loss) - Group share in equity accounted investments (2,656) 594 (19)
Dividends received from equity accounted investments $ 397 $ 328 $ 787