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Other Equity - Summary of Financial Information Relating to Subsidiaries with Non-controlling Interests (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Disclosure of significant subsidiaries [line items]      
Current assets $ 28,664 $ 26,693  
Non-current assets 66,502 82,234 $ 84,262
Current liabilities (16,919) (16,403)  
Non-current liabilities (29,481) (36,919)  
Net assets 48,766 55,605  
Net assets attributable to NCI 3,809 4,341  
Revenue 65,098 56,921 38,924
Profit after taxation 33,055 13,451 8,736
Other comprehensive income (75) 59 (69)
Total comprehensive income 32,980 13,510 8,667
Profit after taxation attributable to NCI 2,155 2,147 780
Net operating cash flow 32,174 27,234 15,706
Net investing cash flow (6,959) (7,845) (7,616)
Net financing cash flow $ (22,767) $ (17,922) $ (9,752)
Minera Escondida Limitada [member]      
Disclosure of significant subsidiaries [line items]      
Group share (per cent) 57.50% 57.50%  
Current assets $ 2,929 $ 2,996  
Non-current assets 11,636 11,867  
Current liabilities (2,192) (1,912)  
Non-current liabilities (4,762) (4,733)  
Net assets 7,611 8,218  
Net assets attributable to NCI 3,235 3,493  
Revenue 9,500 9,470  
Profit after taxation 3,522 3,605  
Other comprehensive income 11 27  
Total comprehensive income 3,533 3,632  
Profit after taxation attributable to NCI 1,497 1,532  
Other comprehensive income attributable to NCI 5 11  
Net operating cash flow 4,519 5,007  
Net investing cash flow (860) (655)  
Net financing cash flow (4,029) (4,001)  
Dividends paid to NCI 1,760 1,590  
Other individually immaterial subsidiaries [member]      
Disclosure of significant subsidiaries [line items]      
Net assets attributable to NCI 574 848  
Profit after taxation attributable to NCI 658 615  
Dividends paid to NCI 780 537  
Subsidiaries with material non-controlling interests [member]      
Disclosure of significant subsidiaries [line items]      
Net assets attributable to NCI 3,809 4,341  
Profit after taxation attributable to NCI 2,155 2,147  
Other comprehensive income attributable to NCI 5 11  
Dividends paid to NCI $ 2,540 $ 2,127