v3.25.2
Revenue - Summary of Revenue by Segment and Asset (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Disclosure of reportable segments [line items]      
Revenue $ 51,262 $ 55,658 $ 53,817
Group and unallocated items/eliminations [member]      
Disclosure of reportable segments [line items]      
Revenue 767 1,474 2,020
Only copper [member] | Copper [member]      
Disclosure of reportable segments [line items]      
Revenue 19,400 16,107 14,226
Other metals [member] | Copper [member]      
Disclosure of reportable segments [line items]      
Revenue 3,130 2,459 1,801
Steelmaking Coal [member] | Coal [member]      
Disclosure of reportable segments [line items]      
Revenue 3,394 5,793 7,430
Energy​ coal​ [member] | Coal [member]      
Disclosure of reportable segments [line items]      
Revenue 1,652 1,873 3,528
Western Australia Nickel [member] | Group and unallocated items/eliminations [member]      
Disclosure of reportable segments [line items]      
Revenue 758 1,473 2,009
Other revenue [member] | Group and unallocated items/eliminations [member]      
Disclosure of reportable segments [line items]      
Revenue $ 9 $ 1 $ 11