v3.26.1
Subsidiaries - Summary of Significant Subsidiaries (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure of significant subsidiaries [line items]    
Equity contributed net of tax $ 76  
BHP Iron Ore (Jimblebar) Pty Ltd [member]    
Disclosure of significant subsidiaries [line items]    
Effective Group interest 92.50%  
Proportion of ownership interest in subsidiary [1] 85.00% 85.00%
Group's interest [1] 85.00% 85.00%
[1] The Group has an effective interest of 92.5 per cent in BHP Iron Ore (Jimblebar) Pty Ltd; however, by virtue of the shareholder agreement with ITOCHU Iron Ore Australia Pty Ltd and Mitsui & Co. Iron Ore Exploration & Mining Pty Ltd, the Group’s interest in the Jimblebar mining operation is 85 per cent, which is consistent with the other respective contractual arrangements at Western Australia Iron Ore.