v3.26.1
Segment Reporting - Summary of Reportable Segments (Parenthetical) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Disclosure of reportable segments [line items]      
Costs incurred directly by BHP Brasil and other BHP entities in relation to the Samarco dam failure $ 35,979 $ 32,319 $ 36,750
Proceeds from insurance settlements 514 368 1,285
Impairment loss 2,408 261  
Reversal of impairment loss recognised in profit or loss 2 90  
Samarco dam failure      
Disclosure of reportable segments [line items]      
Costs incurred directly by BHP Brasil and other BHP entities in relation to the Samarco dam failure [1] 215 211 139
Proceeds from insurance settlements [2] 64 0 0
Jansen Project [Member]      
Disclosure of reportable segments [line items]      
Impairment loss 2,300    
Impairment of Western Australia Nickel assets [member]      
Disclosure of reportable segments [line items]      
Impairment loss     3,800
Western Australia Nickel (WAN) temporary suspension [member]      
Disclosure of reportable segments [line items]      
Reversal of impairment loss recognised in profit or loss   90  
Group and unallocated items/eliminations [member] | Samarco dam failure      
Disclosure of reportable segments [line items]      
Costs incurred directly by BHP Brasil and other BHP entities in relation to the Samarco dam failure 170 135 105
Proceeds from insurance settlements $ 64 $ 0 $ 0
[1] Includes legal and advisor costs incurred.
[2] Proceeds from insurance settlements.