v3.25.2
Exceptional Items - Summary of Exceptional Items by Category (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Disclosure of exceptional items [line items]      
Exceptional items gross $ (1,234) $ (6,600) $ (340)
Exceptional items tax 96 837 (266)
Exceptional items net (1,138) (5,763) (606)
Samarco dam failure [member]      
Disclosure of exceptional items [line items]      
Exceptional items gross (914) (3,677) (340)
Exceptional items tax   (85) 17
Exceptional items net (914) (3,762) (323)
Western Australia Nickel (WAN) temporary suspension [member]      
Disclosure of exceptional items [line items]      
Exceptional items gross (320)    
Exceptional items tax 96    
Exceptional items net (224)    
Chilean Tax Reform [Member]      
Disclosure of exceptional items [line items]      
Exceptional items tax     (283)
Exceptional items net     (283)
Impairment of Western Australia Nickel assets [member]      
Disclosure of exceptional items [line items]      
Exceptional items gross   (3,800)  
Exceptional items tax   1,125  
Exceptional items net   (2,675)  
Blackwater and Daunia gain on divestment [member]      
Disclosure of exceptional items [line items]      
Exceptional items gross   877  
Exceptional items tax   (203)  
Exceptional items net   674  
Attributable to non-controlling interests [member]      
Disclosure of exceptional items [line items]      
Exceptional items tax     (107)
Exceptional items net     (107)
Attributable to BHP shareholders [member]      
Disclosure of exceptional items [line items]      
Exceptional items gross (1,234) (6,600) (340)
Exceptional items tax 96 837 (159)
Exceptional items net $ (1,138) $ (5,763) $ (499)