v3.25.2
Exceptional Items - Summary of Exceptional Items Related to the Samarco Dam Failure (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Expenses excluding net finance costs:      
Costs incurred directly by BHP Brasil and other BHP entities in relation to the Samarco dam failure $ (32,319) $ (36,750) $ (31,873)
(Loss)/profit from equity accounted investments, related impairments and expenses:      
Fair value change on forward exchange derivatives 58 (84) (135)
Net finance costs (1,111) (1,489) (1,531)
Income tax (expense)/benefit (7,210) (6,447) (7,077)
Exceptional items net (1,138) (5,763) (606)
Samarco dam failure [member]      
Expenses excluding net finance costs:      
Costs incurred directly by BHP Brasil and other BHP entities in relation to the Samarco dam failure (211) (139) (103)
(Loss)/profit from equity accounted investments, related impairments and expenses:      
Samarco dam failure provision (659) (2,833) (256)
Fair value change on forward exchange derivatives 414 (199) 471
Net finance costs (458) (506) (452)
Income tax (expense)/benefit   (85) 17
Exceptional items net $ (914) $ (3,762) $ (323)