v3.25.2
Significant Events - Summary of Financial Impacts of 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)
Profit/(loss) from equity accounted investments, related impairments and expenses:      
Fair value change on forward exchange derivatives 58 (84) (135)
(Loss)/profit from operations (776) (6,094) 112
Net finance costs (1,111) (1,489) (1,531)
Loss before taxation (1,234) (6,600) (340)
Income tax (expense)/benefit (7,210) (6,447) (7,077)
Loss after taxation (1,138) (5,763) (606)
Balance sheet movement      
Trade and other payables 116 27 1,086
Cash flow statement      
Loss before taxation (1,234) (6,600) (340)
Adjustments for:      
Fair value change on forward exchange derivatives (58) 84 135
(Settlement of)/proceeds from cash management related instruments 195 361 331
Net finance costs 1,111 1,489 1,531
Changes in assets and liabilities:      
Trade and other payables (116) (27) (1,086)
Net operating cash flows 18,692 20,665 18,701
Net investing cash flows (13,350) (8,762) (13,065)
Net (decrease)/increase in cash and cash equivalents (629) 234 (4,679)
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)
Profit/(loss) 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
(Loss)/profit from operations (456) (3,171) 112
Net finance costs (458) (506) (452)
Loss before taxation (914) (3,677) (340)
Income tax (expense)/benefit   (85) 17
Loss after taxation (914) (3,762) (323)
Balance sheet movement      
Other financial assets/(liabilities) 441 (280) 337
Trade and other payables 29 (4) (6)
Tax liabilities   (85) 17
Provisions 656 (2,824) (260)
Net decrease/(increase) in liabilities 1,126 (3,193) 88
Cash flow statement      
Loss before taxation (914) (3,677) (340)
Adjustments for:      
Samarco dam failure provision 659 2,833 256
Fair value change on forward exchange derivatives (414) 199 (471)
(Settlement of)/proceeds from cash management related instruments (17) 218 134
Net finance costs 458 506 452
Changes in assets and liabilities:      
Trade and other payables (29) 4 6
Net operating cash flows (257) 83 37
Net investment and funding of equity accounted investments (1,773) (640) (448)
Net investing cash flows (1,773) (640) (448)
Net (decrease)/increase in cash and cash equivalents $ (2,030) $ (557) $ (411)