Exceptional Items - Summary of Gain on Disposal (Detail) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Apr. 02, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Disclosure of Detailed Information About Gain on Disposal of Subsidiary [Line Items] | ||||
| Net assets disposed | $ 52,218 | $ 49,120 | ||
| Details of the gain on disposal/divestment is as follows: | ||||
| Gain on divestment | $ (1,138) | (5,763) | $ (606) | |
| Blackwater and Daunia Gain on Divestment [member] | ||||
| Disclosure of Detailed Information About Gain on Disposal of Subsidiary [Line Items] | ||||
| Net assets disposed | 820 | |||
| Details of the gain on disposal/divestment is as follows: | ||||
| Cash consideration – BHP share | $ 4,100 | 1,072 | ||
| Deferred and contingent consideration | 690 | |||
| Transaction and other directly attributable costs | (65) | |||
| Income tax expense | (203) | |||
| Gain on divestment | $ 674 | |||