Exceptional Items - Summary of Gain on Disposal (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Apr. 02, 2024 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|||
| Disclosure of Detailed Information About Gain on Disposal of Subsidiary [Line Items] | ||||||
| Net assets disposed | $ 56,321 | $ 52,218 | ||||
| Details of the gain on disposal/divestment is as follows: | ||||||
| Gain on divestment | $ (3,371) | $ (1,138) | $ (5,763) | |||
| 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 | [1] | 690 | ||||
| Transaction and other directly attributable costs | (65) | |||||
| Income tax expense | (203) | |||||
| Gain on divestment | $ 674 | |||||
| ||||||