Discontinued Operations - Summary of Net Loss on Disposal of Discontinued Operations (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2021 |
Jun. 30, 2020 |
|
| Disclosure of analysis of single amount of discontinued operations [line items] | |||
| Net assets | $ 55,605 | $ 52,175 | |
| Net loss on disposal | $ (510) | ||
| Discontinued operations [member] | |||
| Disclosure of analysis of single amount of discontinued operations [line items] | |||
| Net assets | 11,111 | ||
| Less non-controlling interest share of net assets disposed | (168) | ||
| BHP Share of net assets disposed | 10,943 | ||
| Gross consideration | 10,555 | ||
| Less transaction costs | (54) | ||
| Income tax expense | (68) | ||
| Net loss on disposal | $ (510) |