Exceptional Items - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Disclosure of exceptional items [line items] | |||
| Exceptional items net | $ 5,797 | $ 1,305 | $ 818 |
| Samarco dam failure [member] | |||
| Disclosure of exceptional items [line items] | |||
| Exceptional items net | 1,158 | 176 | $ 1,060 |
| Cerro Colorado impairment [Member] | |||
| Disclosure of exceptional items [line items] | |||
| Exceptional items net | $ 492 | ||
| Current environmental licence, Expiry date | CY2023 | ||
| New South Wales Energy Coal [member] | |||
| Disclosure of exceptional items [line items] | |||
| Exceptional items net | 1,704 | ||
| Cerrejón [Member] | |||
| Disclosure of exceptional items [line items] | |||
| Exceptional items net | 470 | ||
| Impairment of Potash assets [Member] | |||
| Disclosure of exceptional items [line items] | |||
| Exceptional items net | $ 2,065 | ||