Revenue - Summary of Revenue by Segment and Asset (Parenthetical) (Detail) - USD ($)
$ in Millions |
12 Months Ended |
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2019 |
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
$ 60,817
|
$ 42,931
|
$ 44,288
|
| Group and unallocated items/eliminations [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
1,516
|
1,156
|
1,144
|
| Crude oil [member] | Petroleum [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
2,013
|
2,033
|
3,171
|
| Natural gas [member] | Petroleum [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
977
|
980
|
1,259
|
| LNG [member] | Petroleum [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
682
|
774
|
1,179
|
| NGL [member] | Petroleum [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
212
|
198
|
263
|
| Other petroleum [member] | Petroleum [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
62
|
85
|
58
|
| Only copper [member] | Copper [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
14,812
|
10,044
|
10,215
|
| Other metals [member] | Copper [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
914
|
622
|
623
|
| Metallurgical coal [member] | Coal [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
4,260
|
5,311
|
7,568
|
| Thermal coal [member] | Coal [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
894
|
931
|
1,553
|
| Nickel West [member] | Group and unallocated items/eliminations [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
1,545
|
1,189
|
1,193
|
| Other revenue [member] | Group and unallocated items/eliminations [member] |
|
|
|
| Disclosure of reportable segments [line items] |
|
|
|
| Revenue |
$ 22
|
$ 30
|
$ 32
|