Financial Risk Management - Summary of Foreign Currency Risk Arising From Financial Assets and Liabilities, Which Are Denominated In Currencies Other Than The US Dollar (Detail) - Currency risk [member] - USD ($)
$ in Millions |
Jun. 30, 2021 |
Jun. 30, 2020 |
| Disclosure of Detailed Information about Foreign Currency Risk Arising from Financial Assets and Liabilities which are Denominated in Currencies other than the US Dollar Explanatory [Line Items] |
|
|
| Net Financial Assets Liabilities |
$ (4,041)
|
$ (2,968)
|
| Australian dollars |
|
|
| Disclosure of Detailed Information about Foreign Currency Risk Arising from Financial Assets and Liabilities which are Denominated in Currencies other than the US Dollar Explanatory [Line Items] |
|
|
| Net Financial Assets Liabilities |
(4,421)
|
(3,788)
|
| Chilean peso |
|
|
| Disclosure of Detailed Information about Foreign Currency Risk Arising from Financial Assets and Liabilities which are Denominated in Currencies other than the US Dollar Explanatory [Line Items] |
|
|
| Net Financial Assets Liabilities |
(649)
|
(369)
|
| British pond sterling |
|
|
| Disclosure of Detailed Information about Foreign Currency Risk Arising from Financial Assets and Liabilities which are Denominated in Currencies other than the US Dollar Explanatory [Line Items] |
|
|
| Net Financial Assets Liabilities |
535
|
587
|
| Euro |
|
|
| Disclosure of Detailed Information about Foreign Currency Risk Arising from Financial Assets and Liabilities which are Denominated in Currencies other than the US Dollar Explanatory [Line Items] |
|
|
| Net Financial Assets Liabilities |
366
|
619
|
| Other |
|
|
| Disclosure of Detailed Information about Foreign Currency Risk Arising from Financial Assets and Liabilities which are Denominated in Currencies other than the US Dollar Explanatory [Line Items] |
|
|
| Net Financial Assets Liabilities |
$ 128
|
$ (17)
|