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Closure and Rehabilitation Provisions - Summary of Closure and Rehabilitation Provisions (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Disclosure of other provisions [line items] |  |  |
Current | $ 2,175 | $ 2,025 |
Non-current | 8,928 | 8,223 |
Closure and rehabilitation provisions [member] |  |  |
Disclosure of other provisions [line items] |  |  |
At the beginning of the financial year | 6,330 | 6,738 |
Increases to existing and new provisions | 318 | 132 |
Exchange translation | (7) | (11) |
Released during the year | (33) | (165) |
Amortisation of discounting impacting net finance costs | 353 | 352 |
Utilisation | (201) | (178) |
Exchange variations impacting foreign currency translation reserve | (2) |  |
Divestment and demerger of subsidiaries and operations | (80) |  |
Transferred to liabilities held for sale |  | (450) |
Other movements | (1) | (1) |
At the end of the financial year | 6,977 | 6,330 | $ 6,738
Current | 361 | 274 |
Non-current | 6,616 | 6,056 |
Closure and rehabilitation provisions [member] | Operating sites [member] |  |  |
Disclosure of other provisions [line items] |  |  |
At the beginning of the financial year | 5,120 |  |
Change in estimate | 494 | 35 |
Exchange translation | (194) | (122) |
At the end of the financial year | 5,535 | 5,120 |
Closure and rehabilitation provisions [member] | Closed sites [member] |  |  |
Disclosure of other provisions [line items] |  |  |
At the beginning of the financial year | 1,210 |  |
Increases to existing and new provisions | 251 | (21) | $ 33
At the end of the financial year | $ 1,442 | $ 1,210 |

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