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Close-down, restoration and environmental provisions - Additional information (Details) $ in Millions | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) | Jun. 30, 2024 | Dec. 31, 2023 USD ($) | Jun. 30, 2023 | Dec. 31, 2022 USD ($) | Jun. 30, 2022
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Average period of underlying cash flows (in years) | 30 years |  |  |  |  |
Remaining lives of operations and infrastructure present closure obligation | 14 years |  |  |  |  |
Provisions | $ 1,456 |  | $ 1,558 |  | $ 1,658 |
Bottom of range |  |  |  |  |  |
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Remaining lives of operations and infrastructure | 1 year |  |  |  |  |
Top of range |  |  |  |  |  |
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Remaining lives of operations and infrastructure | 50 years |  |  |  |  |
Ranger Uranium Mine |  |  |  |  |  |
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Closure liabilities | $ 850 |  |  |  |  |
Kennecott |  |  |  |  |  |
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Environmental loss contingencies, gross | $ 700 |  |  |  |  |
Close down and restoration/ environmental |  |  |  |  |  |
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Closure discount rate | 0.025 | 0.025 | 0.020 | 0.020 |  | 0.015
Provisions | $ 15,731 |  | $ 17,150 |  | $ 15,759 |
Restructuring provision |  |  |  |  |  |
Disclosure of other provisions [Line Items] |  |  |  |  |  |
Decreasing provision | $ 500 |  |  |  |  |

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