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Provisions (Tables) | 6 Months Ended
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Jun. 30, 2024
Provisions [abstract] |
Summary of Information About Provisions |
|  | Restoration 1 US$m |  |  | Employee benefits US$m |  |  | Other US$m |  |  | Total US$m |
Half-year ended 30 June 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At 1 January 2024 |  |  | 7,154 |  |  |  | 522 |  |  |  | 281 |  |  |  | 7,957 |
Change in provision |  |  | (449 | ) |  |  | (31 | ) |  |  | 55 |  |  |  | (425 | )
Unwinding of present value discount |  |  | 144 |  |  |  | — |  |  |  | 1 |  |  |  | 145 |
Carrying amount at 30 June 2024 |  |  | 6,849 |  |  |  | 491 |  |  |  | 337 |  |  |  | 7,677 |
Current |  |  | 698 |  |  |  | 302 |  |  |  | 223 |  |  |  | 1,223 |
Non-current |  |  | 6,151 |  |  |  | 189 |  |  |  | 114 |  |  |  | 6,454 |
Net carrying amount |  |  | 6,849 |  |  |  | 491 |  |  |  | 337 |  |  |  | 7,677 |
Year ended 31 December 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At 1 January 2023 |  |  | 6,253 |  |  |  | 517 |  |  |  | 409 |  |  |  | 7,179 |
Change in provision |  |  | 664 |  |  |  | 5 |  |  |  | (128 | ) |  |  | 541 |
Unwinding of present value discount |  |  | 237 |  |  |  | — |  |  |  | — |  |  |  | 237 |
Carrying amount at 31 December 2023 |  |  | 7,154 |  |  |  | 522 |  |  |  | 281 |  |  |  | 7,957 |
Current |  |  | 1,011 |  |  |  | 351 |  |  |  | 144 |  |  |  | 1,506 |
Non-current |  |  | 6,143 |  |  |  | 171 |  |  |  | 137 |  |  |  | 6,451 |
Net carrying amount |  |  | 7,154 |  |  |  | 522 |  |  |  | 281 |  |  |  | 7,957 |
1. | 2024 change in provision is due to a revision of discount rates of $147 million (primarily due to an increase in risk-free rates), changes in foreign exchange rates of $84 million and provisions used of $358 million, offset by changes in estimates of $140 million.

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