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Receivables and other assets - Summary of trade and other receivables (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Non-current trade receivables | $ 0 | $ 0
Non-current other financial receivables | 355 | 234
Non-current other receivables | 380 | 470
Non-current prepayment of tolling charges to jointly controlled entities | 94 | 113
Non-current pension surpluses (note 28) | 405 | 466
Non-current other prepayments | 163 | 376
Total non-current | 1,397 | 1,659
Current trade receivables | 2,344 | 2,461
Current other financial receivables | 643 | 548
Current other receivables | 429 | 347
Current prepayment of tolling charges to jointly controlled entities | 0 | 0
Current pension surpluses (note 28) | 0 | 0
Current other prepayments | 825 | 589
Total current | 4,241 | 3,945
Trade receivables | 2,344 | 2,461
Other financial receivables | 998 | 782
Other receivables | 809 | 817
Prepayment of tolling charges to jointly controlled entities | 94 | 113
Pension surpluses (note 28) | 405 | 466
Other prepayments | 988 | 965
Total | 5,638 | 5,604
Amount held in trust fund | 333 | 349
- accumulated impairment | Trade and other financial receivables |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Financial assets | $ (72) | $ (82)

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