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Receivables and other assets - Summary of trade and other receivables (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Trade and other receivables [abstract]    
Non-current trade receivables $ 0 $ 0
Non-current other financial receivables 234 124
Non-current other receivables 470 383
Non-current prepayment of tolling charges to jointly controlled entities 113 218
Non-current pension surpluses (note 28) 466 824
Non-current other prepayments 376 344
Total non-current 1,659 1,893 [1]
Current trade receivables 2,461 2,179
Current other financial receivables 548 462
Current other receivables 347 382
Current prepayment of tolling charges to jointly controlled entities 0 0
Current pension surpluses (note 28) 0 0
Current other prepayments 589 455
Total current 3,945 3,478 [1]
Trade receivables 2,461 2,179
Other financial receivables 782 586
Other receivables 817 765
Prepayment of tolling charges to jointly controlled entities 113 218
Pension surpluses (note 28) 466 824
Other prepayments 965 799
Total 5,604 5,371
Net of provisions for doubtful debts 82 59
Amount held in trust fund $ 349 $ 329
[1] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.