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Trade and other receivables - Summary of Ageing of Trade and Other Receivables (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Financial assets at end of period |  |  |
Gross | $ 771 | $ 686 |
Credit loss allowance | (120) | (106) | $ (117)
Net | 651 | 580 |
Past due 1 to 30 days [member] |  |  |
Financial assets at end of period |  |  |
Gross | 90 | 88 |
Credit loss allowance | (4) | (5) |
Net | 86 | 83 |
Past due 31 to 90 days [member] |  |  |
Financial assets at end of period |  |  |
Gross | 80 | 69 |
Credit loss allowance | (5) | (6) |
Net | 75 | 63 |
Past due 91 to 180 days [member] |  |  |
Financial assets at end of period |  |  |
Gross | 53 | 51 |
Credit loss allowance | (8) | (8) |
Net | 45 | 43 |
Past due 181 to 360 days [member] |  |  |
Financial assets at end of period |  |  |
Gross | 66 | 38 |
Credit loss allowance | (19) | (11) |
Net | 47 | 27 |
Past due more than 361 days [member] |  |  |
Financial assets at end of period |  |  |
Gross | 98 | 86 |
Credit loss allowance | (84) | (75) |
Net | $ 14 | $ 11 |

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