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Investment in Associates and joint ventures - Summary of Financial Information of Material Associate Investment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of associates [line items] |  |  |  |
Non-current assets |  | $ 2,879 | $ 2,684 |
Current assets |  | 1,869 | 2,129 |
Current liabilities |  | (1,928) | (2,190) |
Non-current liabilities |  | (5,128) | (4,569) |
Net assets |  | (2,308) | (1,946) |
Revenue |  | 4,923 | 4,624 | $ 3,892
Profit from continuing operations and total comprehensive income for the year |  | 628 | 750 | $ 376
Barclay associate [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Non-current assets |  | 449 | 462 |
Current assets |  | 112 | 86 |
Current liabilities |  | (21) | (23) |
Non-current liabilities |  | (236) | (256) |
Net assets |  | 304 | 269 |
Effect of specially allocated expenses |  | (42) | (42) |
Revenue |  | 130 | 131 |
Profit from continuing operations and total comprehensive income for the year |  | 15 | 15 |
Group's share of profit for the year | [1] | 4 | 3 |
Barclay associate [member] | Group share of reported net assets at 19.9% [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Net assets |  | 60 | 53 |
Adjustments to reflect impairment, capitalised costs, and additional rights and obligations under the shareholder agreement |  | (11) | (8) |
Carrying amount |  | $ 7 | $ 3 |
[1] | Includes specially allocated expenses and the cost of funding owner returns.

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