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Other Financial Assets - Schedule of Other Financial Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of financial assets [line items] |  |
Current | $ 7 | $ 7
Non-current | 212 | 185
Other financial assets | 219 | 192
Equity security [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | 97 | 102
Restricted funds [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | 43 | 50
Ring fenced amounts to satisfy insurance claims, Cash [member] | Restricted funds [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | 1 | 2
Ring fenced amounts to satisfy insurance claims, Money market funds [member] | Restricted funds [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | 10 | 14
Accounts pledged as security | Restricted funds [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | 31 | 32
Other [member] | Restricted funds [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | 1 | 2
Trade and other receivables [member] |  |
Disclosure of financial assets [line items] |  |
Other financial assets | $ 79 | $ 40

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