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Financial risk management and derivative financial instruments - Summary of covenant tests (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Disclosure Of Detailed Information About Covenant Tests [Line Items] |  |  |
Covenant net debt | $ 2,782 | $ 2,272 | $ 1,851
Covenant Measures [Member] |  |  |
Disclosure Of Detailed Information About Covenant Tests [Line Items] |  |  |
Covenant EBITDA | 1,195 | 1,086 | 896
Covenant net debt | 2,804 | 2,328 | 1,898
Covenant interest payable | $ 123 | $ 88 | $ 109
Leverage | 2.35 | 2.14 | 2.12
Interest cover | 9.72 | 12.34 | 8.22

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