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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, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Disclosure Of Detailed Information About Covenant Tests [Line Items] |  |  |
Net debt | $ 1,851 | $ 1,881 | $ 2,529
Covenant Measures [Member] |  |  |
Disclosure Of Detailed Information About Covenant Tests [Line Items] |  |  |
Covenant EBITDA | 896 | 601 | 272
Net debt | 1,898 | 1,801 | 2,375
Covenant interest payable | $ 109 | $ 133 | $ 111
Leverage | 2.12 | 3 | 8.73
Interest cover | 8.22 | 4.52 | 2.45
Liquidity |  | $ 2,655 | $ 2,925

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- Details
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