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Financial risk management and derivative financial instruments - Summary of Amended Covenant Test Levels For Syndicated and Bilateral Facilities (Detail) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 USD ($)
Amended covenant test levels for revolving credit facility [Line Items] |  |  |
Liquidity |  |  | $ 400
Minimum [Member] |  |  |
Amended covenant test levels for revolving credit facility [Line Items] |  |  |
Interest cover | 3.5 | 3.5 |
Maximum [Member] |  |  |
Amended covenant test levels for revolving credit facility [Line Items] |  |  |
Leverage | 4 | 4 |

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- Definition Amended covenant test levels for revolving credit facility. + References No definition available. + Details
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- Definition Covenant liquidity. + References No definition available. + Details
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- Definition Interest cover ratio. + References No definition available. + Details
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- Definition Leverage ratio. + References No definition available. + Details
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- Details
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- Details
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