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Other Financial Assets and Liabilities - Additional Information (Detail) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 USD ($) bbl | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
Other financial assets and liabilities [line items] |  |  |
Percentage of oil delivered | 49.00% |  |
Hedging instrument, assets | $ 29.3 |  |
2026 [member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Percentage of hedged pricing risk | 9.00% |  |
2025 [member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Percentage of hedged pricing risk | 48.00% |  |
Hedging instrument, assets | $ 15.0 |  |
2024 [member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Percentage of hedged pricing risk | 70.00% |  |
Oil Swaps [Member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Oil and gas sale price | bbl | 75.6 |  |
Oil Swaps [Member] | 2025 [member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Oil and gas sale price | bbl | 81.2 |  |
Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Gain loss on financial liabilities at fair value through profit or loss | $ 153.0 | $ 52.0 |
Derivative financial liabilities | $ 188.0 |  | $ 35.0
Discount rate, measurement input [member] | Top of range [member] | Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Discount rate pre tax | 6.95 |  |
Discount rate, measurement input [member] | Bottom of range [member] | Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Discount rate pre tax | 5.8 |  |
Inflation Rate [Member] | Embedded Derivatives [Member] | Financial liabilities at fair value through profit or loss, category [member] | Long Term Sale And Gas Purchase Contract With Perdman [Member] |  |  |
Other financial assets and liabilities [line items] |  |  |
Inflation rate | 2.50% |  |

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