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Assets Held for Sale and Discontinued Operations (Major Categories of Assets and Liabilities Reflected as Held for Sale) (Details) - Discontinued operations, held-for-sale or disposed of by sale - Brunei Exploration And Production Operations - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Current assets |  |
Property, plant, and equipment, net | $ 15,561 | $ 15,453
Total current assets associated with assets held for sale | $ 15,561 | $ 15,453

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