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Property, Plant and Equipment - Narrative (Details) $ in Millions |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2023 USD ($) | Jul. 31, 2023 CAD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Well costs |  |  | $ 193,405,000 | $ 178,421,000 | $ 171,860,000 | $ 179,481,000
Additions pending the determination of proved reserves |  |  | 47,733,000 | 9,412,000 |  |
Capitalized exploratory well costs charged to expense |  |  | 26,188,000 | 10,472,000 |  |
Exploratory well costs capitalized more than one year |  |  | 184,900,000 |  |  |
Impairment of oil and gas properties |  |  | 0 | 0 |  |
Proceeds from sales of property, plant and equipment |  |  | 0 | $ 47,000 |  |
Subsequent event |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Gain (loss) on sale of property plant equipment | $ 0 |  |  |  |  |
Vietnam |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Exploratory well costs capitalized more than one year |  |  | 112,400,000 |  |  |
United States |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Exploratory well costs capitalized more than one year |  |  | 65,000,000 |  |  |
Canada |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Exploratory well costs capitalized more than one year |  |  | 4,800,000 |  |  |
Canada | Subsequent event |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Proceeds from sales of property, plant and equipment |  | $ 150 |  |  |  |
Brunei |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Exploratory well costs capitalized more than one year |  |  | 2,700,000 |  |  |
Mexico |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Capitalized exploratory well costs charged to expense |  |  | $ 70,300,000 |  |  |

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- Definition Additions to capitalized exploratory well costs that were added during the reporting period pending the determination of proved reserves. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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- Definition Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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- Definition The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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