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Property, Plant and Equipment (Tables) | 3 Months Ended
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Mar. 31, 2026
Property, Plant and Equipment [Abstract] |
Schedule of Net Changes in Capitalized Exploratory Well Costs | The following table reflects the net changes in capitalized exploratory well costs during the three-month periods ended March 31, 2026 and 2025.
(Thousands of dollars) | 2026 |  | 2025
Beginning balance at January 1 | $ | 191,821 |  |  | $ | 72,055 |
Additions pending the determination of proved reserves | 84,599 |  |  | 24,790 |
Capitalized exploratory well costs charged to expense | (9,610) |  |  | — |
Balance at March 31 | $ | 266,810 |  |  | $ | 96,845 |
Schedule of Aging of Capitalized Exploratory Well Costs | The following table provides an aging of capitalized exploration well costs based on the date the drilling operations were initiated for each individual project.
| March 31,
| 2026 |  | 2025
(Thousands of dollars) | Amount |  | No. of Projects |  |  |  | Amount |  | No. of Projects |  |
Aging of capitalized well costs: |  |  |  |  |  |  |  |  |  |  |
Zero to one year | $ | 58,556 |  |  | 1 |  |  |  |  | $ | 9,421 |  |  | 2 |  |  |
One to two years | 71,906 |  |  | 2 |  |  |  |  | 65,160 |  |  | 3 |  |  |
Two to three years | 113,934 |  |  | 3 |  |  |  |  | — |  |  | — |  |  |
Three years or more | 22,414 |  |  | 3 |  |  |  |  | 22,264 |  |  | 3 |  |  |
| $ | 266,810 |  |  | 9 |  |  |  |  | $ | 96,845 |  |  | 8 |  |  |

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
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- Definition Tabular disclosure of aging for exploratory well cost capitalized for period of greater than one year after completion of drilling and number of related projects in oil- and gas-producing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
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