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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Reconciliation of Beginning and Ending Aggregate Carrying Amount of Asset Retirement Obligations | A reconciliation of the beginning and ending aggregate carrying amount of the ARO for the respective periods presented is shown in the following table.
(Thousands of dollars) | 2024 |  | 2023
Balance at beginning of year | $ | 914,763 |  |  | $ | 911,653 |
Accretion | 52,511 |  |  | 46,059 |
Liabilities incurred | 25,619 |  |  | 20,628 |
Revisions of previous estimates | 29,279 |  |  | 29,056 |
Liabilities settled | (1,898) |  |  | (95,637) |
Changes due to translation of foreign currencies | (11,390) |  |  | 3,004 |
Balance at end of period | 1,008,884 |  |  | 914,763 |
Current portion of liability | (48,080) |  |  | (10,712) |
Non-current portion of liability | $ | 960,804 |  |  | $ | 904,051 |

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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