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Asset Retirement Obligations (Tables) | 3 Months Ended
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Mar. 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 three-month periods ended March 31, 2024 and 2023 is shown in the following table.
(Thousands of dollars) | March 31, 2024 |  | March 31, 2023
Balance at beginning of year | $ | 914,763 |  |  | $ | 911,653 |
Accretion | 12,774 |  |  | 11,157 |
Liabilities incurred | 8,960 |  |  | 3,605 |
Revisions of previous estimates | 1,995 |  |  | (822) |
Liabilities settled | (737) |  |  | (4,855) |
Changes due to translation of foreign currencies | (3,143) |  |  | 394 |
Balance at end of period | 934,612 |  |  | 921,132 |
Current portion of liability 1 | (17,797) |  |  | (90,774) |
Noncurrent portion of liability | $ | 916,815 |  |  | $ | 830,358 |
1 Included in “Other accrued liabilities” on the Consolidated Balance Sheets.

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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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