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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2023
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) | 2023 |  | 2022
Balance at beginning of year | $ | 911,653 |  |  | $ | 971,893 |
Accretion | 46,059 |  |  | 46,243 |
Liabilities incurred | 20,628 |  |  | 46,449 |
Revisions of previous estimates | 29,056 |  |  | (78,229) |
Liabilities settled | (95,637) |  |  | (64,255) |
Changes due to translation of foreign currencies | 3,004 |  |  | (10,448) |
Balance at end of year | 914,763 |  |  | 911,653 |
Current portion of liability ¹ | (10,712) |  |  | (94,385) |
Noncurrent portion of liability | $ | 904,051 |  |  | $ | 817,268 |
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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