Asset Retirement Obligations (Tables)

12 Months Ended

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