Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2022

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 2022 and 2021 is shown in the following table.

(Thousands of dollars)	2022		2021
Balance at beginning of year	$	971,893	$	849,956
Accretion	46,243		46,613
Liabilities incurred	46,449		54,439
Revisions of previous estimates	(78,229)		48,737
Liabilities settled	(64,255)		(27,824)
Liabilities associated with assets held for sale	—		263
Changes due to translation of foreign currencies	(10,448)		(291)
Balance at end of year	911,653		971,893
Current portion of liability at end of year ¹	(94,385)		(132,117)
Noncurrent portion of liability at end of year	$	817,268	$	839,776

1 Included in “Other accrued liabilities” on the Consolidated Balance Sheets.