Accounting for Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2024

Accounting for Asset Retirement Obligations [Abstract]

Reconciliation of Asset Retirement Obligations

The following is a reconciliation of asset retirement obligations as of December 31, 2024 and 2023:

	December 31,
(millions of dollars)	2024			2023
Asset retirement obligation, beginning of period	$	20.8		$	23.8
Accretion expense		1.6			1.1
Other		6.5			(3.8	)
Payments		(0.8	)		(0.1	)
Foreign currency translation		(0.5	)		(0.2	)
Asset retirement obligation, end of period	$	27.6		$	20.8