Accounting for Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2018

Accounting for Asset Retirement Obligations [Abstract]

Reconciliation of Asset Retirement Obligations

The following is a reconciliation of asset retirement obligations as of September 30, 2018:

(millions of dollars)
Asset retirement liability, December 31, 2017	$	22.1
Accretion expense		0.8
Other		0.4
Payments		(1.0	)
Foreign currency translation		(0.5	)
Asset retirement liability, September 30, 2018	$	21.8