Other Expense, Net (Tables)

12 Months Ended

Dec. 31, 2017

Other Income and Expenses [Abstract]

Schedule of Other Expense, Net

Included in other expense, net are the following:

	2017			2016			2015
	(In millions of dollars)
Interest income	$	0.7		$	0.4		$	0.3
Interest expense	(2.7		)	(3.8		)	(3.8		)
Dividend income	1.5			1.2			0.9
Foreign exchange (losses) gains	(1.1		)	1.6			(0.9		)
Other	—			(0.1		)	—
Other expense, net	$	(1.6	)	$	(0.7	)	$	(3.5	)