Goodwill (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

A reconciliation of the change in the carrying value of goodwill was as follows (in millions):

	June 30, 2017			December 31, 2016
	(In millions of dollars)
Balance at beginning of year	$	37.2		$	37.2
Goodwill impairment	(18.4		)	—
Balance at end of period	$	18.8		$	37.2