Goodwill and Intangible Assets Finite Lived Intangibles (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Information regarding the gross carrying amount and accumulated amortization of these intangible assets was as follows as of each period presented:

	December 31, 2017			December 31, 2016
	(In millions of dollars)
Gross carrying amount	$	34.7		$	34.7
Accumulated amortization	(9.7		)	(8.3		)
Net carrying amount	$	25.0		$	26.4