Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Other Intangible Assets [Abstract]

Intangible Assets Subject to Amortization

Intangible assets subject to amortization as of June 30, 2019 and December 31, 2018 were as follows:

			June 30, 2019				Dec. 31, 2018
(millions of dollars)	Weighted Average Useful Life (Years)		Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Tradenames		35	$	203.9	$	29.5	$	204.2	$	26.6
Technology		13		18.8		7.2		18.8		6.4
Patents		19		6.4		5.8		6.4		5.6
Customer relationships		22		25.1		3.8		26.5		3.2
		32	$	254.2	$	46.3	$	255.9	$	41.8