Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets

Schedule of changes in the carrying amount of goodwill

        The following table sets forth the changes in the carrying amount of goodwill for the years ended December 31, 2017, 2016 and 2015 (in millions):

Balance at December 31, 2014	$	127.8
Current period additions/adjustments		6.8
Impairment		(0.7	)
Foreign currency impact		(3.3	)
Balance at December 31, 2015	$	130.6
Current period additions/adjustments		1.0
Foreign currency impact		(1.0	)
Balance at December 31, 2016		130.6
Current period additions/adjustments		33.8
Foreign currency impact		5.4
Balance at December 31, 2017	$	169.8

Summary of intangible assets

        The following is a summary of intangible assets at December 31, (in millions):

	2017							2016
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Existing technology and related patents	$	195.4	$	(138.9	)	$	56.5	$	169.0	$	(113.9	)	$	55.1
Customer relationships		34.6		(12.9	)		21.7		20.0		(7.9	)		12.1
Non compete conracts		1.8		(1.5	)		0.3		1.8		(1.1	)		0.7
Trade names		4.2		(0.9	)		3.3		1.6		(0.4	)		1.2
Intangible assets subject to amortization		236.0		(154.2	)		81.8		192.4		(123.3	)		69.1
In-process research and development		0.6		—			0.6		0.6		—			0.6
Intangible assets	$	236.6	$	(154.2	)	$	82.4	$	193.0	$	(123.3	)	$	69.7

Schedule of estimated future amortization expense related to amortizable intangible assets

        The estimated future amortization expense related to amortizable intangible assets at December 31, 2017 is as follows (in millions):

2018	$	24.4
2019		16.6
2020		13.3
2021		12.6
2022		6.9
Thereafter		8.0
Total	$	81.8