Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018, 2017 and 2016 (in millions):

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
Current period additions/adjustments		109.0
Foreign currency impact		(3.1)
Balance at December 31, 2018	$	275.7

Summary of intangible assets

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

	2018						2017
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Existing technology and related patents	$	272.6	$	(160.5)	$	112.1	$	195.4	$	(138.9)	$	56.5
Customer relationships		112.0		(18.1)		93.9		34.6		(12.9)		21.7
Non compete conracts		1.8		(1.8)		—		1.8		(1.5)		0.3
Trade names		11.6		(1.6)		10.0		4.2		(0.9)		3.3
Other		5.1		(2.4)		2.7		—		—		—
Intangible assets subject to amortization		403.1		(184.4)		218.7		236.0		(154.2)		81.8
In-process research and development		—		—		—		0.6		—		0.6
Intangible assets	$	403.1	$	(184.4)	$	218.7	$	236.6	$	(154.2)	$	82.4

Schedule of estimated future amortization expense related to amortizable intangible assets

The estimated future amortization expense related to amortizable intangible assets at December 31, 2018 is as follows (in millions):

2019	$	34.9
2020		29.7
2021		27.7
2022		21.8
2023		19.1
Thereafter		85.5
Total	$	218.7