Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Other Intangible Assets

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, 2013 and 2012 (in millions):

Balance at December 31, 2011	$	100.2
Acquisitions		10.5
Impairment		(1.4	)
Current period adjustments		6.1
Foreign currency impact		0.5
Balance at December 31, 2012		115.9
Acquisitions		9.2
Current period adjustments		0.8
Foreign currency impact		1.5
Balance at December 31, 2013	$	127.4

Summary of intangible assets

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

	2013							2012
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Existing technology and related patents	$	157.9	$	(68.2	)	$	89.7	$	151.5	$	(47.6	)	$	103.9
Customer relationships		18.0		(7.8	)		10.2		15.3		(7.9	)		7.4
Trade names		0.2		(0.2	)		—		0.2		(0.2	)		—
Intangible assets subject to amortization		176.1		(76.2	)		99.9		167.0		(55.7	)		111.3
In-process research and development		5.7		—			5.7		5.7		—			5.7
Intangible assets	$	181.8	$	(76.2	)	$	105.6	$	172.7	$	(55.7	)	$	117.0

Schedule of estimated future amortization expense related to amortizable intangible assets

The estimated future amortization expense related to amortizable intangible assets at December 31, 2013 is as follows (in millions):

2014	$	21.0
2015		21.0
2016		20.5
2017		20.1
2018		12.9
Thereafter		4.4
Total	$	99.9