Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	$ 176.6		$ 176.3
Accumulated Amortization, intangible assets subject to amortization	(106.9)		(102.2)
Net Carrying Amount, intangible assets subject to amortization	69.7		74.1
Gross Carrying Amount, total intangible assets	177.2		176.9
Net Carrying Amount, total intangible assets	70.3		74.7
Amortization expense related to intangible assets subject to amortization	5.4	$ 5.2
In-process research and development
Intangible assets:
Gross Carrying Amount, intangible assets not subject to amortization	0.6		0.6
Net Carrying Amount, intangible assets not subject to amortization	0.6		0.6
Existing technology and related patents
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	154.7		154.5
Accumulated Amortization, intangible assets subject to amortization	(99.6)		(95.5)
Net Carrying Amount, intangible assets subject to amortization	55.1		59.0
Customer relationships
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	18.5		18.4
Accumulated Amortization, intangible assets subject to amortization	(6.4)		(5.9)
Net Carrying Amount, intangible assets subject to amortization	12.1		12.5
Non compete contracts
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	1.8		1.8
Accumulated Amortization, intangible assets subject to amortization	(0.7)		(0.6)
Net Carrying Amount, intangible assets subject to amortization	1.1		1.2
Trade names
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	1.6		1.6
Accumulated Amortization, intangible assets subject to amortization	(0.2)		(0.2)
Net Carrying Amount, intangible assets subject to amortization	$ 1.4		$ 1.4