Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	$ 215.2		$ 192.4
Accumulated Amortization, intangible assets subject to amortization	(129.9)		(123.3)
Net Carrying Amount, intangible assets subject to amortization	85.3		69.1
Gross Carrying Amount, total intangible assets	215.8		193.0
Net Carrying Amount, total intangible assets	85.9		69.7
Amortization expense related to intangible assets subject to amortization	6.9	$ 5.4
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	177.2		169.0
Accumulated Amortization, intangible assets subject to amortization	(119.3)		(113.9)
Net Carrying Amount, intangible assets subject to amortization	57.9		55.1
Customer relationships
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	32.5		20.0
Accumulated Amortization, intangible assets subject to amortization	(8.9)		(7.9)
Net Carrying Amount, intangible assets subject to amortization	23.6		12.1
Non compete contracts
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	2.4		1.8
Accumulated Amortization, intangible assets subject to amortization	(1.2)		(1.1)
Net Carrying Amount, intangible assets subject to amortization	1.2		0.7
Trade names
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	3.1		1.6
Accumulated Amortization, intangible assets subject to amortization	(0.5)		(0.4)
Net Carrying Amount, intangible assets subject to amortization	$ 2.6		$ 1.2