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Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 100.4	$ 100.4
Accumulated amortization	(85.7)	(83.4)
Intangible assets, net	14.7	17.0
Developed technology
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 47.0	50.9
Developed technology | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	0 years
Patents
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 13.0	13.0
Patents | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	8 years 1 month 6 days
Software
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 19.2	17.8
Software | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	2 years 3 months 18 days
Assembled workforce in asset acquisitions
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 12.6	10.1
Assembled workforce in asset acquisitions | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	1 year 9 months 18 days
Licenses
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 4.6	4.6
Licenses | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	2 years 4 months 24 days
Non-compete agreements, trademarks and other
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 4.0	$ 4.0
Non-compete agreements, trademarks and other | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	6 years 1 month 6 days

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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