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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 104.2	$ 100.4
Accumulated amortization	(46.8)	(85.7)
Intangible assets, net	57.4	14.7
Developed technology
Finite-Lived Intangible Assets [Line Items]
Total intangibles	25.0	47.0
Intangible assets, retired	$ 41.7
Developed technology | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	4 years 10 months 24 days
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 20.5	0.0
Customer relationships | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	4 years 9 months 18 days
Software
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 20.0	19.2
Software | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	2 years 2 months 12 days
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)	7 years 10 months 24 days
Assembled workforce in asset acquisitions
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 12.6	12.6
Assembled workforce in asset acquisitions | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	1 year 7 months 6 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 2 months 12 days
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 5.2	0.7
Trademarks and trade names | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	4 years 10 months 24 days
Other
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 3.3	$ 3.3
Other | Weighted Average
Finite-Lived Intangible Assets [Line Items]
Weighted- average remaining useful life (In years)	6 years

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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