Acquisitions - Intangible Assets Acquired (Details) - 4titude Limited $ in Millions	Oct. 05, 2017 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of intangible assets (in years)	10 years 4 months 24 days
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 21.4
Weighted average useful life of intangible assets (in years)	10 years
Completed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 5.2
Weighted average useful life of intangible assets (in years)	13 years
Order or Production Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 0.4
Weighted average useful life of intangible assets (in years)	1 year
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 0.2
Weighted average useful life of intangible assets (in years)	1 year