Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
inventory step-up and backlog amortization		$ 6.6
Acquisition-related and integration charges	$ 1.1	$ 5.2
Goodwill, Acquired During Period	8.7		$ 208.4
Westlock [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 0.0		0.0
Microtronic [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period			$ 208.4