Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	May 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of expense of intangible assets		$ 5.2	$ 10.2	$ 9.0	$ 9.6
Software/Technology
Finite-Lived Intangible Assets [Line Items]
Amortization of expense of intangible assets		$ 0.5	$ 1.4	1.2	$ 1.0
Software/Technology | Products and Systems
Finite-Lived Intangible Assets [Line Items]
Impairment of finite-lived intangible assets	$ 2.6			2.4
Customer relationships | Products and Systems
Finite-Lived Intangible Assets [Line Items]
Impairment of finite-lived intangible assets				0.2
Other | Products and Systems
Finite-Lived Intangible Assets [Line Items]
Impairment of finite-lived intangible assets				$ 0.1