Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Goodwill and Other Intangible Assets
Goodwill, Gross	$ 28.0		$ 28.0	$ 31.5
Goodwill, Net	28.0		28.0	31.5
Total Goodwill and other intangible assets, Gross	163.6		163.6	175.9
Other intangible assets, Accumulated Amortization	(5.2)		(5.2)	(5.1)
Total goodwill and other intangible assets, Net	158.4		158.4	170.8
Impairment charges			8.8
Goodwill wrote off	3.5
Technology, patents and trade names
Goodwill and Other Intangible Assets
Other intangible assets, Gross	6.7		6.7	6.7
Other intangible assets, Accumulated Amortization	(5.2)		(5.2)	(5.1)
Other intangible assets, Net	1.5		1.5	1.6
In-process research and development
Goodwill and Other Intangible Assets
Other intangible assets, Gross	128.9		128.9	137.7
Other intangible assets, Accumulated Amortization				0.0
Other intangible assets, Net	$ 128.9		$ 128.9	$ 137.7
Impairment charges		$ 8.8