Gain (loss) on sales or impairment of long lived assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges on long-lived assets	$ (10.7)	$ (9.1)	$ (0.8)
Loss on facility previously held for sale	4.7
Loss on impairment of manufacturing equipment	$ 3.0	0.8
Other Asset Impairment Charges	(0.1)	(10.6)
Loss on Disposal		(1.4)
Loss on sale of manufacturing facilities		2.3	9.2
Gain (loss) on sale of or impairment of long-lived assets	$ (10.8)	$ (6.8)	$ 8.4