Gain (loss) on sales or impairment of long lived assets (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges			$ (1.5)	$ 0.0	$ (0.1)
Gain (Loss) on Sale of Property Plant Equipment	$ 0.6	$ 3.7	(0.6)	3.1	(0.1)
Gain Loss On Sale Or Impairment Of Long Lived Assets, Net			(2.1)	$ 3.1	$ (0.2)
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss			1.2
Other Asset Impairment Charges			$ 0.3