Contingencies, Environmental and Legal Matters (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Loss Contingency Accrual [Roll Forward]
AROs, beginning of period	$ 17.7	$ 5.4	$ 18.5	$ 4.8
Acquisitions	0.0	0.1	0.4	0.4
Accretion expense	0.2	0.2	0.7	0.5
Remeasurements	0.5	0.0	(0.2)	0.0
Payments	(0.4)	0.0	(0.4)	0.0
Foreign currency adjustments	(0.2)	(0.2)	(1.2)	(0.2)
AROs, end of period	$ 17.8	$ 5.5	$ 17.8	$ 5.5