Restructuring and Other Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
restructuring and other costs [Line Items]
Restructuring Costs	$ 4.0	$ 11.1	$ 18.8	$ 38.2
Other Restructuring Costs	2.1	1.0	21.7	1.0
Other Costs	10.0	0.8	10.0	1.9
Restructuring and other costs	$ 16.1	$ 12.9	$ 50.5	$ 41.1