Commitments and Contingencies Marshalltown Tornado and Recovery (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Write-off of property, plant and equipment			$ 4.2
Write-off of inventory			5.2
Site clean-up and remediation			28.4
Factory inefficiencies			4.9
Other			6.7
Total expense			49.4
Insurance recoveries received			45.0	$ 0.0
Insurance recoveries receivable			4.1
Loss (gain) from natural disaster, net of Insurance recoveries	$ 0.3	$ 0.0	$ 0.3	$ 0.0