Commitments and Contingencies Marshalltown Tornado and Recovery (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Insurance recoveries received	$ 76.0	$ 0.0
Site clean-up and remediation	17.1
Factory inefficiencies	4.0
Other	8.5
Total expense	29.6
Net Loss(gain) from natural disaster, net of Insurance recoveries	46.4
Loss (gain) from natural disaster, net of Insurance recoveries	6.9	0.0
Insurance proceeds for lost profits	$ 39.5	$ 0.0