Commitments and Contingencies Marshalltown Tornado and Recovery (Details) - USD ($) $ in Millions	3 Months Ended					12 Months Ended			18 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Insurance recoveries received for property damage incurred from natural disaster						$ (79.6)	$ (10.9)	$ 0.0
Insurance recoveries received for property damage incurred from natural disaster						79.6	10.9	0.0
Loss(gain) from natural disaster, net of Insurance recoveries						178.8	38.3	0.0
Insurance Recoveries						243.2	124.3	$ 0.0	$ 367.5
Site clean-up and remediation						20.4	50.9
Factory inefficiencies						9.3	7.4
Write-off of property, plant and equipment						0.0	4.2
Write-off of inventory						0.0	5.8
Other Nonrecurring Expense						34.7	17.7
Total expense due to natural disaster						(64.4)	(86.0)
Gain from insurance recoveries, net of losses incurred	$ 93.4	$ 7.1	$ 31.9	$ 46.4	$ 38.6	178.8	38.3
Insurance proceeds for lost profits						$ 99.2	$ 27.4