Commitments and Contingencies (Textuals) (Details) $ in Millions		12 Months Ended			18 Months Ended
	Mar. 01, 2019 USD ($) ft²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Deferred income		$ 13.1	$ 10.1
Expense for known and future asbestos-related litigation		5.4	5.6	$ 3.1
Area of leased office building (in square feet) | ft²	192,000
Purchase price of property at end of lease term	$ 41.2
Percentage of lease balance as final payment end of lease term	87.00%
Debt covenant, debt not paid when due	$ 75.0
Insurance recoveries received		6.6	0.0	$ 243.2	$ 367.5
Marshalltown Wind Storm [Member]
Loss Contingencies [Line Items]
Insurance recoveries received		6.6	6.6
Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Deferred income		13.1	10.1
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Deferred income		$ 29.9	$ 27.9