Other Operating and Non-Operating Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Nonoperating Income (Expense) [Abstract]
Product line discontinuance charges	$ 10.0	$ 0.0	$ 10.0	$ 0.0
Severance Costs	(2.0)	(1.0)	(4.0)	(3.0)
Standard Product Warranty Accrual, Other Operating Charges and Credits		4.0
Insured Event, Gain (Loss)		1.0
Interest expense	(6.0)	(5.0)	(11.0)	(9.0)
Amortization of debt charges	0.0	(1.0)	(1.0)	(1.0)
Interest Costs Capitalized Adjustment	0.0	(1.0)	0.0	(2.0)
Interest Expense	(6.0)	(4.0)	(12.0)	(8.0)
Interest Income	1.0	2.0	1.0	6.0
Marketable Securities, Gain (Loss)	3.0	0.0	3.0	0.0
SERP market adjustments	0.0	0.0	(1.0)	(1.0)
Investment income	4.0	2.0	3.0	7.0
Net periodic pension cost, excluding service cost	0.0	(1.0)	(1.0)	(1.0)
Gain on acquisition of controlling interest	0.0	0.0	0.0	14.0
Foreign currency gain (loss)	(1.0)	(1.0)	5.0	(4.0)
Total non-operating income (expense)	$ (1.0)	$ (2.0)	$ 4.0	$ 9.0