Other Expense (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other (Income) Expense [Line Items]
Other expense (income), net	$ 1.4	$ 2.7	$ 12.6
Restructuring charges (See Note F)
Other (Income) Expense [Line Items]
Other expense (income), net	8.1	7.8	0.8
Currency loss
Other (Income) Expense [Line Items]
Other expense (income), net	3.0	0.8	1.5
(Gain) loss from diversified investments associated with Executive Stock Unit Program
Other (Income) Expense [Line Items]
Other expense (income), net	(7.2)	1.9	(4.5)
Non-service pension expense (income) (See Note N)
Other (Income) Expense [Line Items]
Other expense (income), net	1.8	(1.3)	17.4
Other income
Other (Income) Expense [Line Items]
Other expense (income), net	$ (4.3)	$ (6.5)	$ (2.6)