Segment Results (Reconciliation of Total Consolidated Operating Income to Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting [Abstract]
Total consolidated operating income	$ 73.3	$ 72.1	$ 208.1	$ 204.5
Interest expense	7.0	6.1	17.9	17.4
Other non-operating (income), net	(1.4)	(1.4)	(4.1)	(4.3)
Earnings from continuing operations before income taxes	$ 67.7	$ 67.4	$ 194.3	$ 191.4