Segment Results (Reconciliation of Total Consolidated Operating Income to Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting [Abstract]
Total consolidated operating income	$ 71.6	$ 78.3	$ 134.8	$ 132.4
Interest expense	5.8	5.6	10.9	11.3
Other non-operating (income), net	(1.4)	(1.6)	(2.7)	(2.9)
Earnings from continuing operations before income taxes	$ 67.2	$ 74.3	$ 126.6	$ 124.0