Segment Results (Schedule of Segment Operating Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting [Abstract]
Total consolidated operating income	$ 86.1	$ 70.2
Interest expense	9.0	8.7
Other non-operating (income), net	(3.1)	(2.4)
Earnings before income taxes	$ 80.2	$ 63.9