Reportable Business Segments (Net Sales and Segment Profit (Loss) and Reconciliation to Income from Continuing Operations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Profit (Loss)
Total segment profit	$ 155.6	$ 166.8
Reconciliation to Operating income:
Restructuring charges	0.0	0.0
Gain on sale from previous dispositions	0.0	0.0
Operating income	155.6	166.8
Pension settlements	0.1	0.0
Interest Expense, Operating and Nonoperating	6.2	11.8
Other Nonoperating Income (Expense)	0.9	0.8
Net income before income taxes	$ 148.4	$ 154.2