Reportable Business Segments (Net Sales and Segment Profit (Loss) and Reconciliation to Income from Continuing Operations) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Profit (Loss)
Total segment profit			$ 559.2	$ 555.3
Reconciliation to Operating income:
Restructuring charges	$ 0.0	$ 0.0	0.0	0.0
Restructuring charges	0.0	0.0	0.0	0.0
Operating income	355.0	349.0	518.5	517.0
Pension settlements	0.1	0.1	0.6	0.2
Interest Expense, Operating and Nonoperating	14.7	8.3	29.9	14.5
Other Nonoperating Income (Expense)	0.6	0.6	1.5	1.5
Net income before income taxes	$ 339.6	$ 340.0	$ 486.5	$ 500.8