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Reportable Business Segments (Net Sales and Segment Profit (Loss) and Reconciliation to Income from Continuing Operations) (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Profit (Loss) |  |  |  |
Total segment profit | $ 310,200,000 | $ 303,300,000 | $ 819,800,000 | $ 788,600,000
Reconciliation to Operating income: |  |  |  |
Restructuring charges | 0 | 0 | 0 | 0
Restructuring charges | 0 | 0 | 0 | 1,600,000
Operating income | 310,200,000 | 303,300,000 | 819,800,000 | 790,200,000
Pension settlements | 100,000 | 100,000 | 300,000 | 400,000
Interest Expense, Operating and Nonoperating | 10,500,000 | 8,900,000 | 25,000,000.0 | 33,200,000
Other Nonoperating Income (Expense) | 800,000 | 400,000 | 2,300,000 | 1,500,000
Net income before income taxes | $ 298,800,000 | $ 293,900,000 | $ 792,200,000 | $ 755,100,000

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