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Reportable Business Segments (Net Sales and Segment Profit (Loss) and Reconciliation to Income from Continuing Operations) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Profit (Loss) |  |  |
Total segment profit | $ 1,036,300,000 | $ 857,100,000 | $ 665,800,000
Reconciliation to Operating income: |  |  |
Gain (Loss) on Disposition of Business and Related Property | 1,500,000 | (14,100,000) | 0
Impairment charges | 0 | 63,200,000 | 0
Items in (Gains) Losses and other expenses, net that are excluded from segment profit (loss) | 0 | 14,800,000 | 8,100,000
Restructuring charges | 0 | 3,100,000 | 1,500,000
Operating income | 1,034,800,000 | 790,100,000 | 656,200,000
Pension settlements | 400,000 | 800,000 | (200,000)
Interest Expense, Operating and Nonoperating | 38,700,000 | 51,700,000 | 38,700,000
Other Nonoperating Income (Expense) | 1,900,000 | 100,000 | 1,900,000
Income before income taxes | $ 993,800,000 | $ 737,500,000 | $ 615,800,000

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