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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, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 4,981,900,000 | $ 4,718,400,000 | $ 4,194,100,000
Segment Profit (Loss) |  |  |
Total segment profit | 857,100,000 | 665,800,000 | 603,900,000
Reconciliation to Operating income: |  |  |
Gain (Loss) on Disposition of Business and Related Property | (14,100,000) | 0 | 0
Special Product Quality Adjustment | 0 | 0 | (2,500,000)
Impairment charges | 63,200,000 | 0 | 0
Items in (Gains) Losses and other expenses, net that are excluded from segment profit (loss) | 14,800,000 | 8,100,000 | 14,300,000
Restructuring charges | 3,100,000 | 1,500,000 | 1,800,000
Operating income | 790,100,000 | $ 656,200,000 | $ 590,300,000
Revenue from transactions with major customers | $ 0 |  |
Minimum percentage of consolidated net sales from single customer | 10.00% | 10.00% | 10.00%
Residential Heating & Cooling [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 3,222,900,000 | $ 3,198,300,000 | $ 2,775,600,000
Segment Profit (Loss) |  |  |
Total segment profit | 610,200,000 | 596,900,000 | 540,300,000
Commercial Heating & Cooling [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,511,400,000 | 1,286,400,000 | 1,188,800,000
Segment Profit (Loss) |  |  |
Total segment profit | 340,800,000 | 162,900,000 | 164,600,000
Corporate & other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 247,600,000 | 233,700,000 | 229,700,000
Segment Profit (Loss) |  |  |
Total segment profit | $ (93,900,000) | $ (94,000,000.0) | $ (101,000,000.0)

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