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Reportable Business Segments (Equity Method Investments) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Total income from equity method investments | $ 1.2 | $ 1.2
Residential Heating and Cooling [Member] |  |
Segment Reporting Information [Line Items] |  |
Total income from equity method investments | (0.7) | (0.9)
Commercial Heating and Cooling |  |
Segment Reporting Information [Line Items] |  |
Total income from equity method investments | (0.4) | (0.4)
Corporate & Other |  |
Segment Reporting Information [Line Items] |  |
Total income from equity method investments | $ (0.1) | $ 0.1

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