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Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Contract with Customer, Liability, Revenue Recognized | $ 800,000 | $ 400,000 | $ 3,100,000 | $ 6,100,000
Revenue, Net | 1,500,900,000 | 1,451,100,000 | 2,573,500,000 | 2,498,200,000
Residential Heating and Cooling [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 1,009,300,000 | 982,300,000 | 1,730,700,000 | 1,656,900,000
Commercial Heating and Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 491,600,000 | 468,800,000 | 842,800,000 | 841,300,000
Corporate & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 0 | 0 | 0 | 0
Sales Channel, Directly to Consumer | Residential Heating and Cooling [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0.74 | 0.76 | 0.74 | 0.75
Equipment Sales | Commercial Heating and Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 0.81 | 0.82 | 0.80 | 0.81
CANADA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 104,300,000 | 82,600,000 | 176,300,000 | 146,300,000
CANADA | Residential Heating and Cooling [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 68,300,000 | 58,800,000 | 121,800,000 | 107,300,000
CANADA | Commercial Heating and Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 36,000,000.0 | 23,800,000 | 54,500,000 | 39,000,000.0
CANADA | Corporate & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 0 | 0 | 0 | 0
UNITED STATES |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 1,396,600,000 | 1,368,500,000 | 2,397,200,000 | 2,351,900,000
UNITED STATES | Residential Heating and Cooling [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 941,000,000.0 | 923,500,000 | 1,608,900,000 | 1,549,600,000
UNITED STATES | Commercial Heating and Cooling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | 455,600,000 | 445,000,000.0 | 788,300,000 | 802,300,000
UNITED STATES | Corporate & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, Net | $ 0 | $ 0 | $ 0 | $ 0

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