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