Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 2,300,000	$ 5,700,000
Revenue, Net	1,072,600,000	1,047,100,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	721,400,000	674,600,000
Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	351,200,000	372,500,000
Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	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	0.73	0.74
Equipment Sales | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.79	0.83
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0
International [Member] | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0
International [Member] | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0
International [Member] | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	72,200,000	63,700,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	53,600,000	48,500,000
CANADA | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	18,600,000	15,200,000
CANADA | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	1,000,400,000	983,400,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	667,800,000	626,100,000
UNITED STATES | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	332,600,000	357,300,000
UNITED STATES | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 0	$ 0