Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 400,000	$ 1,200,000	$ 6,100,000	$ 4,200,000
Revenue, Net	1,451,100,000	1,411,400,000	2,498,200,000	2,460,700,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	982,300,000	936,200,000	1,656,900,000	1,617,200,000
Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	468,800,000	407,500,000	841,300,000	716,100,000
Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	0	67,700,000	0	127,400,000
Sales Channel, Directly to Consumer | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.76	0.76	0.75	0.73
Equipment Sales | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.82	0.87	0.81	0.86
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	67,700,000	0	127,400,000
International [Member] | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	0
International [Member] | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	0
International [Member] | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	0	67,700,000	0	127,400,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	82,600,000	93,000,000.0	146,300,000	148,800,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	58,800,000	67,700,000	107,300,000	109,400,000
CANADA | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	23,800,000	25,300,000	39,000,000.0	39,400,000
CANADA | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	0
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	1,368,500,000	1,250,700,000	2,351,900,000	2,184,500,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	923,500,000	868,500,000	1,549,600,000	1,507,800,000
UNITED STATES | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	445,000,000.0	382,200,000	802,300,000	676,700,000
UNITED STATES | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 0	$ 0	$ 0	$ 0