Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 1,200,000	$ 2,100,000	$ 4,200,000	$ 5,900,000
Revenue, Net	1,411,400,000	1,366,300,000	2,460,700,000	2,379,700,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	936,200,000	977,500,000	1,617,200,000	1,659,600,000
Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	407,500,000	327,400,000	716,100,000	606,900,000
Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	67,700,000	61,400,000	127,400,000	113,200,000
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	0.70	0.73	0.69
Equipment Sales | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.87	0.88	0.86	0.87
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	67,700,000	61,400,000	127,400,000	113,700,000
International [Member] | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net		0	0	0
International [Member] | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	500,000
International [Member] | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net	67,700,000	61,400,000	127,400,000	113,200,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	93,000,000.0	88,100,000	148,800,000	151,000,000.0
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	67,700,000	75,700,000	109,400,000	128,200,000
CANADA | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	25,300,000	12,400,000	39,400,000	22,800,000
CANADA | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net		0	0	0
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	1,250,700,000	1,216,800,000	2,184,500,000	2,115,000,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	868,500,000	901,800,000	1,507,800,000	1,531,400,000
UNITED STATES | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 382,200,000	315,000,000.0	676,700,000	583,600,000
UNITED STATES | Corporate & Other
Disaggregation of Revenue [Line Items]
Revenue, Net		$ 0	$ 0	$ 0