Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 2,300,000	$ 800,000	$ 3,000,000.0	$ 3,100,000
Revenue, Net	1,545,300,000	1,500,900,000	2,680,400,000	2,573,500,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	935,600,000	1,009,300,000	1,585,600,000	1,730,700,000
Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	609,700,000	491,600,000	1,094,800,000	842,800,000
Sales Channel, Directly to Consumer | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.73	0.74	0.73	0.74
Equipment Sales | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.84	0.81	0.83	0.80
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	104,400,000	104,300,000	189,100,000	176,300,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	60,200,000	68,300,000	106,200,000	121,800,000
CANADA | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	44,200,000	36,000,000.0	82,900,000	54,500,000
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	1,440,900,000	1,396,600,000	2,491,300,000	2,397,200,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	875,400,000	941,000,000.0	1,479,400,000	1,608,900,000
UNITED STATES | Commercial Heating and Cooling
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 565,500,000	$ 455,600,000	$ 1,011,900,000	$ 788,300,000