Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 600,000	$ 1,400,000	$ 2,900,000	$ 5,900,000
Revenue, Net	1,059,900,000	1,055,000,000	3,229,300,000	2,720,100,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	711,000,000.0	722,000,000.0	2,155,300,000	1,808,800,000
Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	211,500,000	207,900,000	663,400,000	574,600,000
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	137,400,000	125,100,000	410,600,000	336,700,000
Sales Channel, Directly to Consumer [Member] | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.73	0.74	0.72	0.75
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.81	0.83	0.83	0.84
service revenue | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.01
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	56,900,000	58,500,000	172,300,000	149,600,000
International [Member] | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	0
International [Member] | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	700,000	600,000	800,000	900,000
International [Member] | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	56,200,000	57,900,000	171,500,000	148,700,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	72,800,000	79,100,000	236,100,000	181,800,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	56,000,000.0	56,400,000	178,500,000	127,000,000.0
CANADA | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	16,800,000	22,700,000	57,600,000	54,800,000
CANADA | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	0
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	930,200,000	917,400,000	2,820,900,000	2,388,700,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	655,000,000.0	665,600,000	1,976,800,000	1,681,800,000
UNITED STATES | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	194,000,000.0	184,600,000	605,000,000.0	518,900,000
UNITED STATES | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 81,200,000	$ 67,200,000	$ 239,100,000	$ 188,000,000.0