Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 800,000	$ 2,900,000	$ 2,400,000	$ 4,500,000
Revenue, Net	1,239,000,000.0	941,300,000	2,169,400,000	1,665,100,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	838,000,000.0	644,800,000	1,444,200,000	1,086,900,000
Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	252,800,000	188,300,000	452,000,000.0	366,700,000
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	148,200,000	108,200,000	273,200,000	211,500,000
Sales Channel, Directly to Consumer [Member] | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.76	0.76	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	0.85	0.86	0.84	0.85
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	66,200,000	47,100,000	115,500,000	91,100,000
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	200,000	200,000	200,000	400,000
International [Member] | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	66,000,000.0	46,900,000	115,300,000	90,700,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	98,900,000	56,000,000.0	163,200,000	102,700,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	75,000,000.0	41,000,000.0	122,400,000	70,700,000
CANADA | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	23,900,000	15,000,000.0	40,800,000	32,000,000.0
CANADA | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	0
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	1,073,900,000	838,200,000	1,890,700,000	1,471,300,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	763,000,000.0	603,800,000	1,321,800,000	1,016,200,000
UNITED STATES | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	228,700,000	173,100,000	411,000,000.0	334,300,000
UNITED STATES | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 82,200,000	$ 61,300,000	$ 157,900,000	$ 120,800,000