Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 1,400,000	$ 200,000	$ 5,900,000	$ 2,800,000
Revenue, Net	1,055,000,000.0	1,032,900,000	2,720,100,000	2,922,200,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	722,000,000.0	637,600,000	1,808,800,000	1,792,200,000
Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	207,900,000	253,300,000	574,600,000	687,900,000
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	125,100,000	142,000,000.0	336,700,000	442,100,000
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.83	0.86	0.84	0.86
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	58,500,000	59,800,000	149,600,000	188,100,000
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	600,000	300,000	900,000	800,000
International [Member] | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	57,900,000	59,500,000	148,700,000	187,300,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	79,100,000	66,300,000	181,800,000	179,100,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	56,400,000	40,300,000	127,000,000.0	114,600,000
CANADA | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	22,700,000	26,000,000.0	54,800,000	63,800,000
CANADA | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	700,000
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	917,400,000	906,800,000	2,388,700,000	2,555,000,000.0
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	665,600,000	597,300,000	1,681,800,000	1,677,600,000
UNITED STATES | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	184,600,000	227,000,000.0	518,900,000	623,300,000
UNITED STATES | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 67,200,000	$ 82,500,000	$ 188,000,000.0	$ 254,100,000