Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 2,900,000	$ 1,500,000	$ 4,500,000	$ 2,600,000
Revenue, Net	941,300,000	1,099,100,000	1,665,100,000	1,889,400,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	644,800,000	689,100,000	1,086,900,000	1,154,600,000
Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	188,300,000	261,300,000	366,700,000	434,700,000
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	108,200,000	148,700,000	211,500,000	300,100,000
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.86	0.87	0.85	0.85
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	47,100,000	69,000,000.0	91,100,000	128,300,000
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	300,000	400,000	500,000
International [Member] | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	46,900,000	68,700,000	90,700,000	127,800,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	56,000,000.0	63,800,000	102,700,000	112,800,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	41,000,000.0	41,900,000	70,700,000	74,300,000
CANADA | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	15,000,000.0	21,900,000	32,000,000.0	37,800,000
CANADA | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	0	0	700,000
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	838,200,000	966,300,000	1,471,300,000	1,648,300,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	603,800,000	647,200,000	1,016,200,000	1,080,300,000
UNITED STATES | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	173,100,000	239,100,000	334,300,000	396,400,000
UNITED STATES | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 61,300,000	$ 80,000,000.0	$ 120,800,000	$ 171,600,000