Revenue Recognition (Revenue by Business Segment by Geography) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 200,000	$ 1,300,000	$ 2,800,000	$ 4,200,000
Revenue, Net	1,032,900,000	1,030,200,000	2,922,200,000	3,040,400,000
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	637,600,000	594,700,000	1,792,200,000	1,764,400,000
Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	253,300,000	236,900,000	687,900,000	668,100,000
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	142,000,000.0	198,600,000	442,100,000	607,900,000
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.86	0.86	0.86	0.86
International [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	59,800,000	82,700,000	188,100,000	282,300,000
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	300,000	200,000	800,000	900,000
International [Member] | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	59,500,000	82,500,000	187,300,000	281,400,000
CANADA
Disaggregation of Revenue [Line Items]
Revenue, Net	66,300,000	67,300,000	179,100,000	190,300,000
CANADA | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	40,300,000	40,900,000	114,600,000	123,500,000
CANADA | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	26,000,000.0	24,300,000	63,800,000	62,700,000
CANADA | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	0	2,100,000	700,000	4,100,000
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue, Net	906,800,000	880,200,000	2,555,000,000.0	2,567,800,000
UNITED STATES | Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	597,300,000	553,800,000	1,677,600,000	1,640,900,000
UNITED STATES | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	227,000,000.0	212,400,000	623,300,000	604,500,000
UNITED STATES | Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 82,500,000	$ 114,000,000.0	$ 254,100,000	$ 322,400,000