Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 1,500,000	$ 1,300,000	$ 2,600,000	$ 2,900,000
Capitalized Contract Cost, Impairment Loss			0
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	148,200,000	205,500,000	297,100,000	405,500,000
Residential Heating and Cooling [Member] | Sales Channel, Directly to Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	515,200,000	546,700,000	849,800,000	886,300,000
Residential Heating and Cooling [Member] | Sales Channel, Through Intermediary [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	173,900,000	169,300,000	304,800,000	283,400,000
Commercial Heating and Cooling [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	226,600,000	218,700,000	370,200,000	370,200,000
Commercial Heating and Cooling [Member] | Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 34,700,000	$ 33,400,000	$ 64,500,000	$ 61,000,000.0