Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 1,300,000	$ 4,200,000
Capitalized Contract Cost, Impairment Loss		0
Refrigeration [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	156,800,000	495,800,000
Sales Channel, Directly to Consumer [Member] | Residential Heating and Cooling [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	459,900,000	1,346,200,000
Sales Channel, Through Intermediary [Member] | Residential Heating and Cooling [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	134,800,000	418,200,000
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	242,600,000	679,200,000
Commercial Heating and Cooling [Member] | Commercial Heating and Cooling [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 33,200,000	$ 94,300,000