Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 1,300,000	$ 2,900,000
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	165,400,000	339,000,000
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	546,700,000	886,300,000
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	169,300,000	283,400,000
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	279,300,000	457,200,000
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	$ 12,900,000	$ 40,500,000