Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 885,000,000.0	$ 1,032,900,000	$ 1,099,100,000	$ 790,300,000	$ 843,600,000	$ 1,030,200,000	$ 1,175,400,000	$ 834,800,000	$ 3,807,200,000	$ 3,883,900,000	$ 3,839,600,000
Contract with Customer, Liability, Revenue Recognized									3,300,000	4,800,000
Residential Heating and Cooling [Member]
Revenues									2,291,100,000	2,225,000,000.0	2,140,400,000
Commercial Heating and Cooling [Member]
Revenues									947,400,000	900,700,000	819,500,000
Refrigeration [Member]
Revenues									568,700,000	758,200,000	$ 879,700,000
Sales Channel, Directly to Consumer [Member] | Residential Heating and Cooling [Member]
Revenue from Contract with Customer, Excluding Assessed Tax									0.75	$ 0.76
Equipment Sales [Member] | Commercial Heating and Cooling [Member]
Revenue from Contract with Customer, Excluding Assessed Tax									0.86
Service [Member] | Refrigeration [Member]
Revenue from Contract with Customer, Excluding Assessed Tax									$ 0.01