Revenue Recognition Revenue by Business Segment Geography (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
Disaggregation of Revenue [Line Items]
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
Residential Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenues									2,291,100,000	2,225,000,000.0	2,140,400,000
Residential Heating and Cooling [Member] | Sales Channel, Directly to Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									0.75	0.76
Residential Heating and Cooling [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Revenues									0	0
Residential Heating and Cooling [Member] | CANADA
Disaggregation of Revenue [Line Items]
Revenues									155,500,000	158,300,000
Residential Heating and Cooling [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues									2,135,600,000	2,066,700,000
Commercial Heating and Cooling [Member]
Disaggregation of Revenue [Line Items]
Revenues									947,400,000	900,700,000	819,500,000
Commercial Heating and Cooling [Member] | Equipment Sales [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									0.86
Commercial Heating and Cooling [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Revenues									1,800,000	2,600,000
Commercial Heating and Cooling [Member] | CANADA
Disaggregation of Revenue [Line Items]
Revenues									98,500,000	92,700,000
Commercial Heating and Cooling [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues									847,100,000	805,400,000
International [Member]
Disaggregation of Revenue [Line Items]
Revenues									247,900,000	353,100,000
CANADA
Disaggregation of Revenue [Line Items]
Revenues									254,700,000	255,500,000
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues									3,304,600,000	3,275,300,000
Refrigeration [Member]
Disaggregation of Revenue [Line Items]
Revenues									568,700,000	758,200,000	$ 879,700,000
Refrigeration [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									0.01
Refrigeration [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Revenues									246,100,000	350,500,000
Refrigeration [Member] | CANADA
Disaggregation of Revenue [Line Items]
Revenues									700,000	4,500,000
Refrigeration [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues									$ 321,900,000	$ 403,200,000