Reportable Business Segments (Capital Expenditures by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 106.8	$ 78.5	$ 105.6
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	70.0	44.0	59.2
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	4.3	5.9	11.3
Refrigeration [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	11.5	9.2	9.4
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 21.0	$ 19.4	$ 25.7