Reportable Business Segments (Assets by Segment) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total assets	$ 2,567.6	$ 2,171.9	$ 2,032.5
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total assets	1,456.4	1,149.7	1,034.6
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total assets	456.4	366.2	366.5
Refrigeration [Member]
Segment Reporting Information [Line Items]
Total assets	443.6	426.6	387.9
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 211.2	$ 229.4	$ 243.5