Reportable Business Segments (Assets by Segment) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 1,760.3	$ 1,677.4	$ 1,764.3
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total assets	673.4	628.3	632.3
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total assets	385.8	363.6	353.4
Refrigeration [Member]
Segment Reporting Information [Line Items]
Total assets	442.8	444.9	551.5
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 258.3	$ 240.6	$ 227.1