Reportable Business Segments (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Total assets by business segment
Total assets, excluding discontinued operations	$ 1,764.3	$ 1,626.7	$ 1,593.3
Total assets, discontinued operations	0	0	98.6
Total assets	1,764.3	1,626.7	1,691.9
Residential Heating and Cooling [Member]
Total assets by business segment
Total assets	632.3	500.0	457.5
Commercial Heating and Cooling [Member]
Total assets by business segment
Total assets	353.4	346.3	321.9
Refrigeration [Member]
Total assets by business segment
Total assets	551.5	572.0	585.3
Corporate and Other [Member]
Total assets by business segment
Total assets	$ 227.1	$ 208.4	$ 228.6