Reportable Business Segments (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of capital expenditures by business segment
Total Capital Expenditures	$ 50.2	$ 41.4	$ 43.1
Residential Heating and Cooling [Member]
Summary of capital expenditures by business segment
Total Capital Expenditures	13.7	10.9	17.2
Commercial Heating and Cooling [Member]
Summary of capital expenditures by business segment
Total Capital Expenditures	8.7	6.7	6.5
Refrigeration [Member]
Summary of capital expenditures by business segment
Total Capital Expenditures	15.6	13.2	6.9
Corporate and Other [Member]
Summary of capital expenditures by business segment
Total Capital Expenditures	$ 12.2	$ 10.6	$ 12.5