Reportable Business Segments (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of depreciation and amortization expense by business segment
Total depreciation and amortization	$ 60.8	$ 58.9	$ 55.4
Residential Heating and Cooling [Member]
Summary of depreciation and amortization expense by business segment
Total depreciation and amortization	20.7	20.5	19.9
Commercial Heating and Cooling [Member]
Summary of depreciation and amortization expense by business segment
Total depreciation and amortization	9.3	9.0	8.5
Refrigeration [Member]
Summary of depreciation and amortization expense by business segment
Total depreciation and amortization	16.3	15.3	13.0
Corporate and Other [Member]
Summary of depreciation and amortization expense by business segment
Total depreciation and amortization	$ 14.5	$ 14.1	$ 14.0